$25 - $50

TDSNA13.4 Conductivity Solution, 7501ppm/13,400uS, 1Qt 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)

10-129-20 Mercaptans Colorimetric Gas Detection Tube, 5 - 120 ppmv (10 Tubes / Box) by RAE Systems

RAE Systems colorimetric gas detection tubes enable quick, on-the-spot measurement of a wide range of toxic and combustible gases and vapors. RAE Systems tubes are easy to read, and provide a sharp, clear color change directly corresponding to the concentration of gas present. RAE Systems tubes are compatible with the RAE Systems piston hand pump, a reliable way to draw samples of an exact volume required for the most accurate measurements.

Key Features

• Wide assortment of tubes available to detect over 300 gases and vapors
• Easyto use, even in multiple layers of gloves
• Easy-to-read with sharp,clearcolorchange
• No calibration or other maintenance required

Applications

• Oil and gas
• Chemicals and petrochemicals
• Agriculture and pestcontro
• Food and beverage production
• Environmental protection
• Fire service
• HazMat response
• Nationalsecurity

90308-11 Irreversible Thermostrip Disinfection Indicator, 150-170F/65-77C; 16/Pk by Digi-Sense

Thermostrip labels are self-adhering and waterproof color-changing labels that measure the surface temperature of dishware in dishwashing machines. Label indicator will turn from white to black when surface temperature reaches rated temperature, providing reliable proof that the items being washed have been fully disinfected. Helps hygiene managers demonstrate that safety disinfection standards have been met.

To use, attach label to the thickest clean dry dish, place in dishwasher, and run. Remove and retain label as a permanent record of temperature attained as an excellent evidencebase for HACCP. Accuracy is ±1.8°F (±1°C). Shelf life: one year after date of purchase.

• Waterproof - designed to withstand the rigors of a full wash

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

WD-35850-02 pH Indicator Strips, 0 to 14, 100/pk by Oakton

Convenient flip-top vials include color comparator chart. Read results immediately after exposing test area to the solution. Strips measure 2-3/4"L x 1/4"W (7 x 2 cm). Each vial contains 100 strips.

Vivid and easy-to-distinguish colors at every pH interval

PWRSGUAR Guardian Monitor Power Supply by Bluelab

Use the international power supply pack with any Bluelab Guardian Monitor.

Power Out: 5V DC, 1Amp

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