$20 - $25

A-7301 COD Calibration Standard, 1000 ppm by AquaPhoenix

This product requires refrigeration.

This calibration standard is to verify accuracy and consistency of your COD testing process by providing a known measurement of 1000 ppm COD.

FLT223 Bent-arm Stainless Steel Horizontal Mount Float Switch by Chicago Sensor

• Versatile, economical and compact.
• UL Listed internal reed switch.
• Normally closed; bottom clip can be removed and float inverted for normally open operation.
• M10 stem threading each switch comes with a nut and silicon o-ring.
• Warranted against manufacturer defect for 90 days from delivery date.

FLT235 4.92' Stainless Float Switch 50W, 400mm Leads Adjustable by Chicago Sensor

• Versatile, adjustable stainless steel liquid level sensor.
• UL Listed internal reed switch.
• Normally closed; float can be removed, inverted and replaced for normally open operation.
• M10 stem threading each switch comes with a nut and silicon o-ring.
• Warranted against manufacturer defect for 180 days from delivery date.

8573100 CL17sc Cell Cleaning Kit by AquaPhoenix

The industry standard Hach CL17sc Colorimetric Chlorine Analyzer uses colorimetric DPD chemistry to continuously monitor water for free or total chlorine. The CL17sc will operate unattended for 30 days and is compliant with US EPA regulation 40 CFR 141.74. Monthly routine maintenance for the CL17sc can be performed in a few minutes, including changing reagents and cleaning the colorimetric cell. No special tools are required, and step-by-step, on-screen instructions for all routine maintenance activities give you the confidence that you performed the task correctly without missing any key steps.

The CL17sc is equipped with a comprehensive set of diagnostic features that help you prevent downtime. With a built-in flow meter, three-color status light, measurement cycle indicators, colorimeter window, and on-screen diagnostics menu you ll spend less time identifying and fixing issues when they arise.

90433-86 Thermowell, 304 Stainless Steel, 4" Length, 3/4" Connection 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.

94246 EclipSmart Solar Filter for AstroMaster 70AZ/EQ and AstroMaster LT 70AZ Telescopes by Celestron

Turn your Celestron AstroMaster 70AZ or AstroMaster LT 70AZ telescope into a solar scope! The EclipSmart Eclipse Solar Filter is a must-have accessory perfect for viewing the Sun and eclipses like the upcoming 2023 Annular Solar Eclipse and 2024 Total Solar Eclipse. Affordable, easy to use, and best of all, all Celestron EclipSmart products conform to the ISO 12312-2:2015(E) international safety standard. This solar filter is custom designed for the AstroMaster 70AZ, AstroMaster LT 70AZ, and AstroMaster 70EQ telescopes. Three safety screws securely hold the filter in place for a safe, snug fit.

Solar Safe Technology

EclipSmart solar products feature Solar Safe filter technology—the ultimate protection from harmful solar radiation, including IR and UV light, plus 99.999% of visible light. Celestron Solar Safe filter technology is SAFE for direct observation of the Sun and has been independently tested to conform to and meet the transmission requirements of ISO 12312-2:2015(E), Filters for Direct Observation of the Sun, EN 1836:2005 + A1:2007 (E) for an E15 Filter for the Direct Observation of the Sun and AS/NZS 1338.1:2012, Filters for Eye Protectors.

Important safety note: inspect your filter before every use. Do not use and discard if damaged, torn, punctured, or separated from the frame in any way.

• SOLAR SAFE TELESCOPE FILTER: Filter conforms to the ISO 12312-2:2015(E) international safety standard for filters directly viewing the Sun. The ideal tool for viewing eclipses, sunspots, or the Sun any day!
• WORKS WITH YOUR EXISTING TELESCOPE: Compatible with Celestron AstroMaster 70AZ/EQ and AstroMaster LT 70AZ telescopes.
• SAFE, SNUG FIT: Three safety screws keep your filter securely attached to your telescope's objective. A safety cap protects the outer surface of the filter when not in use.
• SOLAR FILM MADE IN THE USA: Our Solar Safe film is produced in the USA by American Paper Optics, one of the suppliers recommended by NASA for safe solar viewing.
• GREAT VIEWS AND IMAGES: This filter features an orange tint, producing a natural look perfect for visual observing and capturing images through your telescope.

08068-47 Irreversible 4-Point Micro Horizontal Temperature Label, 320-351F; 10/Pk by Digi-Sense

Labels are made up of a series of temperature-sensitive elements sealed between heat-resistant substrates with transparent windows. Each element changes color distinctly as its rated temperature is met or exceeded. The changes to the label are irreversible, providing a temperature history of the surface being monitored. The labels will not delaminate when removed, allowing them to be attached to an inspection report to serve as a permanent record. Ideal for use in the food, automotive, molding and metal working industries. Accuracy is ±1.8°F below 212°F and ±1°F above 212°F. Shelf life: 1 year after date of purchase.

Reliable proof that the product was maintained at the correct temperature

• Used as a quick inspection tool that the product is in usable condition during the shipping and receiving process
• Save time and money due to costly recalls
• Self-adhesive design