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Checker pH Tester with Replaceable Electrode

The HI98103 Checker pH tester has been designed with many advanced features while maintaining the lo..


Checker Plus pH Tester

HI98100 Checker® Plus pH Tester The HI98100 Checker Plus is the next generation of the original Han..

$58.99 $58.99

CO2 Tester Kit

We recommend measuring CO2 periodically to ensure optimum levels for growth. The Active Air CO2 Test..


Combo pH/ ORP/ Temperature Tester

HI98121 is a waterproof meter that measures pH, ORP and temperature. The housing of this tester has ..

$255.99 $255.99

Combo pH/EC/TDS/C/PPM Tester

This waterproof tester offers high accuracy pH, EC/TDS, and temperature measurements all in a single..

$213.99 $213.99

DiST 1 TDS Tester

The waterproof DiST 1 features a large multi-level LCD which displays both TDS and temperature readi..


EC/TDS/Temp Waterproof Hydro Tester

The COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing application..


EC65 Waterproof Tester

The C65 is a microprocessor-based conductivity tester with a rugged one-piece IP67 waterproof casing..


EC66 Waterproof Tester

The C66 is a microprocessor based Waterproof Conductivity Tester with a rugged one-piece IP67 waterp..


GroChek Hanna pH/EC/TDS/C/PPT Pocket Tester

Here is a waterproof tester that offers high accuracy pH, EC/TDS, and temperature measurements in a ..


Milwaukee TDS/PPM T75 Tester WP

Stainless steel probes deliver fast and accurate readings with ten times better resolution. Comes w..


Milwaukee Waterproof PH Tester

• Range -2.0 to 16.0 pH • Resolution 0.1 pH • Accuracy ± 0.1 pH • ATC automatic • Calibration 2 poin..