$400 - $500

610-0114-000 Three-Gas Calibration Mix (CO 50 PPM / CH4 50% LEL (2.5% VOL) / O2 20.9%, Balance N2), 116 Liters by RAE Systems

Green cylinder technology not only saves the environment, it also saves time and money.

• Gas cylinder size options 34, 58 and 116 liter
• Green Refillable cylinder
• "Strip and Ship" program for easy return of empty cylinders
• Small cylinder footprint
• Cylinder technology offers exceptional gas stability
• All gas cylinders use the same valve

18109162-3012 Ventis Slide-on Pump Base, Alkaline battery pack, Black, UL/CSA, Czech /Italian /Polish /Portuguese /Russian by Industrial Scientific

The Ventis® Slide-on Pump is ideally suited for operators who wear their gas monitors 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 Monitors.

18109162-3091 Ventis Slide-on Pump Base, Alkaline battery pack, Black, INMETRO, English /French /Spanish /German /Chinese by Industrial Scientific

The Ventis® Slide-on Pump is ideally suited for operators who wear their gas monitors 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 Monitors.

18109162-3112 Ventis Slide-on Pump Base, Alkaline battery pack, High Visibility Orange, UL/CSA, Czech /Italian /Polish /Portuguese /Russian by Industrial Scientific

The Ventis® Slide-on Pump is ideally suited for operators who wear their gas monitors 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 Monitors.

6302-0164 MGS-410 Gas Detector - IP66, Modbus Output, Audible & Visual Alarms - R454A, 0-1,000ppm, Semi-conductor by Bacharach

Bacharach's MGS-400 Gas Detectors makes compliance with mechanical equipment room and refrigeration safety codes simple and easy, saving time and money on equipment and installation. Using the MGS-400 App, users can intuitively use, commission and maintain their gas detection system without the need for specialty training or tools. Pre-calibrated sensor modules simplify maintenance, take minutes to exchange and do not require the use of calibration gas. The MGS-400 sensors can trigger additional audio-visual alarms and act as a standalone gas detection system, or integrate easily into a BMS / BAS or with Bacharach's optional MGS-408 Gas Detection Controller.

Features

• Mobile App Interface
• Pre-calibrated Sensors
• Semi-automated Calibration
• Remote Sensor Option
• Temperature-Compensated Measurement
• Low Temperature Performance
• Digital Communications
• Analog Outputs
• Relay outputs
• Audio & Visual Alarms
• Multiple Cable Entries and Terminals

Benefits

• Quick, easy and intuitive commissioning, configuration and maintenance requires no special training. No tools required to set alarm levels and behavior
• Fast and easy sensor maintenance. Eliminates need for calibration gas.
• Easy calibration process with mobile app. Generate calibration certificates for documentation.
• Locate the sensor element in hard-to-reach areas and the base unit where convenient for electrical and communication wiring (MGS-460)
• Mitigates false alarms and optimizes accuracy in refrigeration applications.
• Suitable for use in cold rooms and freezers down to -40° F/C.
• Integrate with local BMS/BAS via Modbus RTU
• For current or voltage output to legacy systems (MGS-450/460)
• 3 relays available for alarm and fault events to active horn/strobes and ventilation (MGS-450, MGS-460)
• On-board alarm notification supports compliance with ASHRAE 15 / EN 378
• Quick and easy installation of all wiring; daisy-chain power and digital communications.

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

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

PH8500-MS Portable pH Meter for Micro Samples with Data Logger by Apera

The Apera Instruments PH8500-MS Portable pH Meter is designed for professional pH measurement in test tubes and small liquid samples (>0.2mL). The equipped Swiss LabSen 243-6 3-in-1 pH/Temperature Electrode adopts a Long-Life reference system, and a unique cylindrical semi-micro sensor, making precise small sample pH measurement easier than ever.

The meter has a ±0.01 pH accuracy in a range of 0-14 pH, and Temperature Range: 0 to 100°C (32 to 212°F), Auto Calibration with auto-recognition of up to 12 kinds of buffer solutions, Auto. Temp. Compensation, and supports stable reading/auto-hold display mode. The meter's digital filter technology improves response time and accuracy.

Intelligent Functions: Smart Self Diagnosis reminds of out-of-range measurement, incorrect calibration, and electrode invalidation. Other functions include calibration reminders, calibration date checking, easy parameter setting. GLP standard data management, 500 data sets of storage, manual/auto storage, USB data output

Reliable Structure Design: Large white backlit LCD; foldable stand allows use as a benchtop meter; soft silicon case gives you a nice firm grip; connector protection cap, IP57 waterproof rating; Powered by 3 AA batteries. The meter is RoHS and CE certified and comes with a 2-year warranty (6 months for the electrode).

• Equipped with LabSen® 243-6 Glass pH/Temperature Electrode, designed for pH measurement of semi-micro samples (>0.2mL)
• Intelligent Functions: Self-Diagnosis of out-of-range value and electrode invalidation, calibration reminders, calibration date checking, clock display, easy parameter setting
• GLP standard data management, 500 data sets of storage, manual/auto storage, USB data output
• Reliable Structure Design: Large white backlit LCD, soft silicon case gives you a comfortable grip, IP57 waterproof rating
• Powered by AAA batteries; the foldable stand also allows use as a benchtop meter

22461 StarSense Explorer DX 130AZ Smartphone App-Enabled Newtonian Reflector Telescope by Celestron

Celestron has reinvented the manual telescope with StarSense Explorer—the first telescope that uses your smartphone to analyze the night sky and calculate its position in real time. StarSense Explorer is ideal for beginners thanks to the app's user-friendly interface and detailed tutorials. It's like having your own personal tour guide of the night sky.

Dock, Launch, Explore

Leave complicated star charts, imprecise planetarium apps, and computerized mounts behind. With StarSense Explorer, locating objects has never been easier, faster, or more accurate. Within minutes of setting up the telescope, you'll be navigating the sky with confidence. Simply place your phone in the unique StarSense dock and launch the StarSense Explorer app. After aligning your phone to the telescope's optics (a quick, 2-minute procedure), StarSense Explorer generates a list of celestial objects currently visible. Make your selection and arrows appear onscreen, guiding you as you to move the telescope. When the object is ready to view, the bullseye turns green.

Smartphone Compatibility

StarSense Explorer works with most modern smartphones, including iPhone 6 and up and most devices running Android 7.1.2 or later manufactured since 2016.

Patented StarSense Sky Recognition Technology

StarSense Explorer uses patented technology and your smartphone to determine exactly where the telescope is pointed in the night sky. A Lost in Space Algorithm (LISA), like the ones satellites use in orbit to correctly orient themselves, helps the app match star patterns it detects overhead to its internal database.

While other astronomy apps may claim that they can help you find objects, they rely exclusively on the phone's gyros and accelerometers, which aren't as accurate as LISA technology. No other app can accurately tell you when your target is visible in the eyepiece.

High Quality Altazimuth Mount with Slow Motion Control

An ultra-stable altazimuth mount provides a sturdy foundation for StarSense Explorer DX. Slip clutches and geared slow motion controls in both axes help you move the telescope smoothly and zero in your target. As celestial objects appear to drift across the night sky, you'll be able to follow them with just a few turns of the knobs. It's all anchored by an adjustable, full-height tripod.

Dazzling Views with High Quality Optics

With a large 130mm (5") objective lens, this telescope has enough light gathering ability to bring out impressive detail in celestial objects. You can expect sharp, bright views of Jupiter's four Galilean moons, its cloud bands and Great Red Spot, the rings of Saturn, the trapezium in the Orion Nebula, and beautiful Pleiades Open Star Cluster. Highly reflective coatings on both the primary and secondary mirror enhance the views even more.

Perfect for the City or Dark Sky Sites

Even if you live in a light polluted city location, StarSense Explorer is advanced enough to be able to pick out Jupiter, Saturn, Venus, the Orion Nebula, double stars, and a few more of the most famous celestial objects.

But if you can take the telescope to an even slightly darker location, more objects will become visible. With this 5" Newtonian and relatively dark skies, the Andromeda Galaxy, Hercules Open Star Cluster, and so many more are easily within your reach.

The entire telescope kit weighs just 18 pounds, so it's perfectly portable and easy to bring on your next camping trip or to a remote observing site.

Everything You Need to Observe Immediately

When you unbox your new StarSense Explorer DX, you'll find:

• 130mm Newtonian reflector optical tube
• StarSense dock for your smartphone
• Low powered (25mm) and high powered (10mm) eyepiece
• StarPointer red dot finderscope, perfect for using the telescope during the day or without the StarSense Explorer app
• Altazimuth mount with slow motion controls
• Full-height tripod with an accessory tray to keep you organized

• Unleash the power of your smartphone to take you on a guided tour of the night sky—no telescope experience required.
• Award-winning and patented StarSense sky recognition technology uses your smartphone to analyze star patterns overhead and calculate its position in real time.
• StarSense Explorer Powered by SkySafari™ app automatically generates a list of objects currently visible. View planets, brighter nebulae and galaxies, star clusters, and double stars from the city. Or take your telescope to darker skies to view faint, deep sky objects.
• Manual altazimuth mount with smooth, dual-axis slow-motion controls makes it easy to follow the on-screen arrows to your desired target. When the bullseye turns green, it's ready to view in the telescope's eyepiece.
• 130mm (5") Newtonian reflector with highly reflective coatings and enough light gathering ability to view all the best celestial objects.
• Includes 25mm and 10mm eyepieces, StarSense smartphone dock, a red dot finderscope (in case you want to use the telescope without your phone), and a sturdy, full-height tripod.

GS-KF-B-080-G Gasman Single Gas Monitor, 0-100% LEL Pentane (unfiltered), Non Rechargable Battery (single use), Portuguese ATEX 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.

VK12-CK - 12" Cattle Kooler Circulation Fan, Cord, Special Mount by Schaefer

Reduce heat stress and improve air quality with Schaefer's uniquely designed circulation fans. Unrivaled in the market, these fans are engineered to produce greater air movement and superior cooling no matter the application. You don't hear them. You don't see them. You only feel them!

Also known as Horizontal Air Flow (HAF) fans, these fans move air in a coherent horizontal pattern creating a gentle 'racetrack' air flow pattern needed in greenhouses to maximize heat distribution and humidity control by mixing the air, from ceiling to floor.

Features and Benefits

• Deep guard design for unmatched performance, low noise levels and safety without sacrificing airflow
• Matched high quality motors and blades for maximum efficiency
• Powder coated steel guards for increased durability and corrosion resistance
• Hot dipped galvanized guards on VK12-GA and VK20-GA models for even greater rust protection
• Powder coated steel mounting bracket and power cord included
• Wide variety of mounting options available for flexible and easy installation
• Variable speed controls available
• Misting kits available for even greater cooling
• Two year warranty
• Made in the USA

VKC36-3-O 36" Versa-Kool Circulation Fan, Chain Mount, 3-Phase, OSHA guard by Schaefer

Reduce heat stress and improve air quality with Schaefer's uniquely designed circulation fans. Unrivaled in the market, these fans are engineered to produce greater air movement and superior cooling no matter the application. You don't hear them. You don't see them. You only feel them!

Also known as Horizontal Air Flow (HAF) fans, these fans move air in a coherent horizontal pattern creating a gentle 'racetrack' air flow pattern needed in greenhouses to maximize heat distribution and humidity control by mixing the air, from ceiling to floor.

Features and Benefits

• Deep guard design for unmatched performance, low noise levels and safety without sacrificing airflow
• Matched high quality motors and blades for maximum efficiency
• Powder coated steel guards for increased durability and corrosion resistance
• Hot dipped galvanized guards on VK12-GA and VK20-GA models for even greater rust protection
• Powder coated steel mounting bracket and power cord included
• Wide variety of mounting options available for flexible and easy installation
• Variable speed controls available
• Misting kits available for even greater cooling
• Two year warranty
• Made in the USA

WS-450 45" Aluminum Shutter by Schaefer

Schaefer aluminum shutters allow airflow in a single direction and are used as building air inlets to feed Schaefer exhaust fans, or on exhaust fans to prevent air entry when the fan is not operating.

Aluminum shutters are built tough for long life in the most demanding environments, all at an affordable price.

Features and Benefits:

• Constructed of heavy-duty brushed aluminum for corrosion resistance and greater durability
• Interlocking louvers for maximum weather protection and lightweight for high efficiency and easy installation
• Tie bar to eliminate shutter flapping
• Shutter motor kits available for automated opening/closing

WS-510 51" Aluminum Shutter by Schaefer

Schaefer aluminum shutters allow airflow in a single direction and are used as building air inlets to feed Schaefer exhaust fans, or on exhaust fans to prevent air entry when the fan is not operating.

Aluminum shutters are built tough for long life in the most demanding environments, all at an affordable price.

Features and Benefits:

• Constructed of heavy-duty brushed aluminum for corrosion resistance and greater durability
• Interlocking louvers for maximum weather protection and lightweight for high efficiency and easy installation
• Tie bar to eliminate shutter flapping
• Shutter motor kits available for automated opening/closing

S272CDTC-MB1/P1K/10/TL/T pH Sensor, Flat, 3/4" NPT, PPS TC MB 12V by Sensorex

This series of electrodes is designed to provide an economical multi-purpose solution for in-line or submersion pH measurements. Based on our proven S200C bulb and S350CD flat surface pH glass technology, these rugged and durable electrodes are available in Ryton nipples with 1/2" or 3/4" NPT threads; or in our durable epoxy body with or without quick disconnect top caps. Choose from single or double junction designs, flat or recessed measuring surface configurations and cable lengths and connectors as required.

• Economical design for in-line or submersion use
• Choose from single or double junction models
• Threaded 1/2" or 3/4" NPT connections
• Choose from spherical or flat pH measuring surfaces
• Special models for low ionic and other specialty applications available