$15 - $20

TDS30/P Conductivity Solution, 30ppm/46.7uS, 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)

CAREKITPHL Probe Care Kit - pH by Bluelab

Probe cleaning is one of the most important parts of owning or operating any Bluelab® meter, monitor or controller.

The probe surface is where the instrument takes the reading of the solution or soil/media. If the probe face is dirty or contaminated, then the reading will be inaccurate.

Accurate readings simplify crop management and provide improved growth.

Use Bluelab® Solutions to re-stock your probe care kit.

Features

• 20ml / 0.67fl oz single-use Bluelab Solution Sachets, 2 each of: pH 7.0 & pH 4.0 and KCl
• 3 plastic cups
• Bluelab® pH Probe Cleaner
• Bluelab® Toothbrush (pH probe cleaning instrument)

BU5918-P Buffer, pH 9.18, 500mL by AquaPhoenix

• ± 0.02 at 25°C

pH Buffer should be used regularly, typically every day the meter is used to calibrate your pH meters. Pour buffer into a clean separate container and never return used or unused buffer back into the container. Always keep tightly capped and adhere to the expiration date which is printed on the label.

Traceable to NIST

Specifications

• Packaging Type: Poly
• Size: 500 mL
• pH Value: 9.18

C-7807 Sodium Persulfate Comparator (round) by AquaPhoenix

C-7807 Low Range Persulfate Comparator is a component of K-7870 Persulfate CHEMets Visual Test Kit and is designed to be compared against the color formed in R-5510 Hydrogen Peroxide/Persulfate CHEMets Refill. The comparator's range is applicable to many industrial applications. Color standards are orange in color and cover a range of 0-5.6 ppm sodium persulfate.

SX-FAN Sensor Fan by Agrowtek

GrowControl™ sensors feature a sampling fan which draws approximately 6cfm continuously through the sensor redicing ambient error for continuous sensor accuracy.

• 24Vdc
• 6cfm

94415-46 Pocket Timer; 5 Minute Markings and Transparent Housing by Digi-Sense

Pocket timers are adjustable from 0 to 60 minutes in 1-minute increments. Turning the pointer to the desired countdown setting automatically winds the timers. Indicating pointer always shows exact time remaining.

Model 94415-46 has a 5-minute marking faceplate with transparent housing.

• Get accurate, reliable measurements with included NIST-traceable calibration

Includes

lanyard, and key-chain.