Meet your pH and ORP sample analysis challenges in the lab or in the field

Whether you're looking for a simple pH meter on a budget, or a powerful pH meter that simultaneously measures other parameters, our pH meters are designed to help you tackle even the most complex pH measurements with confidence.

We offer simple, complete systems that are seamlessly integrated to help address your measurement needs both in the field and in the lab. Our benchtop pH meters are an ideal choice for dedicated pH testing in water, process, research, and QA/QC samples.

Optimize your pH and ORP measurement process

High-quality meters are essential to the critical, routine tasks you perform every day. Our portfolio of benchtop and portable meters for pH, ORP, and temperature analysis are designed to help you measure samples across a wide range of applications.

Whether working in food and beverage, pharmaceuticals, energy and power, education, government, or water and wastewater management, you can count on Thermo Scientific Orion pH/ORP meters to help you meet regulatory standards, enable quantity control protocols are met, achieve your safety goals, and accelerate your path from challenge to solution.

Learn more about the regulatory requirements our benchtop and portable meters can assist with.

International standards for regulatory compliance requirements: 

Parameter

EPA

SM

ASTM

ISO

China MEP

USP

EP

AOAC

Other

pH

EPA 150.1 4500-H+(B) D1293 (A,B) 10523 GB/T 6920 <791> 2.2.3 973.41 FDA - 21 CFR 114.90

pH of soil/solid waste

SW-846 9040C & 9045D   D4972 10390 GB/T15555     994.16 - 994.18 USDA NRCS

Conductivity

EPA 120.1; SW-846 9050A 2510 (B) D1125 (A) 7888 n/a <645> 2.2.38 973.40 PSS-78 (salinity)

Dissolved oxygen

  4500-O (G) D888 (B, C) 17289; 5814 HJ506        

BOD

  5210 (B)   5815 HJ505     973.44  

Fluoride

SW-846 9214 4500-F (C ) D1179 (B) 10359 GB7484        

Ammonia

  4500-NH3
(D, E) 
D1426 (B) 6778          

Nitrate

Orion 601; SW-846 9210A 4500-NO3 (D)              

Sulfide

SW-846 9215 4500-S2 (G) D4658            

Cyanide

SW-846 9213 4500-CN (F) D2036 (A)            

Chloride

SW-846 9212 4500-Cl (D) D512 (C)   GB11896        

Bromide

SW-846 9211                
  SM: Standard Methods for the Examination of Water and Wastewater. APHA, AWWA, WEF.
  ASTM: American Society for Testing and Materials
  ISO: International Organization for Standardization
  USP: United States Pharmacopeia
  EP: European Pharmacopeia
  China MEP: China Ministry of Environmental Protection
  AOAC: Association of Official Analytical Chemists
  NRCS: Natural Resources Conservation Service
  PSS-78: Practical Salinity Scale of 1978
  FDA: US Food and Drug Administration
  USDA: US Department of Agriculture

Focused on ease of use
 

Ease-of-use with Orion multiparameter meters
  • Large, easy-to-view displays help make recording measurements easier and faster, and can help reduce documentation errors 
  • Onscreen instructions provide guidance on calibration and setup for more consistent operation with minimum training

Provide fast and reliable measurements

Reliable electrochemistry measurements in the field
  • Selectable read modes and reading stability indicator capture and notify when measurements are ready 
  • Calibration information shown with measurements and selectable alarms help to ensure measurement integrity

Assist with compliance requirements

Assist with compliance requirements
  • Measure pH, mV, relative mV, or ORP with temperature
  • Perform pH calibrations with automatic buffer recognition of NIST or DIN buffers and manual buffer value entry options
  • View up to 0.001 pH resolution, perform up to a six point calibration and record key calibration data including slope

pH and ORP benchtop meters

How do I choose the best Thermo Scientific meter for my most critical and daily applications?

Premium pH and ORP benchtop meters Advanced pH and ORP benchtop meters Basic pH and ORP benchtop meters

Premium

Advanced

Basic

Versatile, high-performance laboratory measurement system

Orion Versa Star Pro benchtop meters deliver rich functionality and features—you can optimally configure your meter system to meet changing requirements. Orion Versa Star Pro benchtop meters offer interchangeable measurement modules that allow multiple users to customize four separate channels to meet their specific requirements.

  • System access feature prevents undesired access through password protection with administrator and ten custom user accounts 
  • Onscreen instructions for meter calibration and setup walk users through operations with ease 
  • Data log collects 2000 data sets with time and date stamp, electrode ID, sample ID and user ID 
  • Onscreen measurement stability indicator lets you know exactly when your measurements are ready and is adjustable using custom stability and averaging settings
  • Applications: pharmaceuticals | biotechnology | food and beverage | industrial

Easy-to-use, dependable
laboratory meters

Perform your routine lab measurements quickly and easily with Thermo Scientific Orion Star A210 series benchtop meters. Selectable read modes, hold function, and measurement stability indicator give you flexibility and control over your testing. All critical data is shown with your measurements including temperature, date and time, read type, measurement stability, active calibration info, and power source. 

  • Informative, easy-to-read backlit graphic display provides clear onscreen instructions for calibration and setup
  • Eliminate the need for magnetic stir bars using a meter-controlled stirrer probe to uniformly mix solutions
  • Data log reliably collects and date- and time-stamps up to 2000 measurement sets with automatic or manual logging options
  • Applications: water | wastewater | chemical | contract testing

Economical, simplified
laboratory meters

Looking for a budget-friendly basic benchtop meter that doesn't compromise on reliability and quality? Our Thermo Scientific Orion Star A110 series meters are a simple, economical solution for your basic routine measurements. Featuring an emphasized measure key, selectable read modes, and measurement stability indicator, our basic meter series is designed to deliver measurements you can trust.

  • Simplified, easy-to-read display
  • User-friendly operation with basic calibration text prompts
  • Wall mountable with option to power using batteries or included universal power adapter
  • Applications: academic | environmental | power

 

pH and ORP portable meters

Our portable pH meters are designed to offer simple and accurate pH measurements in the field.

Premium pH and ORP portable meters Advanced pH and ORP portable meters Basic pH and ORP portable meters

Premium

Advanced

Basic

Rugged, easy-to-use
field meters

Whether you need single, dual, or multi-parameter measurement capabilities, our Orion Star A320 series portable meters offer an information-rich screen and user-friendly operation. This rugged, waterproof portable meter is ready to tackle the elements with you.

  • Waterproof, IP67 meter housing
  • Comprehensive keypad with menu-specific function keys and shortcut keys for quick and efficient meter navigation and control
  • Non-volatile memory preserves data, even with loss of power
  • Free Orion Star Com software facilitates data transfer to a computer via USB or RS232 connections
  • Applications: contract testing | environmental | food and beverage | industrial

Easy-to-use, dependable
field meters

Our Orion Star A220 series portable meters offer the reliability you need in a user-friendly package for your dedicated pH, conductivity, or dissolved oxygen testing needs.

  • Waterproof, IP-67 meter housing
  • Easy-to-read, backlit graphic display
  • Auto-Read and continuous read modes and measurement stability indicator
  • Free Orion Star Com software facilitates data transfer to a computer via USB or RS232 connections
  • Multi-language interface with new languages added through software updates

Budget-friendly, simplified
field meters

Get started with outdoor sample analysis in the field with our Orion Star A120 series economical portable meters. Enjoy a rugged design and user-friendly features at an affordable price.

  • Simplified, easy-to-read display
  • User-friendly operation with basic calibration text prompts
  • Selectable read modes and measurement stability indicator
  • Applications: academic | power

 

See our complete list of pH and ORP measurement offerings

pH and ORP
benchtop meters 

find the right benchtop meter for your pH and ORP measurement needs

The accuracy and reliability of your pH and ORP measurements depend on the instrumentation you use. Learn more about how you can identify the best match based on your required features, performance, specifications, and budget.

Learn more

pH and ORP
portable meters 

find the right portable meter for your pH and ORP measurement needs

Take your pH and ORP measurements to the field without sacrificing accuracy and reliability. Our portable meters are rugged and waterproof, and provide the dependable performance that your demanding applications require.

Learn more

Electrodes
and probes

view our selection of electrodes

The accuracy and reliability of your measurements depend on the instrumentation you use. Learn more about how you can identify the best match based on your required features, performance, specifications, and budget.

Learn more

Buffers
and solutions

view our buffer and solutions

We offer buffers, electrode storage solutions, electrode cleaning solutions, lab buffer kits, and electrode filling solutions for your measurement needs. Find the buffers and solutions that you need for your process.
 

Learn more


Choose the right pH meter for your lab

This interactive Orion pH Meter Selector Tool will help guide you to the ideal Thermo Scientific Orion benchtop or portable meter and accessories based on your requirements. 

Find your meter

Resources
Support

Knowledge Base: Certificates of Analysis and SDS for Orion, ROSS, AQUAfast, AquaMate, and AquaSensors products.

Orion Meters Software and Upgrades
Thermo Scientific Orion benchtop and portable meters are designed to help deliver accurate, consistent results, day after day. Boost productivity by upgrading your software today.

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