$150 - $200

Part Number: 221L-367

Part Number: 221L-386

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

TH109 2-Stage Thermostat by Schaefer

Our broad range of sensors and manual/automatic controls allow dairymen, greenhouse operators, plant managers and others to control fans and heaters and optimize thermal comfort in their facilities.

AI104G GroStar GS4 pH/EC/500ppm/700ppm Combo Pen Tester Kit by Apera

GroStar® Premium Pen Testers are designed specifically for the horticultural market. GroStar's intelligent design reduces the guesswork so you can easily manage your crops success.

Features of GS4 Premium pH Pen:

• Measures pH, conductivity (EC and 500ppm/700ppm) and temperature (5-in-1)
• Compatible with all GroStar replacement probes: pH, Soil pH, EC and PH/EC Combo
• Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance
• Easy-to-use design and fast calibration adjustment
• Double junction replaceable probe, so you don't have to discard the entire pen when the probe reaches its end of life
• Large 3-color backlit screen gives you clear information
• Durable structure, IP67 waterproof rating
• Powered by AAA batteries with auto off function
• Automatic temperature compensation

Includes:

• 2-year warranty (instrument)
• 1-year warranty (probe)
• pH 7 & pH4 calibration solution (50ml bottle each)
• 2.77 EC calibration solution (50ml bottle)
• KCL storage solution (10ml bottle)
• Lanyard and user manual

IB12 12" Economy Circulation Fan, White by Schaefer

Schaefer's made-in-America Import Beater™ circulation fans reduce heat stress and improve air quality at an "import beater" price. These wall and ceiling-mounted fans are designed to circulate large volumes of air in barns, greenhouses, factories and warehouses.

Features and Benefits

• Expanded guard spacing for maximum air movement and low noise
• Powder coated steel guards for corrosion resistance and durability
• Low noise levels and quiet operation
• Thermally protected TEAO motor with matching blade for high performance and long life
• UL and CSA certified motor for added safety
• Two year limited warranty
• Built in the USA

0590 7601 760-1 Digital Multimeter with Capacitance & Auto Setup by Testo

Testo's exclusive auto-test setup enables the user to simply turn on the unit, connect the leads, and begin measuring. The testo 760 Digital Multimeter detects the lead connection and prevents switching from V to A or A to V if leads are not in proper socket. This prevents accidentally blowing the meter's fuse because of incorrect connections. The function and range settings are always correct because the measurement parameters are detected and set automatically. Three easy-to-read buttons replace the traditional rotary switch when selecting manual test functions.

Additional benefits:

• APO (Auto Power Off) saves battery life
• Overmold housing makes it rugged
• Large, backlit, dual readout display with analog bar graph is easy-to-read
• Lead holder conveniently molded into housing for easy storing

Testo's history of efficiency, innovation, and quality now extends into the entire electrical lineup. Once again, Testo brings high value, feature-packed products to the HVAC contractor market.

• Auto test-setup based upon lead connection prevents blown fuses in the meter
• Meter prevents switching from V to A or A to V if leads are not in the proper socket
• Meter automatically detects testing in-process and selects correct meter configuration to save time and optimize accuracy
• 3 buttons that illuminate for easy and clear selection of test functions
• Low Pass Filter and Duty Cycle standard
• Measure up to 400 A with optional clamp probe adapter
• Heavy Duty - Drop and water resistant for tough conditions

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

93711 NexImage 5 Solar System Imager (5MP) by Celestron

Celestron offers a wide array of high-quality, affordable, and user-friendly planetary imagers!

Capture high-resolution planetary, lunar and solar images with almost any telescope with the NexImage 5 Solar System Imager. Combined with the included software package, NexImage 5 brings out tremendous detail and produces images rivaling those taken with astronomical cameras costing hundreds more.

Simply point your telescope at the Moon or a planet and record a quick video. The included software analyzes each frame of video, throws away the fuzzy ones, and perfectly aligns the remaining images. The result is a bright, clear image with the maximum amount of color and detail. NexImage 5 is a great way to get started with astroimaging, especially if you live in a light-polluted area. If you can see the planet the sky, you can image it with NexImage 5!

• 5 Mega pixel color sensor with Micron® DigitalClarity® technology to dramatically reduce image noise levels
• Small pixel sizes provide sub arc-second planetary detail with most telescopes
• View and capture live video on your computer
• Software automatically filters out video frames most affected by poor atmospheric conditions, leaving only the sharpest, clearest frames to be stacked and aligned into one high-quality image
• Camera control software allows you to manually change the gain, contrast, exposure time, frame rate and color saturation using your PC
• Selectable "region of interest" sub-framing
• Machined aluminum 1.25" adapter barrel with C-threads for direct threaded connection to almost any telescope
• Can be used with standard 1.25" eyepiece filters
• Integrated IR-cut optical window
• 2x2 and 4x4 binning capability in color
• Progressive scan
• Includes USB 2.0 cable