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pH and ORP for Online Water Measurement Systems
When it comes to determining water quality as part of your application or process, pH and Oxidation Reduction Potential (ORP) are among the most critical and insightful measurements.
From simple end-point values through continuous readings in the harshest, most strictly regulated environments, choose Thermo Scientific, and our Orion and AquaSensors brands in your pH and ORP measurements.
Online pH and ORP categories
Extensive array of sensing technologies, signal types, and more, along with the performance to support your operations.
Thermo Scientific AquaSensors and Orion sensors provide real-time, accurate pH/ORP measurements and more across your facility. With options ranging from high performance to budget friendly, increase efficiency and confidence while saving time, resources, and money. For control, look to our plug-and-play, fully configurable DataStick online sensors.
| AquaSensors DataStick pH Measurement System | AquaSensors DataStick ORP Measurement System | AquaSensors AnalogPlus Differential pH and ORP Sensors | Orion pHR Process ROSS Electrode | Orion 2001SC ROSS combination pH Electrode | |
|---|---|---|---|---|---|---|
 | |  |  |  | ||
| Key Features | pH Measurement with digital communication capability | ORP Measurement with digital communication capability | Conventional pH electrode for challenging applications | Fast response, drift free reference system with stable measurement | Fast response, drift free reference system with stable measurement | |
| Measurement Specifications | Accuracy | 0.1% of the reading | 0.1% of the reading | 0.1% of the reading | 0.1 pH | 0.02 pH |
| Range | 0-14 pH | -2100 mV to +2100mV | 0-14 pH, ORP-2100 mV to +2100 mV | 0-14 pH | 0-14pH | |
| Resolution | xx.xx | xxxx.x | xx.xx/xxxx.x | xx.xx | xx.xx | |
| Sensors | • PEEK /CPVC Sensor body • Titanium ground rod • Viton -O- ring • Standard glass / HF resistant glass electrode/gold/platinum electrode for ORP • 1"NPT • PT1000 RTD temperature sensor • Replaceable salt bridge • Modbus RTU/ethernet/USB built in communications | • PEEK / CPVC sensor body • Titanium ground rod, • Viton -O- ring • Standard glass / HF resistant glass electrode for pH gold/platinum electrode for ORP • 1"NPT, 1-1/2"NPT • PT1000 RTD • NTC300 • Replaceable salt bridge | • PEEK sensor body • Titanium ground rod • Viton -O- ring • Standard glass / HF resistant glass electrode • 1"NPT • PT1000 • RTD Combinational / differential electrode type • Replaceable salt bridge | • Glass electrode • Ceramic liquid junction • Installed in stainless steel (316) flow cell with mounting bracket • Sidearm for attachment to a reservoir ceramic liquid junction | ||
| Application | • Wastewater treatment • Metal finishing • High purity water • Odor scrubbers • Pharmaceutical • Chemical & petrochemical • Reverse osmosis • Cooling tower control • Food processing | • Wastewater treatment • Metal finishing • Bleaching pulp • Disinfection control | • Waste water treatment • Pharmaceutical • Chemical and petrochemical • High purity water • Food processing • Metal finishing | • Wastewater treatment • Industrial water treatment • Drinking water treatment | • Ultra pure water • Boiler Water • Condensate • Bottling Water Municipal Water • Water for Injection • Water for Fabrication | |
| Associated controller/transmitter | • Can be connected directly to DCS/PLC • Aquapro • AV38 | • Aquapro • AV88 • Alpha 2000 series* | • Orion 2100 Series • Aqua pro • AV88 • Alpha 2000 series* | |||
| Mounting accessories- Options | • 1", 1-1/2" Tee • Union & ball valve SS 316 & CPVC fittings • Immersion mounting with hand rail swivel mounting and PVC junction box | • 1", 1-1/2", 2" Tee • Union & ball valve SS 316 & CPVC fittings • Immersion mounting with hand rail swivel mounting and PVC junction box | • SS 316 & CPVC fittings • 1" Tee, • 1-1/2" Union, • 1-1/2" ball valve • PVC junction box | • SS316 Flow cell (Mandatory part of the measuring system) | ||
| Catalog # | Quote | Quote | Order | Order | Order | |
| AV38 | AV88 | AquaPro | Orion 2100 Series | Alpha 2000 Series* |
|---|---|---|---|---|---|
| Input sensor type | Digital (Data stick version) | Analog via the personality module | Digital (Data stick version) / Analog | Analog version only | Analog version only |
| Channels | Two sensors for MODBUS | One sensor | Upto 4 Sensors | Upto 2 Sensors | One sensor |
| Supported sensors | • pH • ORP • Conductivity • Dissolved oxygen • Dissolved ozone • Turbidity • Suspended solids • With automatic temperature compensation (ATC) wherever applicable | • pH • ORP • Conductivity (includes resistivity, concentration, salinity and TDS) • Dissolved oxygen • Dissolved ozone • Turbidity • Suspended solids • With automatic temperature compensation (ATC) wherever applicable | • pH • ORP • Conductivity (includes resistivity, concentration, salinity and TDS) • Sodium • Flouride • Chloride • Calcium Hardness, Oxygen Scavenger, Ammonia • With automatic temperature compensation (ATC) wherever applicable | • pH • ORP • Conductivity • Dissolved Oxygen • With automatic temperature compensation (ATC) wherever applicable. | |
| Outputs | • 4-20mA active - 2 • Relay ouputs - 2; 1.0 Amp, dry contacts | • 0/4-20mA active - up to 8 • Relay ouputs - 3 (up to 6); 5.0 Amp, dry contacts • Outputs can be used for basic PID • Optional: MODBUS RTU • MODBUS RS 232 DeviceNet • Ethernet/IP • CANopen | • 0/4-20mA active - 4 • Relay ouputs - 3; 5.0 Amp, dry contacts • Optional: MODBUS RTU | • 0/4-20mA active - 2 • Relay ouputs - 2; 3.0 Amp, dry contacts • Wash relay -1 • Hold relay -1 • Alarm relay -1 • Relays can be used for P/PI controller | |
| Input Power supply | • 10 to 30 VDC • Optional or 100 to 240 VAC | • 10 to 30 VDC • Optional or 100 to 240 VAC | • 24 VDC • Optional or 100 to 240 VAC | • 100 to 120 VAC and 200 to 240 VAC | • 80 to 250 VAC |
| User interface | 2 line by 16 character back lit LCD display with keys for menu navigation | 2 line by 16 character back lit LCD display keys for menu navigation | • Display: 4.3 Inch color graphics with high contrast • 7 Key menu navigation • USB • Multiple languages | Large bright backlit LCD provides a 3 line parameter display | • Backlit 14 segments display with symbols for status information, with keys for menu navigation • On/Off selectable with four levels of brightness control |
| Enclosure type | • NEMA 4X • Wall mount • Panel mount ¼ DIN • Panel mount ½ DIN | • Wall mount; NEMA 4X • Panel mount: ¼ NEMA 4X • Panel mount ½ DIN NEMA 4X | • NEMA 4X • Pipe mount• Panel mount • Wall mount • UV resistant poly carbonate | • NEMA 4X • ½ DIN panel mount • Pipe mount | • NEMA 4X • ½ DIN panel mount • Pipe mount wall mount |
| Catalog # | Quote | Quote | Quote | Order | Order |
*Only available in North America
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