$15 - $20

C-6001 Iron Comparator (round) by AquaPhoenix

C-6001 Iron Comparator is a component of K-6210 Iron (total & ferrous) CHEMets Visual Test Kit and K-6010 Iron (total & soluble) CHEMets Visual Kit is designed to be compared against the color formed in R-6201 Iron CHEMets Refill and R-6001 Iron CHEMets Refill. The comparator's range is applicable to many applications including surface and industrial process waters. Color standards are orange in color and cover a range of 0-1 ppm iron (Fe).

TDS3000/P Conductivity Solution, 3000ppm/3900uS, 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)

90260-47 Pocket Liquid-In-Glass Thermometer; 20 to 120F, Closed Metal Case, Organic Liquid Fill by Digi-Sense

These thermometers are ideal for use in laboratory, biology, chemistry, university, photographic, food/beverage, petrochemical, automotive, wastewater and many other general purpose applications. The protective plastic case protects these thermometers from accidental breakage during use and storage. The section of the case that surrounds the bulb has small openings for circulation. All DURAC Plus® thermometers feature markings that are permanently printed on the glass, blue spirit liquid that has a dark scale contrasts against a white background.

• Non-mercury blue spirit liquid
• Closed metal case

Includes

Rugged metal case with an eyelet at the top for easy suspension

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.

44428 EclipSmart Universal Solar Filter by Celestron

Turn your telescope, spotting scope, or DSLR camera into a solar scope! The EclipSmart Universal 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, Solar Safe, this filter conforms to the ISO 12312-2:2015(E) international safety standard. The EclipSmart Universal Solar Filter has a solar filter aperture of 60mm and works with any optic or lens measuring 75 to 100 mm in diameter, including telescopes, spotting scopes, and DSLR camera lenses. The solar filter fits around your optical device with adjustable side panels that secure with a rubber band for a snug fit. We include (2) rubber bands, but we recommend that you change out the bands frequently. To replace use #32 rubber bands. When it's not in use, fold the filter flat and place it inside the reusable bag.

If you plan to use this filter with your DSLR camera, we recommend adding a sunshade to the camera lens. This will expand the lens diameter and allow for a more secure attachment to the filter using the rubber bands. We also recommend using a tripod, monopod, or other stabilizing device with your camera setup. You can use your camera and filter intermittently over extended periods of up to several hours, but do not point your camera and filter directly at the Sun for more than three continuous minutes.

Never use this filter if your camera has an optical viewfinder. If you are uncertain about the type of viewfinder on your camera, do not use this filter. Always ensure that the filter is placed directly onto the camera lens during imaging, never between the viewfinder and your eye.

If you would like to use tape to secure the filter to your optic, Celestron recommends low-tack painter's tape to prevent any potential damage to your optic.

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, SPOTTING SCOPE, OR DSLR CAMERA: Compatible with objective lenses with an outside diameter of 75mm to 100mm.
• SAFE, SNUG FIT: To use, adjust the side panels to fit the filter on your optical device and attach the rubber band for a secure fit.
• COMPACT AND PORTABLE: Filter folds flat for storage in its reusable bag 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 scope or camera.

TDS1000/P Conductivity Solution, 1000ppm/1417uS, 1 Pt. 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)

MA9069 5000 μS/cm Conductivity Calibration solution - 230 ml Bottle by Milwaukee

The performance of conductivity probes are affected by use due to residue build up and aging.

MA9069 is a lab grade 5000 μS/cm conductivity solution standard prepared against a NIST traceable potassium chloride solution that allows you to recalibrate your conductivity meter or tester. Check your meter or tester's manual to find the correct calibration standard for your meter.

Conductivity readings are effected by temperature. To help with this, a chart of the actual μS/cm value at various temperatures is printed on each bottle

Milwaukee conductivity solutions are labeled with the lot number and expiration date and packaged in an air tight, tamper-proof sealed bottle.

DESIGN FEATURES

• Fundamental for accurate conductivity measurement.
• Factory calibrated with potassium chloride NIST 2202 SRM (Standard Reference Material) in deionized water for analytical use in accordance with ISO 3696/BS3978.
• Sealed against light with air tight, tamper proof cap.
• Each 230 mL bottle is marked with lot number and expiration date.
• A temperature chart of the actual µS/cm value at various temperatures is printed on each bottle.
• 5 year expiry date.

90260-46 Pocket Liquid-In-Glass Thermometer; 0 to 220F, Closed Metal Case, Organic Liquid Fill by Digi-Sense

These thermometers are ideal for use in laboratory, biology, chemistry, university, photographic, food/beverage, petrochemical, automotive, wastewater and many other general purpose applications. The protective plastic case protects these thermometers from accidental breakage during use and storage. The section of the case that surrounds the bulb has small openings for circulation. All DURAC Plus® thermometers feature markings that are permanently printed on the glass, blue spirit liquid that has a dark scale contrasts against a white background.

• Non-mercury blue spirit liquid
• Closed metal case

Includes

Rugged metal case with an eyelet at the top for easy suspension

MA9066 100% NaCl Conductivity Calibration Solution - 230 ml Bottle by Milwaukee

The performance of conductivity probes are affected by use due to residue build up and aging.

MA9066 is a lab grade 100% NaCl (EC) solution standard prepared against a NIST traceable potassium chloride solution that allows you to recalibrate your conductivity meter or tester. Check your meter or tester's manual to find the correct calibration standard for your meter.

NaCl (EC) readings are effected by temperature. To help with this, a chart of the actual μS/cm value at various temperatures is printed on each bottle

Milwaukee NaCl (EC) solutions are labeled with the lot number and expiration date and packaged in an air tight, tamper-proof sealed bottle.

DESIGN FEATURES

• Fundamental for accurate conductivity measurement.
• Factory calibrated with potassium chloride NIST 2202 SRM (Standard Reference Material) in deionized water for analytical use in accordance with ISO 3696/BS3978.
• Sealed against light with air tight, tamper proof cap.
• Each 230 mL bottle is marked with lot number and expiration date.
• A temperature chart of the actual μS/cm value at various temperatures is printed on each bottle.
• 5 year expiry date.

MA9064 80,000 μS/cm Conductivity Calibration Solution - 230 ml Bottle by Milwaukee

The performance of conductivity probes are affected by use due to residue build up and aging.

MA9064 is a lab grade 80,000 μS/cm conductivity solution standard prepared against a NIST traceable potassium chloride solution that allows you to recalibrate your conductivity meter or tester. Check your meter or tester's manual to find the correct calibration standard for your meter.

Conductivity readings are effected by temperature. To help with this, a chart of the actual μS/cm value at various temperatures is printed on each bottle

Milwaukee conductivity solutions are labeled with the lot number and expiration date and packaged in an air tight, tamper-proof sealed bottle.

DESIGN FEATURES

• Fundamental for accurate conductivity measurement.
• Factory calibrated with potassium chloride NIST 2202 SRM (Standard Reference Material) in deionized water for analytical use in accordance with ISO 3696/BS3978.
• Sealed against light with air tight, tamper proof cap.
• Each 230 mL bottle is marked with lot number and expiration date.
• A temperature chart of the actual µS/cm value at various temperatures is printed on each bottle.
• 5 year expiry date.