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	Martini pH55/Temp Tester IP67 Waterproof pH tester with large dual-level LCD that displays pH and temperature (°C or °F). The large display shows readings in an extended range from 2.0 to 16.0 pH and simultaneously shows temperature from 5.0 to 105.0°C or 23.0 to 221.0°F.... Only $64.62
	Martini pH55/Temp Probe The double injection electrode can be replaced in a very fast and simple way! The modular design allows easy electrode and battery replacement. Instructions Only $38.81
	Replacement Probe for Hanna Grochek Combo Monitor Model HI 991404 The Combo HI 991404 replacement probe. Only $86.44
	Hanna Grochek Replacement Probe for Water Resistant pH Indicator & Temp. Monitor (HI1286) The gel-filled pH electrode has been specially designed to address the needs of growers. Its design guarantees greater clogging resistance in fertilizer solutions with high concentrations of phosphate, nitrate, etc. Instructions Only $56.21
	Hanna Hydroponics pH Tester HI 99104 is an ideal pocket tester designed with a 0.01 pH resolution and two point manual calibration through easy to reach trimmers, it immediately displays pH variations to reflect the smallest change in the sample. It has a long and slim stem, ideal... Only $45.13
	Hanna DiST 5 Waterproof Tester The original DiST (Dissolved Solids Tester) was first introduced in 1986 by HANNA®. Since then, Conductivity and Total Dissolved Solids measurements have never been easier. DiST's ease-of-use, in combination with its affordability, made it the... Only $96.25
	Replacement Probe for Hanna DiST 5 Waterproof Tester The original DiST (Dissolved Solids Tester) was first introduced in 1986 by HANNA®. Since then, Conductivity and Total Dissolved Solids measurements have never been easier. DiST's ease-of-use, in combination with its affordability, made it the... Only $54.15
	Hanna PHEP 4 Tester With Replaceable Electrode When HANNA® introduced its first version of the pHep (pH electronic paper) in 1986, it immediately revolutionized the standard in pH measurement. pHep's ease-of-use in combination with its affordability made it possible for non-technical and technical... Only $83.38
	Replacement pH Probe for Hanna Combo Tester HI98129 EC & PHEP 4 Tester HI73127 The HI 98129 Combo waterproof tester offer high accuracy pH, EC/TDS and temperature measurements in a single tester! No more switching between meters for your routine measurements. The waterproof Combo (it even floats) has a large easy-to-read, dual-level... Only $53.80