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G222E-3200 G222E Single sensor configuration - Hydrogen (H2) - Instrument Only / 0.01% Res. / 0 - 4.00 % vol. Range, 2-year sensor warranty by GfG

Sturdy and compact dual gas detector for monitoring toxic gases, H2 and O2

The G222E is the first device in GfG s Micro 5 series. At present, it is the smallest and at the same time one of the lightest one- to two-gas detectors with two electrochemical gas sensors (EC) in the world.

Safety through quality and functionality

Equipped with high-quality, precise and durable sensors, the system is individually tailored to your requirements. Currently, sensors are available for 20 different gases and a wide array of measuring ranges. Combine them according to your requirements or increase the safety of your employees even further by redundant use of the same sensors to minimize the danger from a specific gas.

A simple, two-button menu and a large, easy-to-read display provide easy menu navigation and reliable information even under difficult conditions.

Suitable for long periods of use

Depending on sensor equipment and configuration, the G222E has an average operating time of up to 9 months at 10 hours per working day or 90 days in 24/7 operation. The battery of the G222E can be changed in seconds if necessary and the gas detector is ready for use again.

Data logger

The internal data logger stores the last 2600 events. These include measured values, alarms, TWA and STEL values, and time as well as temperature information.

Calibration Cap & Smart Cap

Calibration and adjustment of the G222E are quite simple. All you need is the Calibration Cap for manual zero and test gas application.

If you want to read out the content of the data logger, you will need the Smart Cap, a USB connection cable and the Config Software for the G222 series instead.

Part Number: 44L-425A

543GP2-3V 54" Galvanized Panel Fan, 3-Wing, 2 Hp, 3-Phase, VFD Compatible by Schaefer

Schaefer's galvanized steel panel fans combine low cost, high airflow and high air speeds for very high ROI livestock cooling. These fans are designed for agricultural livestock buildings requiring large volumes and velocities of air with a belt driven preference. Regardless of application, free stall barns, feed lines or holding pens, Schaefer offers a wide variety of galvanized panel fans to meet your specific needs. Ships fully assembled, complete with belt tensioner.

Features and Benefits

• Industry leading airflow and efficiency with airflows up to 40,000 cfm and efficiencies up to 40 cfm/watt
• Lab tested design for maximum performance and quiet operation
• Heavy gauge galvanized and powder coated steel components
• Thermally protected TEAO motors for long life
• Optional post and column mounts available
• Available in 24", 36", 48", 52" and 54" sizes
• 3-wing or 5-wing blade style
• Two year warranty
• Made in the USA

VTS-K0031101101 Ventis MX4 Multi-Gas Monitor, LEL (Pentane), O2, Li-ion, Desktop Charger, Without Pump, Orange, UL/CSA, English by Industrial Scientific

The Ventis® MX4 is a four-gas monitor with the portability and size of a single-gas monitor. Eliminate the need for extra monitors and transition seamlessly from personal monitoring to confined space entry with the Ventis® Slide-on Pump— ideal for operators who wear their gas monitors primarily for personal protection but occasionally require a pump for confined space entries.

• Detect up to four gases with a wide range of sensor options
• Select alarm set points, set latch alarms, disable instrument shutdown while in alarm, and more
• Save time and reduce human error with maintenance and usage data available from iNet Control software
• Available with or without an integral pump, or with the Ventis Slide-on Pump for ultimate flexibility
• Non-pumped instruments compatible with 12-hour, 18-hour, or 20-hour batteries

The Ventis® Slide-on Pump

The Ventis® Slide-on Pump is ideally suited for operators who wear their gas monitors primarily for personal protection but occasionally require a pump for confined space entries. Available in black or safety orange and powered by its own battery, the slide-on pump is compatible with the Ventis MX4 and Ventis® Pro5 Multi-Gas Monitor.

• Convenient Sampling – Sample draw distance of up to 50 feet provides convenient sampling in a wide range of applications
• Easy to Attach – No tools are required to attach or remove the Ventis Slide-on Pump to or from the monitor
• Uses Same Batterys and Chargers as Ventis – Monitor and pump each use the same batterys, and can easily be exchanged between instruments
• Flexible Battery Options – Three available battery options make this pump extremely flexible in the field

66-5D65-20-R Air Alert Ambient Air Hazardous Gas Detector, Freon (R410A) 0-2000 ppm, DC power, 2 relays by RKI Instruments

The RKI Air Alert series ambient air toxic gas detector is a versatile assembly that uses an electrochemical, infrared or PID sensor element to detect a variety of gases. Wire powered (12 to 35 VDC) with 4-20 mA analog and RS-485 Modbus outputs. Magnetic switches allow for non-intrusive calibration while in the field as well as full system settings and diagnostics.

Features

• Electrochemical, Infrared, or PID sensor element
• Wire powered (3-wire), 12-35 VDC operating voltage, optional AC power supply
• Operating temperature range of -40°C to +70°C
• 3 Push-button interface (ADD, MENU, SUB) with 3 corresponding magnetic, non-intrusive switches
• 2 Dry contact relays (optional)
• Graphical LCD with LED backlight
• Output options: 4-20mA (3-wire) analog, RS-485 Modbus, optional 900 MHz or 2.4 GHz radio
• Optional 3 color LED perimeter and audible alarm
• 1-Year warranty

Industry Applications

• Petrochemical plants, Refineries
• Water & wastewater treatment plants
• Pulp & paper mills
• Manufacturing facilities
• Chemical plants

*Please note we can only ship RKI products to customers within the United States

TDSK180/G Conductivity Solution, 85.2ppm/180uS, 1 Gal by Sensorex

TDS/Conductivity instruments and sensors must be calibrated together. For a single-point calibration, select the one solution that approximates the expected conductivity or ppm level of total salts. Mixed Salt standards are the most frequently used in the field to sample naturally occurring water sources, boiler feed water, or cooling tower water. Typical river water, well water, or lake water sample will contain a mixture of several different salts. Sensorex Mixed Salt standards simulate a "Natural" mixture of common salt compounds found in these sources. Sodium sulfate, sodium bicarbonate, and sodium chloride salts are blended to provide a representative value. There are certain applications where Single Salt Solutions are preferred. NaCl Solution is routinely used to calibrate instruments measuring Sea Water or brackish water samples. Reagent grade salt and high resistivity DI water is compounded for accurate results. KCI Single Salt Solution may be used with conductivity meters that read directly in Siemens or Ohms. KCI (potassium chloride) is established as an international calibration standard for conductivity measurement. Choose the conductivity calibration solution that is right for your application. CA Residents: Prop 65 WARNING(S)

MX6-KJ038211 MX6 iBrid Multi-Gas Monitor, LEL,COSH,O2,CLO2,LE,P,E by Industrial Scientific

The MX6 iBrid® is more than an intelligent hybrid of Industrial Scientific's best monitoring technologies—it's the most adaptable six-gas monitor on the market. With hundreds of possible sensor combinations, and a robust list of available configuration settings, the MX6 iBrid is ready to monitor oxygen, toxic and combustible gas, and volatile organic compounds (VOCs).

As your work changes, so can your MX6 iBrid. It uses five sensor slots to detect up to six gases. Each of those sensor slots accepts a variety of sensors, which means you can use the instrument with a PID sensor one day and an infrared sensor the next. What's more, settings allow you to adapt the instrument's behavior for your application. If you need to use a benzene PID response factor for one application, and butadiene for others, the familiar menu structure will allow you to quickly change settings.

The rugged MX6 iBrid carries our Guaranteed for Life™ warranty and is compatible with DSX™ Docking Stations. With a DSX Docking Station, maintenance is simplified and data becomes more than a spreadsheet filled with logged readings. Proactively manage your gas detection fleet—track trends, know when instrument maintenance will be required, and understand how your MX6 iBrid instruments are being used.

• 24 "Plug-and-Play" field-replaceable sensors including PID and Infrared options
• Up to 6 gases monitored simultaneously
• Simple, user-friendly, customizable, menu-driven navigation
• Five-way navigation button
• Durable, concussion-proof overmold
• Optional integral sampling pump with strong 30.5 meter (100 feet) sample draw
• Full-color graphic LCD is highly visible in a variety of lighting conditions
• Powerful, 95 dB audible alarm

VTS-K1231301111 Ventis MX4 Multi-Gas Monitor, LEL (Pentane), CO, H2S, O2, Li-ion, Auto Charger, Without Pump, Orange, UL/CSA, English by Industrial Scientific

The Ventis® MX4 is a four-gas monitor with the portability and size of a single-gas monitor. Eliminate the need for extra monitors and transition seamlessly from personal monitoring to confined space entry with the Ventis® Slide-on Pump— ideal for operators who wear their gas monitors primarily for personal protection but occasionally require a pump for confined space entries.

• Detect up to four gases with a wide range of sensor options
• Select alarm set points, set latch alarms, disable instrument shutdown while in alarm, and more
• Save time and reduce human error with maintenance and usage data available from iNet Control software
• Available with or without an integral pump, or with the Ventis Slide-on Pump for ultimate flexibility
• Non-pumped instruments compatible with 12-hour, 18-hour, or 20-hour batteries

The Ventis® Slide-on Pump

The Ventis® Slide-on Pump is ideally suited for operators who wear their gas monitors primarily for personal protection but occasionally require a pump for confined space entries. Available in black or safety orange and powered by its own battery, the slide-on pump is compatible with the Ventis MX4 and Ventis® Pro5 Multi-Gas Monitor.

• Convenient Sampling – Sample draw distance of up to 50 feet provides convenient sampling in a wide range of applications
• Easy to Attach – No tools are required to attach or remove the Ventis Slide-on Pump to or from the monitor
• Uses Same Batterys and Chargers as Ventis – Monitor and pump each use the same batterys, and can easily be exchanged between instruments
• Flexible Battery Options – Three available battery options make this pump extremely flexible in the field

BZ1-L130001101 Radius BZ1 Area Monitor, LEL (Methane), CO, O2, Pump, UL/CSA, English by Industrial Scientific

When it comes to choosing equipment to protect your worksite from gas hazards, rely on the Radius® BZ1 Area Monitor. No other area monitor protects your workers longer in the field with less setup, user training, and time in the shop.

• Detect up to seven gases using 22 sensor options including PID
• Longest running area monitor with a typical run time of 7 days (168 hours)
• Extended Run Time Power Supply can extend battery to over 1 month
• Ultra-bright blue and red lights and attention-grabbing alarms with distinctive tones
• Audible alarms sound at 108 dB at 1 m to cut through high-noise environments
• Largest display of any area monitor on the market
• Intuitive text-based navigation and configuration
• Customizable alarm action messages such as "EVACUATE" or "VENTILATE"
• LENS™ Wireless enables communication between area monitors and Ventis® Pro5 personal monitors
• All-weather sensor deployment and 360-degree gas path for more accurate detection
• DualSense® Technology increases worker safety by using two sensors to detect the same gas

S200C/STD pH Sensor, 12mm, Polymer, 1M, US Std by Sensorex

The Sensorex S200C is one of our most popular laboratory pH electrodes, due to its reliability and low maintenance design. The pH1600 replaces the S200C/BNC pH probe and has the same design, but features a new Ultem® body for superior chemical compatibility. This pH probe performs to the same specifications compared to the Sensorex S200C and is instantly ready for use as a direct fit replacement.

• New Sensorex S200C
• Durable and chemically compatible Ultem® or body
• Reliable and accurate over the full range of pH measurements
• No refilling or maintenance required with sealed gel-filled design
• Instantly ready for use, and has one year guaranteed shelf life
• One year limited warranty

OPT-CST-NMN OmniPoint Transmitter, Stainless Steel, 3/4", Modbus by Honeywell Analytics

The OmniPoint™ transmitter is a comprehensive gas detection solution designed to operate in hazardous locations and support multiple sensors in the detection of toxic, oxygen, and flammable gas hazards.

PROTECTING YOUR WORKERS AND YOUR ENTERPRISE

OmniPoint™ utilizes multiple sensor technologies to meet diverse gas detection challenges in a variety of global industries. Full color, touch key interface and Bluetooth® enabled operation make setup and maintenance intuitive.

Support for up to three sensors makes OmniPoint™ both flexible and scalable to meet your safety requirements.

FEATURES AND BENEFITS

TOUCH KEY USER INTERFACE

• Easy to operate and maintain
• Intuitive configuration and reduced set up time
• No magnet is required
• Monitor up to three sensors from the same flexible transmitter
• Universal electronics module
• Accepts different sensor inputs and simplifies ordering and stocking process

TYPICAL APPLICATIONS INCLUDE

• Power generation
• Hydrogen storage
• Oil and gas refineries
• Chemical and petrochemical plants
• Onshore oil and gas terminals
• Gas transmission (LNG)
• Utilities and wastewater

BLUETOOTH CONNECTIVITY

• Optional BLE app for configuration and maintenance plain text on the full colored display
• Information is presented in an easy to read and understand format with call-to-action instructions
• No need to refer to the manual

GLOBAL APPROVALS

• European, US and Canadian
• Compliant with and certified to ATEX, UL and CSA standards

GD-70D-PH3-AH GD-70D Smart Transmitter, PH3 (phosphine), 0-1.00 ppm, AH Sensor by RKI Instruments

RKI Instruments has been making high quality gas detection and monitoring units for over 15 years. With an emphasis on safety and reliability, RKI Instruments excels at providing the best products in gas detection and sensor technology on the market. Every year, RKI strives to improve its product offering and scours the globe for the latest technologies and innovative designs. With the introduction of the GD-70D Series Intelligent Gas Detector, employers and workplace safety managers can feel confident that they have purchased a reliable detector that is built to last.

GD-70D Series Intelligent Gas Detector

The GD-70D Series Intelligent Gas Detector is a new smart gas detection transmitter that monitors combustibles, oxygen, and a wide range of toxic gases. The unit can be used as a standalone device, integrated with other PLC systems, or integrated with RKI's Beacon series of single and multi-channel controllers. Its common platform integrates numerous detection methods and requires very little maintenance.

Exclusive Features

The plug and play intelligent sensors make for easy setup and calibration by internally retaining calibration and sensor data. This allows workers to replace sensors while in the field without the need to reprogram the equipment. For little maintenance and optimal reliability, the internal technology automatically adjusts for long-term zero and span drift. The pump flow is also self-tuning for low maintenance functioning. In general, the smart sensors use electrochemical cell detection, semiconductor detection, pyrolysis-particle detection, galvanic cell detection, and catalytic combustion detection.

The GD-70D Series features a large LCD display that easily reads all notifications and provides a color coded graph for alarm status (first and second alarms are red, and fault alarms are yellow). The LCD screen displays the pyrolyzer connection, gas concentration, detection unit of measurement, the detected gas, the maintenance status, sensor identification, the flow rate, a graph of gas concentration, error codes, and alarm points. All operational settings are completely user adjustable from the front panel. The unit also has a self-diagnosing function which detects sensor trouble and system failure. The Intelligent Gas Detector has a convenient troubleshoot feature through its firmware. This allows users to investigate and resolve their own equipment issues while minimizing maintenance costs.

Specifications

The Intelligent Gas Detector is a convenient size for workplace and wall space efficiency with dimensions of 2.8 D x 4.7 H x 5.9 D and weighs approximately 2 pounds. It can be mounted to a wall easily with a base plate and 2 or 3 screws. Sensor replacements and pump replacements can be performed quick and easily without tools.

*Please note we can only ship RKI products to customers within the United States

PFM126P13 12" Direct Drive Poly Exhaust Fan, Poly Blade, Poly Shutter, 1 / 3 Hp by Schaefer

If you need a robust and versatile solution for exhausting moderate amounts of air at a reasonable price, look no further than Schaefer polyethylene exhaust fans. These high quality fans are built with rugged polyethylene housings, TEAO motors and polypropylene fan blades for exceptional durability and long life.

Schaefer polyethylene exhaust fans provide an energy efficient and cost effective solution for exhausting air and moisture from a diverse range of facilities including warehouses, garages, greenhouses and more.

Features and Benefits:

• Polyethylene construction for corrosion resistant and effortless cleaning
• Energy efficient, maintenance free motor for both time and money savings
• Direct drive
• Motor and blade combination designed for best-in-class performance
• Integrated PVC or aluminum shutters
• Designed to be flush mounted with interior walls up to 10" thick for use in a broad range of facilities
• Ships fully assembled for ease of installation
• 25 year housing warranty
• Two year product warranty
• Made in the USA

M-700000 Manning AirScan IRF9 Transmitter, R22 0-3,000 ppm, ATMOS, super heat, stainless steel enclosure by Honeywell Analytics

The industrial refrigeration industry is changing rapidly. The manufacture of R-22 and other HCFCs are being phased out. Influential organizations such as EPA and CARB (California Air Resources Board) are enforcing lower level monitoring requirements. Manufacturers of cooling systems are introducing new equipment that runs on 407a, 422d, 410a, HFO-1234yf, NH3 and CO2. In step with these changes, EPA fines have escalated for anyone venting ozone-depleting gases. What's your best move? Contact Honeywell Analytics to learn how to detect for these new refrigerants. With Honeywell Analytics, you can green the environment—and green your bottom line.

Honeywell Analytics Infrared monitoring solutions are designed to help your plant operate more efficiently and cost effectively. Unlike sample draw systems which take longer to pinpoint a gas leak, our diffusion sensing technology cuts downtime and the cost of expensive refrigerant replacement. Other technological advantages include flexible standalone or networkable configurations, long operating life expectancy (10+ years); fewer calibration requirements; self-monitoring SensorCheck technology; EPA compliance including newer requirements set by CARB (California Air Resources Board); and accurate, reliable response to the most common refrigerant gases used in industrial or commercial processes.

Refrigerant Specific

• Rapid response to refrigerants including R-404a, R-22, R-507a, R-134a, R-407a, R-410a, R-422d, HFO-1234yf, NH3 and CO2
• Internal monitoring of 4/20 mA loop circuitry continuously
• Compliant with new monitoring standards set by CARB

Diffusion-Design Sensor

• Has no moving parts and doesn't require pumps or filters
• All points of detection can be monitored continuously at an affordable cost

Versatility

• Can be used with any Honeywell Analytics readout
• Standard range of 0-3,000 ppm, can be rescaled for lower trip points
• Provides a linear output of 4/20 mA as a function of refrigerant concentration
• Simple, real-time calibration eliminates maintenance downtime
• Automatically adapts to fluctuating temperatures

Long-Lasting Performance

• Unique internal reference channel compensates for dust particles, source degradation, humidity and temperature fluctuation, food odors, chemical cleaners, etc.

ATMOS™ Technology

• Allows for operation down to -60°F and in condensing humidity environments or during washdown
• Automatically adapts to its environment and provides accurate and reliable performance under the harshest conditions

SensorCheck™ Technology

• Checks operating parameters of sensors and sends a notification output signal if an anomaly is identified
• Tests the sensor every 24 hours for electrical viability
• Indication can be detected by a Manning gas monitor or PLC

Housing

• High-mass metal bench provides structural and thermal stability and greater immunity to vibration
• Superior EMI/RFI shielding

Applications

• Banana and Produce Rooms
• Beverage Plants
• Wineries and Breweries
• Confined Space Entry
• Food Processing
• Gas Bottling Plants
• Ice Rinks
• Product Coolers
• Rack Houses
• Refrigeration Systems
• Supermarkets

18524-62 Type T Thermocouple Probe Quick Dis-connector, with Mini-Connector, 18" L, .188 Dia, Grounded Junction by Digi-Sense

The temperature range is for the probe tip only. The handle material may be affected if the probe is rated higher than the handle depending on exposure time, application, and handle material. ABS handles are rated to 220°F (104°C); PVC handles are rated to 200°F (93°C); Stainless Steel handles are rated at 450°F (232°C); Mini Connectors are rated to 392°F (200°C)

• Ideal for measuring liquids, gases, or semi solids
• Designed with 316 Stanless Steel sheath
• Response Time: 1.2 - 5 seconds or greater
• Includes a stand alone female connector for instalation to a thermocouple extension cable
• Each probe comes with a color coded ANSI dual standard connector: type J-black, type K-yellow, type T-blue, and type E-purple.
• Custom designs or changes to this product are available upon request.

TW24B 24" Oscillating Circulation Fan, Black OSHA Guards by Schaefer

Geared for performance, Twister's oscillating motor utilizes highest quality metal gear design for unparalleled strength, greater load capacity and higher accuracy. Whether aimed at a workstation using a standard wall mount or down an aisle or assembly line using a pedestal, Twister provides the versatility and performance needed to improve worker productivity and safety.

The fans meet OSHA safety regulations while delivering maximum air flow in a wide range of hazardous location applications.

Features and Benefits

• Schaefer oscillation technology
• 2-speed high efficiency motor with 10 foot cord
• OSHA compliant guards, available in black or white
• 90° of total oscillation
• 45° of fan head adjustability up or down
• Four sizes 20", 24", 30" and 36" for optimizing air flow needs
• Low noise levels, quieter than conversational voice
• Fixed or portable mounting capabilities
• Two year warranty
• Assembled in the USA

GS-AH-A-066-G Gasman Single Gas Monitor, 0-500ppm Carbon Monoxide, Rechargable Battery, English Safe Area only by Crowcon

For over 40 years, Crowcon Detection Instruments has produced state of the art gas detection devices for personal and industrial use. Building upon their reputation for reliable and innovative gas monitoring products, Crowcon introduces the Gasman personal gas monitor. Its lightweight and compact design is convenient for jobsites where workers need not be weighed down by excessive bulk and equipment. The unit conveniently clips to a pocket or helmet and operates continuously.

The Gasman personal gas monitor has numerous convenient features such as:

• One button technology
• Backlit LCD display
• Durable polycarbonate casing
• Quick response triple alert system
• Compact and lightweight design

Easy to Use

The Gasman s true one button technology is an ideal and simple design. The large glove friendly button is mounted on the front of the unit for easy access and controls all of the unit s programmable features. Also on the front, the Gasman s easy to read backlit LCD screen indicates gas readings and the battery status. The simple screen provides a clear indication of the unit s operation status. It will also alert the user 30 days in advance of when a calibration test is due. With a simple and intuitive design, Crowcon has produced a gas detector that reduces the complexities of workplace safety, and ensures workers in a straightforward manner that their equipment is on and operational.

Triple Alarm System

This portable single gas detection system features a triple alarm system that is sure to alert the user and anyone in the vicinity. The visible alarm utilizes a dual red and blue flashing LED light, and the unit houses an internal vibrating alert system. These two indicators allow for visual recognition in loud environments and working conditions. The alarm system also features a programmable audible alarm at 95 decibels. The unit is capable of a variety of alarm tones, and users can select which tone may be best for the individual workplace setting. The triple alarm system with multiple sensory indicators is sure to be noticed in almost any work environment.

Specifications

The Gasman single gas monitor is lightweight and compact, weighing less than 135 grams and with dimensions of 90 x 48 x 24 mm. The unit is available with a wide variety of gas sensors which feature various detection and alarm levels. The unit also features a quick response time of 20 seconds for flammable and toxic gases or 10 seconds for oxygen. Its datalogging feature has approximately 900 hours of storage and all events are time stamped. The battery life for this unit is incredible with 12 hours of runtime on a Rechargeable battery battery or up to 2 years on a non-Rechargeable battery.

MX6-KAC3R211 MX6 iBrid Multi-Gas Monitor, LEL (Pentane), HCl, H2, O2, PID, Lithium-ion Extended Range Battery, UL/CSA/ATEX/IECEx, Pump, English by Industrial Scientific

The MX6 iBrid® is more than an intelligent hybrid of Industrial Scientific's best monitoring technologies—it's the most adaptable six-gas monitor on the market. With hundreds of possible sensor combinations, and a robust list of available configuration settings, the MX6 iBrid is ready to monitor oxygen, toxic and combustible gas, and volatile organic compounds (VOCs).

As your work changes, so can your MX6 iBrid. It uses five sensor slots to detect up to six gases. Each of those sensor slots accepts a variety of sensors, which means you can use the instrument with a PID sensor one day and an infrared sensor the next. What's more, settings allow you to adapt the instrument's behavior for your application. If you need to use a benzene PID response factor for one application, and butadiene for others, the familiar menu structure will allow you to quickly change settings.

The rugged MX6 iBrid carries our Guaranteed for Life™ warranty and is compatible with DSX™ Docking Stations. With a DSX Docking Station, maintenance is simplified and data becomes more than a spreadsheet filled with logged readings. Proactively manage your gas detection fleet—track trends, know when instrument maintenance will be required, and understand how your MX6 iBrid instruments are being used.

• 24 "Plug-and-Play" field-replaceable sensors including PID and Infrared options
• Up to 6 gases monitored simultaneously
• Simple, user-friendly, customizable, menu-driven navigation
• Five-way navigation button
• Durable, concussion-proof overmold
• Optional integral sampling pump with strong 30.5 meter (100 feet) sample draw
• Full-color graphic LCD is highly visible in a variety of lighting conditions
• Powerful, 95 dB audible alarm