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SPXCDUSNH2RM Sensepoint XCD RTD Transmitter, Hydrogen Sulfide (H2S) 0-50 ppm, Stainless Steel Enclosure, Modbus by Honeywell Analytics

Sensepoint XCD RTD from Honeywell Analytics makes it easy on your maintenance team, time and budget when faced with the challenge of monitoring toxic gases in Class I, Div 2 areas.

You can mount the unit up to 100 feet from the transmitter to obtain maximum gas detection coverage in areas not easily accessible or where the sensor would not be visible, as in high-or low-level concealed areas, or detection outside the room being monitored. XCD RTD offers unrivaled flexibility and performance via its easily recognizable display (traffic light pattern) to convey safety status, communication and mounting options, and onboard diagnostics.

Get More Return on Investment from the Practical Advantages of XCD RTD. Sensepoint toxic and oxygen sensors detect a wide variety of industrial gases at common measuring ranges, adding flexibility to your gas monitoring program, reducing your parts procurement costs and expanding your safety net.

Remote gas monitoring has never been this easy and cost-effective. Mount the sensor as shown in the illustration and view gas safety status via the large tri-color display on the transmitter, up to 100 feet away from the sensor. The advantages of this remote monitoring system are added safety, and reduced time spent on maintenance. There's no need for your team to climb ladders or bring in specialized equipment to view gas concentration readings or to conduct a safety audit. What's more, the removable sensor design of Sensepoint XCD RTD cuts downtime and eliminates the need for specialized training.

Reduce Cost of Ownership Over Life of the Product

• Cut stocking and procurement costs with a common transmitter platform
• Reduce maintenance time and expense with non-intrusive, one-man operation
• Simplify maintenance with plug-in, removable sensor
• Reduce inspection and training time with tri-color 'traffic light' display conveying safety status at a glance
• Simplify set-up and configuration with non-intrusive magnetic switches

Gain Added Flexibility, Reliability and Performance

• Extend gas sensing element up to 100 feet (30 meters) from transmitter; mount in the most difficult to access areas
• Reduce likelihood of human error via on-board diagnostics and easy-to-read display
• Protect against dust/water ingress with IP66/67 rated stainless steel or aluminum enclosure
• Prevent false alarms with auto-inhibit during maintenance
• Select sink or source 4-20mA output; integral or remote configuration
• Full range of accessories and purchase options let you choose the remote monitoring system that's right for your application

SX-A Wind Speed Anemometer by Agrowtek

High quality wind speed anemomter sensor for SXW weather station transmitters. Made in USA.

• 0 - 125mph
• 25ft Cable
• Mounting Bracket

72-FA-B-B GX-Force Portable 4 Gas Monitor, LEL/Oxy/CO/H2S, 12VDC car plug adapter, USB cable, belt clip, rubber nozzle by RKI Instruments

With the GX-Force, you have multiple tools in one instrument. Having 2 operating modes, the GX-Force can be used for confined space, safety monitoring in its Normal Operating mode. A Leak Check mode is the solution for all leak investigations.

The GX-Force is RKI's smallest personal 1-4 gas monitor with a strong built-in sample pump capable of a 100' sampling range. Weighing only 9.8 ounces, the GX-Force can monitor the standard confined space gases (LEL combustibles, Oxygen content, Carbon Monoxide, and Hydrogen Sulfide). Built around high-quality micro-sensor technology, which are compatible with the GX-3R, GX-3R Pro, 04 Series, and Gaswatch 3 instruments.

The GX-Force's large LCD display shows all gas readings, battery level, current time, and will automatically backlight in alarm conditions. Standard alarm types include vibration, visual, and audible alarms, which can be set to latching or non-latching. Controlled by a microprocessor, the GX-Force continuously checks itself for sensor connections, low battery, circuit trouble, low flow, and calibration errors. The GX-Force operates 30 hours on a Li-ion battery.

Calibration and bump test intervals and reminders are user adjustable and can be set to either go into alarm or to lock the user out of normal measurement mode once a calibration period has expired. Calibrations can be performed automatically or individually in single calibration mode. Calibration can be done individually or in a group.

Features

• 2 Operating modes: Normal and Leak Check
• Internal sample pump with 100' sample range
• 30 hours of operation (Lithium-ion battery)
• Easy to grip lightweight design: 2.5" W x 6.81" H x 1.85" D, 9.87 ounces
• Water and dust resistant design, IP67
• Field replaceable sensors & filters
• Impact resistant body
• Intrinsically safe
• Large LCD Auto-backlit display
• 3 Year warranty

Applications

• Personal monitoring
• Confined spaces
• Refineries/petrochemical
• Utilities
• Oil and Gas
• Water/wastewater
• Fire services
• Construction

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

Old Part Number: HP101650
New Part Number: H101650PA

CPD-W6X1S3M1-Y-00 BW Flex Multi-Gas Detector, %LEL(F), Oxygen (O2), Sulfur Dioxide (SO2), Carbon Monoxide (CO), Yellow by BW Technologies

Whether you're protecting workers or first responders — in industries from steel and wastewater to paper and pulp — Honeywell BW™ Flex delivers the flexibility you need. Choose from more than 15 sensors to simultaneously detect up to 4 gas hazards.

REAL-TIME GAS READINGS AT A GLANCE

Honeywell BW™ Flex features a large high-resolution display with readings available in a wide range of languages. Vital safety information is conveyed clearly and effectively, enabling faster decision-making to protect lives in hazardous environments. Its innovative design, compact size and ease of use builds on the legacy of Honeywell BW™ gas detection products.

INTELLIGENT SENSORS FOR INCREASED SAFETY & UPTIME

Honeywell BW™ Flex incorporates i-Series intelligent sensors which monitor sensor status and provide advanced predictive calibration, maintenance and end-of-life information in real-time. These advanced alerts help reduce the likelihood of failure and increase awareness so preventive action can be taken to avoid safety incidents and unexpected downtime.

SIMPLIFIED GAS REPORTING AND ANALYSIS

Honeywell BW™ Flex can be paired with a smartphone easily via Bluetooth®. Download the Honeywell Safety Suite Device Configurator app for quick and precise device management, maintenance, reporting and analysis. Increase productivity by simplifying tasks like recording incidents and save time with one-click download for all instrument data.

FEATURES AND BENEFITS

• RELIABLE: Two months of battery runtime on a 4.5-hour charge with our new lowpowered IR LEL sensor. No daily charging, no unexpected downtime.
• COMPATIBLE: The Honeywell BW™ Flex Series is compatible with the IntelliDoX instrument management system and Honeywell Safety Suite using Bluetooth® for wireless configuration.
• ACCURATE: Low-power infrared LEL sensor is immune to silicone poisoning, which means accurate monitoring of combustibles.
• EASY TO MANAGE: The IntelliFlash™ green light indicates when the detector is in compliance and the amber light indicates the need for maintenance.
• RESPONSIVE: 1series sensors respond to dangerous gas levels in seconds, even in harsh temperatures.
• EASY TO USE: Small, lightweight and wearable. One-button operation.

Part Number: CPD-W6X1S3M1-Y-00

GS-AB-A-075-G Gasman Single Gas Monitor, 0-100% LEL Propane, Rechargable Battery, Australian 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.

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

K-7904 Peracetic Acid - CHEMets® Visual Kit, 0-1 & 0-5 ppm by AquaPhoenix

The Peracetic Acid CHEMets® test kit (0-1 & 0-5 ppm) comes in a plastic case and contains everything needed to perform 30 tests: Refill (R-7904), Low and High Range Comparators (C-7902 & C-7904), Activator Solution (A-2500), 25 mL sample cup (A-0013), and instructions.

Test Method:

ThePeracetic Acid CHEMets® Test Kit (0-1 & 0-5 ppm) employs the DPD chemistry. The sample is treated with an excess of potassium iodide. Peracetic acid oxidizes the iodide to iodine. The iodine then oxidizes DPD (N,N-diethyl-p-phenylenediamine) to form a pink colored species in direct proportion to the peracetic acid concentration. Various oxidizing agents such as halogens, ferric ions and cupric ions will produce high test results. Hydrogen peroxide does not interfere with this test if present at levels comparable to the peracetic acid levels.

BZ1-0220001111 Radius BZ1 Area Monitor, H2S (DualSense), Pump, UL/CSA, LENS Wireless, 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

XNX-UTAV-MNNNN XNX Universal Transmitter, UL 3/4 AL MDBS FOR MV SNSR by Honeywell Analytics

XNX Universal Transmitter, ATEX M25 AL FF HRT FOR TOX/O2 SNSRThe XNX Universal Transmitter, now with HART EDDL, marks a new turn in gas detection from Honeywell Analytics. It supports the widest range of sensors on a common platform and offers a modular choice of inputs and outputs.

XNX is designed for flexible integration, simple installation, user-friendly operation and straight-forward maintenance. It is ideal for use with a range of gas monitoring controllers or industry standard PLCs. The introduction of our HART Enhanced Device Descriptor Language (EDDL) software provides users with an at-a-glance indication of the health of their gas detectors in the field.

Bringing together the best solutions in gas detection

Electrochemical

• Proven electrochemical sensing technology
• Surecell™ electrochemical cells are ideal for hot and humid environments
• Long life sensing cells (typical >2 years)
• Patented 'Reflex' sensing element verification diagnostics
• Sensor recognition software auto configures transmitter
• Plug and play factory configured sensors
• Intrinsically safe sensor connection permits hot swap, reducing down time

Catalytic Bead

• Supports Honeywell Analytics 705, 705HT, Sensepoint, Sensepoint HT and MPD sensors
• Fast response to wide range of hydrocarbons and flammables

Infrared (Open Path IR, Point IR, IR Cell)

• Supports Honeywell Analytics Searchline Excel, Searchpoint Optima Plus
• Failsafe operation
• Fast speed of response
• Reduced routine maintenance
• Immune to catalytic poisons
• Long operating life
• Works in inert atmospheres

High performance

• Flammable gas detection 0 to 100% LFL/LEL
• Point IR with heated optics provides immunity to poisoning and no hidden faults
• Open-path IR flammable gas detection in LEL-m measurement
• Electrochemical cell offers toxic gas detection in ppm
• IR cell provides CO₂ and combustible gas monitoring
• Robust and reliable operation in explosive areas and harsh environments

Flexible Operation

• 3 versions - supports (Catalytic Bead and IR Cell), Electrochemical Cell and IR (point and open-path) gas detection
• Multi-Purpose Detector (MPD) with field serviceable mV, Catalytic bead and IR Cell capability
• 4-20mA with HART® as standard
• HART Enhanced Device Description Language (EDDL) software*
• Multiple communications options include up to 3 relays, MODBUS® and FOUNDATION® H1 Fieldbus
• Optional local IS port for handheld HART configurator

Easy to Use

• Large, backlit, easy-to-view LCD display offers multisensory indicators (visual icons, colored buttons, text, etc.) to display gas and sensor readings
• User interface supported by 8 selectable languages (English, Spanish, German, Italian, Portuguese, French, Russian, Chinese)
• Self-test and fault indication features
• Non-intrusive, one-man operation
• Quick calibration with auto-inhibit

Easy to Install

• 3 or 4 wire operation, source, sink or isolated
• Simple plug-in sensors and replaceable cells
• NEMA 4X IP66 rated for rugged indoor/outdoor use
• Five conduit entries for ease of installation

Cost Effective

• Minimal training required
• One-man operation
• Plug-in sensor replacement
• All necessary accessories included

PH60-VS pH Meter Tester Kit for Viscous Liquid with LabSen 855 ATC pH Electrode by Apera

Discover the next level of precision, reliability, and portability with our top-rated professional PH60 tester, now paired with the Swiss LabSen 855 Pre-pressurized pH/temp. electrode. This powerful combination revolutionizes pH measurement, in highly viscous liquid samples such as cosmetics, skin care products, paints, coatings, glues, slurry, honey, resin, etc. The electrode also works well in general water solutions. Elevate your pH measurement experience with our comprehensive test kit that leaves no detail unaddressed. This all-inclusive kit not only includes ready-to-use calibration buffer solutions (4.00/7.00/10.01) and soaking solution but also features the Apera CalPod Solution Organizer for optimizing your calibration process. All components are conveniently housed in a rugged carrying case, ensuring that you can effortlessly perform reliable pH measurements and calibrations wherever you go.

• PORTABILITY + RELIABILITY — The top-rated professional pH tester is now paired with the Swiss LabSen 855 ATC pH electrode, allowing you to effortlessly take lab-grade pH measurement even in highly viscous liquid samples such as cosmetics, skincare products, paints, coatings, slurry, glues, honey, resin.
• SWISS SENSOR TECH mdash; Crafted with Swiss sensor technology and premium materials, LabSen 855's pre-pressurized long-life reference system eliminates the common issue of junction clogs when testing viscous samples, ensuring a quick response and extends the electrode's life.
• ROBUST MEMBRANE mdash; LabSen 85' s HA membrane is engineered for minimizing alkaline error in high salinity and complex liquid samples.
• INTELLIGENT METER BODY mdash; The water-resistant meter body is featured with intelligent functions such as Automatic Calibration, Auto. Temperature Compensation, Reading Alarm Settings, Automatic Reading Lock, and more to meet your precision needs.
• COMPLETE TEST KIT mdash; not only includes ready-to-use calibration buffer and soaking solutions, but also features the Apera CalPod Solution Organizer for optimizing your calibration process.

G460-1D03220010 G460 Multi-Gas Detector with standard sensors (O2, cc LEL, COSH, PH3), Alkaline battery by GfG

For over 50 years, GfG Instrumentation has worked to develop the most reliable and effective equipment for gas detection and measurement technology. Developed by a team of highly experienced scientists and specially trained engineers, GfG products are high quality reliable instruments designed to meet the unique needs of potentially hazardous worksite. With the introduction of the G460 Multi-Gas Detector, GfG Instrumentation is continuing the trend.

G460 Multi-Gas Detector

The G460 Multi-Gas Detector is a compact and robust system with the capabilities of detecting up to six different gases and simultaneously displaying the readings. The portable detector features a user friendly and intuitive interface to simplify the day to day operations.

Ease of Use

For typical daily operations, the G460 Multi-Gas Detector operates with a single button. The complete user interface can provide access to advanced setup options with three buttons. The unit also features easy calibration operation. Simply attach the calibration adapter and apply gas. The G460 will automatically perform the appropriate adjustments. The detector will then store the dates of the three most recent calibrations for each sensor.

The G460 also features a large easy to read tricolor display which uses a color code to indicate the alarm severity. From green to orange to red, the tricolor display is intuitive and incredibly user friendly. The display feature can also flip or zoom with the touch of a button. The G460 multi-faceted alarm system also includes an ultra loud audible buzzer at 103 dB, a standard vibration mechanism, and 360 bright LED alerts (the LED alerts can also be equipped to function as flashlights). This multi-faceted system is sure to alert users and those nearby of the potential hazardous conditions. For smooth and continuous operations, the G460 Multi-Gas Detector uses interchangeable alkaline and rechargeable battery packs that provide up to 25 hours of continuous operation. Using a drop in cradle charger, the rechargeable pack can completely recharge in less than 4 hours.

G460 Multi-Gas Detector Features

The G460 Multi-Gas Detector features a motorized pump with a built-in diffusion or sample draw mode switch. The hose is easily attachable and can draw from 100 feet away. The hose is powered by its own battery pack that provides 20 hours of continuous operation. The multi-gas detector also features the widest range of sensors on the market. The compatible long lasting (and interchangeable) smart sensors include LEL, SO2, O2, H2, H2S, NO, CO, O3, HF, NH3, CIO2, CI2, PH3, ETO, HCN, and NO2. Users can purchase additional sensors to help customize the unit such as infrared sensors for the measurement of CO2 and photoionization sensors for volatile organic chemical hazards. The G460 has standard data logging capabilities that store up to 55 hours of the most recent activities. Alarm activations gas thresholds and stored permanently in the internal memory. Employers can download all internal information to generate reports and monitor results.

6150-1107 MGD-100 Gas Detection System, R410a: 0 - 1,000 ppm, 4 Sensors, 2 Alarms, Standard Housing, 110 VAC by Bacharach

Bacharach's MGD-100 Series is a robust and scalable gas detection system used for reliable real-time monitoring of refrigerant, combustible, and toxic gases. It's a stand-alone system that alarms when pre-set thresholds are exceeded. The MGD-100's alarms are monitored by a centralized controller, which can alert personnel of potential hazardous conditions via an onboard buzzer and LED alarm indicators.

MGD-100 Systems can be configured from single-sensor, one-alarm level systems to larger scale systems consisting of 6 sensors with 2 alarm levels. This flexibility allows the platform to be used for both small and large systems.

Ideal for Chiller Rooms, Supermarkets, Brewing and Bottling Facilities, Industrial Refrigeration, Arenas, Food Storage and Processing Facilities.

Features & Benefits:

• Stand-alone, out-of-the-box solution with quick and easy installation - the most cost-effective system available.
• Fast-response sensors detect leaks quickly, which minimize refrigerant gas usage and environmental impact.
• Infrared (NDIR) CO2 detection
• Long-life semiconductor sensors for detection of all refrigerants, ammonia, halocarbons, combustibles & VOCs
• Robust design allows units to be placed directly in areas where detection is needed.
• Available in a variety of housings, including IP66 and duct mount.
• Select from 1, 2, 4 or 6 remote sensors and 1 or 2 pre-set alarm levels, which can be connected to BMS systems.

T4-HOCA-US T4 Personal Gas Monitor, 4 Gas - H2S, O2, CO, CH4 % LEL, Alternate Alarm Levels / Certifications by Crowcon

T4 integrates innovative safety features and an intuitive, rugged design to provide advanced protection for those working in harsh environments. This portable multigas detector, which is exceptionally easy to use and service, protects against the four most prevalent gas hazards: carbon monoxide (CO), hydrogen sulphide (H₂S), flammable gases and oxygen (O₂) depletion.

Features

• TWA resume function - unique to T4, this innovative feature ensures toxic gas exposure is calculated accurately over an entire shift, even if T4 is switched off for a break or during travel to another site.
• 18 hour battery life - safely work multiple or longer shifts between charges, covered by the 18 hour battery life.
• Backlit display - large, clear display with backlight and option to flip the screen 180° for easy viewing while worn.
• Rugged design - with a thick anti-shock rubber casing and drop-tested to 13.1 feet on concrete, T4 provides dependable operation under the most demanding use.
• Water & dust-resistant to IP65 & IP67 - provides protection in the harshest environments.
• Dedicated sensors - one sensor for every gas ensures effective, fast and reliable detection.
• Positive safety indicator - a simple 'traffic light' status indicator which, at a glance, provides visual assurance of operational and compliance status to both users and supervisors. Green light - Working safely. Red light - Attention required
• Intrinsically safe - ATEX approved and UL Class 1 Div 1 for safe operation in a wide range of hazardous environments.
• Multiple alarms - audible 95dB alarm, bright red/blue LED's and vibrating alerts provide effective warning to gas hazards.
• Easy operation - large single button and intuitive menu system minimize training and allow easy operation while wearing gloves.

726-140-ID Eagle 2 Portable Monitor, LEL(CAT)/CH4(IR Autoranging %LEL)/Oxy/H2S/CO/SO2, internal LEL cat dilution by RKI Instruments

Continuing in its legacy of durable and reliable gas detection and monitoring systems, RKI Instruments is proud to offer a new product in its popular Eagle portable gas detector series. The Eagle 2 can monitor up to 6 different gases and is equipped with several exclusive features that can only be found with the Eagle series. In addition, its large glove friendly push buttons and LCD screen ensure an ease of use when onsite. Rated intrinsically safe, the Eagle 2 is equipped with state of the art technologies that are not available with other competitive gas detectors and monitors.

Specialty Sensors

The Eagle 2 has a variety of available specialty sensors. Workers can use a photoionization detector for low or high range VOC detection and Fence Electrode Technology for humidity and contamination resistance. An infrared sensor is available for Co2, % LEL CH4, % Volume CH4, % LEL HC, and % Volume HC. Thermal conductivity sensors are available for % Volume H2 and % Volume CH4. The unit is also compatible with the smart plug and play toxic sensors for the detection of NH3, AsH3, CI2, HCN, PH3, and SO2. With the wide variety of sensors and gas detection available, the Eagle 2 can be customized to meet almost all worksite gas detection needs.

Exclusive Features

The monitor has a long internal pump that can draw samples for up to 125 feet. The pump features a low flow auto shut off and alarm. This allows operators to respond swiftly from a safe distance. The unit is multilingual with 5 different language preferences, and features an alkaline battery life of 18 hours or a NiMH life of 20 hours. To protect the integrity of the device and the configurations, the unit can be password protected. The Eagle 2 also has standard data logging capabilities for easy research, evaluation, and site monitoring. To reduce calibration costs and time, the unit features an automatic calibration option and a single gas calibration option.

The Eagle 2 is heavily protected from environmental conditions by a weather proof, chemical resistant RFI/EMI coated high impact polycarbonate/PBT blend enclosure. The enclosure also renders the unit water and dust resistant. Because of the enclosure, the Eagle 2 can function in 2 inches of water without leakage.

Eagle 2 Specifications

The portable and durable unit is lightweight at less than 4 pounds. Its dimensions are suitable for convenient carrying (9.5 L x 5.25 W x 5.875 H), and it features a conveniently placed durable top handle. The large easy to read display has a polyurethane overlay backlights on demand and when the alarm is activated. The 2 alarm channels are fully adjustable for the user and can be password protected. With a 95 dB buzzer and 4 high intensity LEDs, the alarm is sure not to be missed. The Eagle 2 is standard with a 2 year warranty for material and workmanship and a 1 year warranty for PID sensor.

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

Measuring Range: 0 to 100.000 Lux 0 to 300 Hz

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