$25 - $50

Handle: 150 X Ø18
Probe: 219 X Ø4.8
Probe Head: Ø13.7
Temperature: -100°C ~ +400°C OR -148°F ~ +752°F

*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

WD-05942-49 High-Accuracy Buffer Solution, pH 7.000; 500 mL by Oakton

pH Calibration buffers for tight tolerances

• For meters with 0.001 resolution
• Precision reference standard: pH 7.000 ±0.002 at 25°C

*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

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

1454899 Citric Acid Powder Pillows for Silica, 25 mL, pk/100 by AquaPhoenix

For silica determination by photometric methods. Sample Size: 25 mL Pack of 100 powder pillows

TDS300 Conductivity Solution, 300ppm/445uS, 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)

106002-01P Dye, Blue, NF, 1 pint by AquaPhoenix

We offer a full-line of fluorescent dyes to help detect leaks in your closed loop system. The dyes are available in several strengths and sizes and can be used in liquid, powder, or tablet form.

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

K-1413 Ammonia Vacu-vials® (0-3.00 ppm & 0-60.0 ppm) by AquaPhoenix

This kit can be used to determine free ammonia concentration in the presence of monochloramine. See "Free NH3N Procedure (K1413)" under Procedures & Instructions

*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

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

CD611 Conductivity Tester with ATC and 1 point manual calibration by Milwaukee

The Milwaukee Conductivity Pen is designed for hydroponic and other growers to help you make sure that your plants are receiving the right amount of nutrient. Keep EC in your target range to help your achieve better results.

DESIGN FEATURES

• Measures conductivity and temperature with automatic temperature compensation
• Ideal range for hydroponics (0 to 20,000 μS/cm)
• Units in μS/cm easily convertable to ppm
• Factory calibrated with the ability to recalibrate if needed
• 350 hours continuous use (3 x 1.5V batteries included)

MAINTENANCE

EC electrodes can develop nutrient build up over time. To miminize build up, always rinse the probe in fresh tap 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

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