For Testing For Testing |
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Maximum Oxidation Reduction Potential (ORP) Maximum OxidationReduction Potential (ORP) |
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Minimum Oxidation Reduction Potential (ORP) Minimum OxidationReduction Potential (ORP) |
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pH Range pH Range |
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For Use With For Use With |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Switch Configuration Switch Configuration |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Oxidation Reduction Potential (ORP) Accuracy Oxidation ReductionPotential (ORP) Accuracy |
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Meter Type Meter Type |
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Chemistry Sensors


A bayonet connection makes these sensors compatible with most chemistry meters and controllers. They cannot be sold to the regions listed due to import regulations.
Threaded sensors have an NPT male connection for installation in pipes and tanks.
Mount Type (Connection) | Oxidation Reduction Potential (ORP) Range | Temp. Range, °F | Sensor Material | For Use With | Cannot Be Sold To | Choose a Cable Lg., ft. | Each | |
Hand Held | -1,999 to 1,999 mV | 32° to 140° | Glass | Clean Liquids, Dirty Liquids | Canada | 00000000 | 0000000 | |
Threaded (NPT Male 3/4) | -1,999 to 1,999 mV | 32° to 140° | Glass | Clean Liquids, Dirty Liquids | Canada | 00000000 | 000000 |
Multifunction Chemistry Controllers


The same controller can actuate equipment based on pH or oxidation reduction potential (ORP). Attach pH and ORP sensors (not included) and set the current measurement type with the selection switch. Controllers turn equipment on or off when the reading reaches the actuation point. They have one control relay and two alarm relays. Relays are single pole, double throw (SPDT) and can be set to turn one circuit from “off” to “on” (normally open) or from “on” to “off” (normally closed). Automatic temperature compensation standardizes readings at 77° F to prevent inaccurate results in fluctuating temperatures.
Controller with LED display is more visible in low-light conditions than controller with LCD display.
pH | Oxidation Reduction Potential (ORP) | |||||||||||
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DIN Trade Size | Range | Accuracy | Range | Accuracy | AC Voltage (Phase) | Mount Type | Ht. | Wd. | Dp. | Fasteners Included | Each | |
LCD Display | ||||||||||||
1/4 | 0.0 to 14.0 pH | ±0.01 pH | -1,999 to 1,999mV | ±0.1% | 120 (Single) | Panel | 3 3/4" | 3 3/4" | 4 3/4" | No | 00000000 | 0000000 |
LED Display | ||||||||||||
1/4 | 0.0 to 14.0 pH | ±0.01 pH | -1,999 to 1,999mV | ±0.1% | 120 (Single) | Panel | 3 3/4" | 3 3/4" | 4 3/4" | No | 00000000 | 000000 |
ORP Meters

Measure a solution’s oxidation reduction potential (ORP) to determine its ability to break down contaminants. These meters are commonly used to monitor water quality in pools, spas, and other clean liquids. Use a Calibration Solution (not included) and the calibration adjustment screw to maintain accuracy. Meters cannot be sold to Canada due to import regulations.
Oxidation Reduction Potential (ORP) | ||||||
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Sensor Material | Range | Accuracy | Batteries Included | Cannot Be Sold To | Each | |
For Use With Dirty Liquids | ||||||
Nonglass | -999 to 999 mV | ±2 mV | Yes | Canada | 0000000 | 0000000 |
Water-Resistant ORP Meters

Since this oxidation reduction potential (ORP) meter has a housing that meets IP67 for complete resistance to dust and protection from temporary submersion, it’s often used to determine a solution’s ability to break down contaminants in harsh field conditions. For use with dirty liquids containing heavy metals, sulfides, and harsh chemicals, this meter is often used for wastewater treatment. Automatic temperature compensation standardizes readings at 77° F to prevent inaccurate results in fluctuating temperatures. Use a Calibration Solution (not included) and the calibration button to maintain accuracy. Meters cannot be sold to Canada due to import regulations.
Meters | |||||||||||
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Oxidation Reduction Potential (ORP) | Replacement Sensors | ||||||||||
Sensor Material | Range | Accuracy | Automatic Temperature Compensation (ATC) Range, °F | Environmental Rating | Specifications Met | Batteries Included | Cannot Be Sold To | Each | Each | ||
For Use With Dirty Liquids | |||||||||||
Glass | -1,000 to 1,000 mV | ±2 mV | 32° to 140° | IP67 | CE Marked | Yes | Canada | 00000000 | 0000000 | 00000000 | 0000000 |
Remote-Reading pH Meters with PC Output


Transmit pH readings to a PC for analysis. These meters have a sensor on a 6-ft. cable for taking remote readings of water and other clean liquids. They have automatic temperature compensation that standardizes readings at 77° F to prevent inaccurate readings in fluctuating temperatures. Use the included calibration solution and calibration button to maintain accuracy.
Water-Resistant Multifunction Chemistry Meters

Clean
Liquids
Test different water-chemistry measurements in dirty, wet conditions. Often used in pools and spas, all of these meters are for use with clean liquids. Automatic temperature compensation standardizes readings at 77° F to prevent inaccurate results in fluctuating temperatures. Use a calibration solution (not included) and the calibration button to maintain accuracy.
IP57 meters are protected from dust and temporary submersion in liquids.
Chlorine, oxidation reduction potential (ORP), and pH meters come with three sensors that each take one chemistry measurement. They cannot be sold to Canada due to import regulations.
Sensor Material | Automatic Temperature Compensation (ATC) Range, °F | Environmental Rating | Specifications Met | Batteries Included | Cannot Be Sold To | Each | |
For Use With Clean Liquids | |||||||
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Glass | 23° to 194° | IP57 | CE Marked | Yes | Canada | 0000000 | 0000000 |
Easy-Read Bench-Top Multifunction Chemistry Meters

Don’t strain your eyes reading a scale—these bench-top meters indicate exact results on the digital display. For complete resistance to dust and protection from temporary submersion, these meters float and have a housing that meets NEMA 6 and IP67. They're for use with water and other clean liquids. Automatic temperature compensation standardizes readings at 77° F to prevent inaccurate results in fluctuating temperatures. Use a Calibration Solution (not included) and the calibration button to maintain accuracy.
Meters | Replacement Sensors | ||||||||
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For Testing | Sensor Material | Automatic Temperature Compensation (ATC) Range, °F | Environmental Rating | Specifications Met | Batteries Included | Each | Each | ||
For Use With Clean Liquids | |||||||||
Conductivity, Oxidation Reduction Potential (ORP), pH, Resistivity, Total Dissolved Solids (TDS) | Glass | 32° to 160° | IP67, NEMA 6 | CE Marked | Yes | 000000 | 000000000 | 000000 | 0000000 |