$10.76 - $26.90

This concentrated acid formula is used to lower or higher the pH in a reservoir

$17.20

Contains: 8 oz. pH UP, 8 oz. pH DOWN, 1 oz. indicator & vial

$7.54

1 oz. test kit with test vial offers wide spectrum testing (pH 4.0 to 8.5). This concentrated solution requires only 5 drops per test.

$17.95

$46.95

pH electrodes are commonly designed to produce and output signal equal to 0 mV when immersed in a solution with pH 7. But a constant output value at...

$123.95

The original DiST (Dissolved Solids Tester) was first introduced in 1986 by HANNA®. Since then, Conductivity and Total Dissolved Solids measurements...

$61.95 - $111.95

HI 981401N has been designed to meet the Grower's need for equipment suited to the aggressive environments found in agricultural and hydroponics...

$19.49

$194.95

The Combo HI 991404 meter is designed for continuous, high accuracy pH, EC/TDS and temperature measurements. These microprocessor indicators...

$19.95