Oxidation Reduction Potential (ORP) Tester

An ORP reading / Redox value can be used to:

  • Indicate suitability of soil, etc. for biological life
  • Determine when additional cultivation is unnecessary
  • Indicate stability and stage of completion of compost

A simple formula using the readings from an ORP and a pH meter, provides a Redox (rH) value from 0 to 42. Optimum soil rH value is 25 - 28. The pocket tester with a single range (+/- 999 mv) also may be used to measure H2O2 / H2O mixtures.

ORP Meters

Results 1 - 9 of 9

ExTech Waterproof Palm pH, ORP Cabled Meter (PH220-C)

This handy palm sized meter measures the pH and temperature of your test sample with a 39 inch cabled electrode. Comes with protective holster, pH buffers and a 9V battery. Range pH 0.00 to 14.00pH,...
 
Sales price: $169.99
SKU: PH220-C
 
 
 
 
 

ExTech Waterproof Palm pH, ORP Stick Meter (PH220-S)

This handy palm sized meter measures the pH, ORP and temperature of your test sample with a stick style electrode. Comes with protective holster, pH buffers and a 9V battery. Range pH 0.00 to...
 
Sales price: $169.99
SKU: PH220-S
 
 
 
 
 

Extech Oyster Series pH ORP Kit (Oyster-15)

This oyster meter will measure pH and ORP and comes in a handy carrying case. This meter is great for both laboratory use and field use thanks to its flip up design and rugged splash proof covering.
 
Sales price: $219.99
SKU: OYSTER-15
 
 
 
 
 

Extech Oyster Series pH, ORP and Temperature Kit (Oyster-16)

The same as Oyster-15 kit but added temperature probe. Measures pH, ORP and temp. Comes in a handy carrying case. This meter is great for both laboratory use and field use thanks to its flip up...
 
Sales price: $269.99
SKU: OYSTER-16
 
 
 
 
 

Extech Heavy Duty pH, ORP and Temperature Kit

This kit comes with the heavy duty pH ORP Temperature meter and a mini pH electrode, Temperature Probe, and a handy carrying case. Measures ORP to 1999mV and pH 0.00 to 14.00 pH
 
Sales price: $299.99
SKU: 407228
 
 
 
 
 

Extech pH ORP Temperature Data Logger – SDL100

This temperature, pH and ORP data logging meter is designed to test all three of these measurements and save up to 20,000 readings to an SD card. This meter saves the information in Excel format.
 
Sales price: $359.99
SKU: SDL100
 
 
 
 
 

Extech Benchtop Water Quality Meter/Stirrer for pH, ORP and Temp (WQ500)

This highly accurate benchtop meter features a built-in magnetic stirrer and a probe support rod and clamp. It measures pH, ORP, and temperature accurately over a wide range.
 
Sales price: $478.99
SKU: WQ500
 
 
 
 
 

Extech Benchtop Water Quality Meter/Stirrer 6 Parameter (WQ510)

This highly accurate benchtop meter features a built-in magnetic stirrer and a probe support rod and clamp. It measures 6 water quality parameters including pH, ORP, salinity, conductivity and more.
 
Sales price: $628.99
SKU: WQ510
 
 
 
 
 

Extech Benchtop Water Quality Meter/Stirrer 7 Parameter (WQ530)

This highly accurate benchtop meter features a built-in magnetic stirrer and a probe support rod and clamp. It measures 6 water quality parameters including pH, ORP, salinity, dissolved oxygen and...
 
Sales price: $828.99
SKU: WQ530