ROSS pH Electrodes

pH Electrodes

Not all pH Electrodes are created equal. It is critical that the electrochemical measurements you perform day-to-day are accurate and reproducible. You rely on your pH electrodes to measure your samples quickly and precisely, making them an essential part of your lab. Whether you’re testing samples in pharmaceuticals, food or general lab work, one incorrect reading can have devastating effects. Why take chances with a low quality electrode? The Thermo Scientific electrodes portfolio spans a vast range of industries and applications, and are categorised into digestible classifications to help you choose which electrode is best for your application.

Request information   View electrode features   Applications selection guide
 

Featured pH electrodes

8163BNWP

Thermo Scientific pH Electrode Families

The Thermo Scientific electrodes portfolio spans a vast range of industries and applications and includes the ROSS, NoCal, AquaPro, Double Junction, Economy, ATC and more. Use the electrodes features tabs below to help you make an informed choice.

Thermo Scientific™ Orion™ ROSS Ultra Combination Glass Body Extended Life pH Electrode

Conduct precise pH determinations with the Thermo Scientific™ Orion™ 8102BNUWP ROSS Ultra™ pH Electrode, a general purpose, top performance glass body combination electrode with waterproof BNC connector. The pH response is independent of temperature changes and can be used on any pH meter with a BNC connection.

8102BNUWP
8156BNUWP

Thermo Scientific™ Orion™ ROSS Ultra Combination Epoxy Body pH Electrode

Perform precise pH determinations with the Thermo Scientific™ Orion™ 8156BNUWP ROSS Ultra™ pH Electrode, a general purpose, top performance, epoxy body combination electrode.

Thermo Scientific™ Orion™ ROSS Combination Glass Body pH Electrode With Spear Tip

Calculate results three to five times more precise than those obtained with conventional electrodes with the Thermo Scientific™ Orion™ 8163BNWP ROSS™ Combination Spear Tip pH Electrode. This electrode provides stable readings to 0.01 pH in less than 30 seconds.

8163BNWP
800500U

Thermo Scientific™ Orion™ ROSS Ultra Glass Body Reference Half-Cell Electrode

Perform precise pH determinations for routine or research work with the Thermo Scientific™ Orion™ 800500U ROSS Ultra™ Reference Electrode, a half-cell electrode with glass body and pin-tip connector.

Thermo Scientific™ Orion™ pHR Process ROSS Electrode

Save time and money while achieving fast, accurate pH measurements in a variety of samples. With minimal maintenance and a longer lifetime, the Thermo Scientific™ Orion™ pHR Process ROSS™ Electrode offers high performance, reliability and longevity for a variety of applications, including pure water, wastewater and the treatment of wastewater from brewing operations.

Thermo Scientific™ Orion™ pHR Process ROSS Electrode
 

Browse pH electrodes by features

The types of available electrodes, the desired electrode features, and the compatibility of the electrode with the sample are all determining factors in selecting the right pH electrode. The following section provides the information needed to select the best pH electrode for your applications. The pH electrodes are available with a glass or epoxy body and a variety of electrode body styles, fill types, references, junctions, and connectors that suit your application. To learn more, see our pH electrodes separated by category and application below.

 

pH Electrode Style

Standard size
Standard
  • 12 mm electrode diameter for use in a wide variety of sample sizes
  • Accurate, chemically compatible, and fast response are all characteristics of the standard-sized glass bulbs
  • A variety of junctions available from Sure-flow to low-maintenance junctions
Semi-micro
Semi Micro
  • 6 to 8 mm electrode diameter for sample sizes down to 200 μL
  • Glass body semi-micro electrodes provide superior chemical resistance and can withstand high temperatures while allowing samples down to 200 μL
  • Variety of options to choose from, including epoxy body and glass micro-tip

 

pH micro and semi-micro electrodes ›
Micro
Micro
  • 1 to 5 mm electrode diameter for samples as small as 0.5 μL and containers as small as 384 well plates
  • Microelectrodes are designed to measure small volumes down to 0.5 μL 
  • These delicate electrodes permit insertion into small devices, such as 384 microwell plates
  • A variety of styles available, such as ROSS and septa-piercing tips

 

pH micro and semi-micro electrodes ›
Rugged bulb
Rugged bulb
  • When glass is required, the extra durable pH bulb prevents breakage
  • When durability and glass are needed, this bulb design provides all the chemical compatibility of glass electrodes with the added benefit of improved ruggedness

 

pH rugged electrodes ›
Spear tip
Spear Tip
  • For piercing solid or semi-solid samples and measuring small-volume samples
  • Spear tip pH electrodes can be used for piercing soft samples like cheese or fruit, or cutting through tougher samples such as meat 
  • For the toughest piercing samples, look for the KnipHe electrode.

 

pH spear tip style electrodes ›
Flat surface tip
Flat Surface
  • For measuring a solid surface or gel sample
  • Flat surface electrodes are epoxy body electrodes with a flat pH bulb that allows you to measure moist solid samples or small volumes
  • They can be used on samples such as meats, cheese, or in agar gel plates; available in single- or double-junction designs; either refillable or low-maintenance

 

pH flat surface tip style electrodes ›

pH Electrode Junctions

Sure-flow, sleeve, and laser-drilled hole (open)
Sure-flow, sleeve, and laser-drilled hole (open)
  • Best junction for dirty, difficult samples
  • Junction is clog-free and easy to clean
  • Ideal for thick or viscous samples, compatible with all sample types
Ceramic and glass capillary
Ceramic and glass capillary
  • Better junction for routine lab or field use
  • Junction is high quality and durable
  • Ideal for most applications and samples
Wick and glass fiber
Wick and glass fiber
  • Good junction for routine lab or field use
  • Junction used with rugged epoxy electrodes
  • Ideal for aqueous samples

pH Electrode References

ROSS reference
  • 0.01 pH precision
  • Best measurement response time
  • Ideal for virtually any sample type including TRIS, protein, and sulfide samples
  • Variety of body styles and types
  • Refillable or gel design
  • Best temperature response
Double junction Ag/AgCl reference
  • 0.02 pH precision
  • Better measurement response time
  • Ideal for TRIS, protein, and sulfide samples
  • Variety of body styles and types
  • Refillable, polymer or gel design
  • Good temperature response
Single junction Ag/AgCl reference
  • 0.02 to 0.1 pH precision
  • Good measurement response time
  • General purpose for everyday use
  • Variety of body styles and types
  • Refillable or gel design

Fill Type

Refillable
Refillable
  • Easy maintenance, filling solution required
  • Periodic filling and draining needed
  • Long expected life span
  • 0.01 to 0.02 pH precision
  • Best response time
  • 1 to 2 year warranty (6 months for Ag/AgCl micro electrodes)

 

pH Refillable Glass Electrodes ›
pH Refillable Epoxy Electrodes ›
Polymer filled (sealed)
Polymer filled (sealed)
  • Low maintenance, no filling solution needed
  • Sealed reference
  • Easy to use, ideal for most applications
  • 0.02 pH precision
  • Better response time
  • 1 year warranty

 

pH Polymer-filled Electrodes ›
Gel filled (sealed)
Gel filled (sealed)
  • Low maintenance, no filling solution needed
  • Sealed reference
  • Easy to use, general purpose
  • +/- 0.02 to 0.1 pH
  • Good response time
  • 3 to 6 month warranty

 

pH Gel-filled Electrodes ›

Body Style

Glass body
Glass body
  • Compatible with virtually any sample, including solvents
  • Easy to clean
Epoxy body
Epoxy body
  • Extremely durable and rugged to prevent breakage
  • Protective bulb guards
  • Choice of performance

Connectors

pH electrode connectors

Waterproof BNC
Waterproof BNC Compatible with any pH meter that has a BNC input; ensures a waterproof and secure connection with the Thermo Scientific Orion Star A series meters.
BNC
BNC Compatible with any pH meter that has a BNC input.
Screw cap
Screw cap
  • Electrode can be connected to a variety of meter inputs using a separate cable
  • Multiple adapters available as needed
Pin tip
Pin tip Compatible with meters that have a reference half-cell input.

 

ATC probe connectors

MiniDIN
MiniDIN Compatible with Thermo Scientific pH meters that have an 8-pin MiniDIN ATC input.
8-pin DIN
8-pin DIN Compatible with the Thermo Scientific Orion Star A meters and pH meters that have an 8-pin DIN ATC input.
RCA
RCA Compatible with Mettler Toledo™ pH meters that have an RCA input.

Featured videos

Resources

Related Information & Support

Contact Us















Contact Us