$25 - $50

WD-35850-14 Buffer Capsules, pH 7; 10/Pk by Oakton

Buffer salts inside capsules require 100 mL of deionized or distilled water to produce a clear pH calibration solution accurate to ±0.02 pH (at 25°C) with traceability to NIST standards. Capsules are easier to store and transport than prepared aqueous buffer solutions. Capsules are color-coded for easy identification if mixed.

Store buffer solution in an airtight container at room temperature for three weeks. Unused capsules have a five-year shelf life. Each vial contains 10 capsules.

Fresh pH calibration solution anytime and anywhere

• Each capsule mixes with 100-mL of deionized water to create a clear, 7.00 pH solution

Includes

Ten green-colored capsules.

481234 Test Strips: Ozone 0, 0.05, 0.1, 0.2, 0.3, 0.4, >0.5 ppm by AquaPhoenix

pk. 50. Quick and easy to use. Suitable for indoor and outdoor use. Analyze 10 minutes after exposure.

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

CD601 Conductivity Tester with ATC and 1 point manual calibration by Milwaukee

The Milwaukee CD601 digital electrical conductivity (EC) Pen is designed for aquariums, aquaculture, pools, water conditioning and many other applications. The CD601 helps you make sure that your water has the right amount of nutrient to help keep fish tanks healthy or helps you keep your filters up-to-date and clean for water filtration. Keep EC in your target range to help your achieve better results.

DESIGN FEATURES

• Measures microSiemens (μS/cm) direct and with automatic temperature compensation.
• Ideal range for aquariums (0 to 1990 μS/cm).
• Units in μS/cm are easily convertable to (ppm).
• Factory calibrated with the ability to recalibrate if needed.
• Automatic Temperature Compensation (ATC).
• 350 hours continuous use (4 x 1.5V batteries included).
• Simple one point calibration.

MAINTENANCE

EC electrodes can develop nutrient build up over time. To miminize build up, always rinse the probe in fresh tap or DI water after every use.

CONVERTING EC TO TDS

The Milwaukee EC Pen, like all conductivity meters, provides a measure of electrically charged ions in a solution and is an absolute measure of conductivity.

EC is often converted to TDS in parts per million (ppm). Different scales include the 500 scale, 650 scale and the 700 scale. However, true PPM can only be determined through chemical analysis.

Your mS/cm reading can be approximately converted to TDS (ppm) as shown in the examples below.

2,000 μS/cm = 2.0 mS/cm = 1000 ppm on .50 factor scale

2,000 μS/cm = 2.0 mS/cm = 1400 ppm on the 442 scale or .70 factor scale

PBX-102 2-Port Chemical Injection Manifold by Agrowtek

PBX-104 is a simple multi-port manifold for connecting Agrow-Dose peristaltic dosing pumps into a recirculating sample loop for injecting chemicals such as nutrients or pH buffers.

The PBX-100 series injection manifolds are often combined with a PBX-210, PBX-310, or PBX-410 sensor probe manifold for sampling of the solution prior to the injection point.

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

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

90250-60 Liquid-In-Glass Refrigerator/Freezer Thermometer; -40 to 27C (-40 to 80F), Steel Case by Digi-Sense

This low-temperature thermometer is ideal for refrigerators and freezers. Thermometer features a dual-scale range of -40 to 80°F (-40 to 27°C) with divisions of 2°F (1°C). The large numbers and magnified lens make reading easy. Red spirit-filled thermometer is made of plastic and includes stainless steel clips to easily mount and hang from shelves.

• For reference only (should not be calibrated)

90433-42 Thermowell Brass, 9" Length, 1/2" 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.

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

10-116-25 Phosphine Colorimetric Gas Detection Tube, 50 - 1,000 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

TDS15 Conductivity Solution, 15ppm/23.8uS, 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)