$15 - $20

18527-88 Miniature Connector/Cable Clamp by Digi-Sense

Wire clamps secure and stabilize thermocouple and RTD wire/connector junctions. Use clamps where physical stresses lead to failed junctions. Available in both standard and miniconnector sizes.

3002 Test Strips: Chlorine Dioxide, 0-500 ppm by AquaPhoenix

LaMotte High Range Chlorine Dioxide Test Strips, 0-500 ppm, 50/pk

Range: 0, 10, 25, 50, 100, 250 & 500

A-1410 Ammonia Solution Pack by AquaPhoenix

A-1410 is designed to be a refill of the accessory solutions found in the K-1420 Ammonia CHEMets® Test Kit (HBA). It contains: Two 10 mL bottles of A-1404 Stabilizer Solution, two 10 mL bottles of A-1405 Catalyzer Solution, and two 10 mL bottles of A-1406 Activator Solution. This is enough of each solution to perform approximately 80 tests.

TDSK180/P Conductivity Solution, 85.2ppm/180uS, 1Pt. 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)

93581 Night Vision Red Headlamp by Celestron

The disruptive glare of white light can ruin your stargazing experience in an instant. Steer clear of white light while still navigating your observing site safely with this astronomer's essential, the Night Vision Red Headlamp. Designed specifically to preserve your night vision, and powered by a long-lasting LED, this headlamp provides the perfect amount red-light illumination, ensuring comfortable stargazing sessions where you can see more detail in celestial objects by preserving your dark-adapted vision.

Using the Night Vision Red Headlamp is simple and intuitive. First, install (2) AAA batteries, and then adjust the headlamp strap for a comfortable and secure fit, so it sits snugly on your head. Next, adjust the lamp's pointing position up to 45° to direct the light exactly where you need it. Depending on the task at hand, the headlamp is equipped with two red brightness levels, a blinking light, and an SOS setting. You can walk around your observing site, read star charts, or even grab that eyepiece you left in your gear bag, all while preserving your night vision.

Rigorously tested to ensure reliability and longevity, the Celestron Night Vision Red Headlamp provides up to 100 hours of continuous illumination, when set to the low brightness setting. That means you can rely on your headlamp to accompany you through countless stargazing sessions, camping trips, and outdoor adventures without worrying about running out of power. And if you do run out of juice, simply pop in fresh batteries and keep going–no need to find a power source and wait to recharge via USB.

• Optimal Night Vision: A traditional white flashlight can ruin your night vision in an instant. Preserve your eyes' dark adaptation while navigating your environment safely with this red-only LED headlamp. It minimizes disruption and allows for extended stargazing sessions without eye strain.
• Hands-Free Convenience: Enjoy the freedom of hands-free illumination with this adjustable headlamp. It's perfect for setting up telescopes, handling star charts, and more.
• Multiple Light Modes: Seamlessly switch between two brightness levels, a blinking light, and an SOS setting.
• Comfortable Fit: The adjustable, ergonomic head strap provides a secure and comfortable fit, ideal for long nights under the stars. And with a 45° adjustable angle, you can direct the light where you want it.
• Long Battery Life: Powered by an efficient LED, this headlamp offers up to 100 hours of continuous use, ensuring reliable performance for all your adventures.
• Versatile and Portable: Perfect for astronomers, campers, and outdoor enthusiasts, this headlamp is a versatile, grab-and-go tool for a variety of nighttime activities.

90433-40 Thermowell, Brass, Standard, 1/2" NPT (M), 4" Stem by Digi-Sense

To match your probe to a thermowell, first measure the distance from the probe's tip to the top of the thread (typical thread length is 0.5" for 1/2" NPT fittings). Next, match this length to the probe depth of the thermowell ("A" dimension). Other thermowell sizes and materials are available - call our Application Specialists for more information.

• Limited-Space Thermowell when you need a shorter insertion depth.
• Standard Thermowell for general-purpose applications.
• Heavy-Duty Thermowell for higher fluid velocity ratings.

18526-21 Type J Economic Bolt On Thermocouple Probe #6 Screw 12" Fiberglass Ext. 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).

• Available in #6 (M3.5) or #8 (M4) screw sizes and different lead lenghts
• Response Time: 2-4 seconds or greater
• Each probe comes with a color coded ANSI mini connector or stripped leads: type J-black, type K-yellow, type T-blue, and type E-purple.
• Custom designs or changes to this product are available upon request

0554 2016 Grommet for Extension S1 Sensor by Testo

The display cabinet bushing for the temperature and humidity probe (0572 2156) is required to mounting the probe inside the display case. To install the display cabinet bushing in the base plate you will need a 20-mm diameter hole. The temperature and humidity probe inserts into the bushing and connects it to the Wi-Fi probe with an extension cable. The internal micro-climate of the display case will not be affected since both, the bushing and the temp/rH probe, are designed to prevent the air leak.

• An O-ring seal on the probe fits inside the bushing to prevent the air leak.

Includes:

Display cabinet bushing for humidity and temperature probe 0572 2156.