Clog free long lasting junction

  • The unique, free-flowing liquid-to-liquid junction offers a stable, drift-free measurement.
  • Easy-to-clean junction that avoids clogging by simply pressing the cap and flushing the junction area.  
  • Sure-Flow junction electrodes are compatible with samples containing organic compounds, proteins, heavy metals, and other compounds that react with silver such as bromides, iodides, cyanides and sulfides.
  • Silver chloride Sure-Flow electrodes can be used on tough samples that do not require a double junction electrode to prevent contact with silver.
  • ROSS Sure-Flows are also available as semi-micro pH and reference half cell electrodes.

Featured electrodes:

View all
 High performance in all samplesFast response –
even in difficult
samples
For all samples including solventsFast response in difficult samples & soils
 ROSS Sure-Flow combo pH glass body electrodesROSS Sure-Flow combo pH epoxy body electrodesSure-Flow combo pH glass body electrodesSure-Flow combo pH epoxy electrodes
 ROSS Sure-Flow combination pH electrode with glass bodyROSS Sure-Flow combination pH electrode with epoxy bodySure-Flow combination pH electrode with glass bodySure-Flow combination pH electrode with epoxy body
 
  • Sure-Flow junction prevents clogging
  • For soil, sludge, colloids, viscous material and organic solvents
  • Ideal for soil samples
  • Durable epoxy design
  • For TRIS, sulfides and proteins
  • For soil, sludge, colloids, and viscous material
  • Chemical resistant glass body
  • Rugged, durable epoxy design
  • Has removable bulb guard
Product SKU number8172BNWP8165BNWP
9172BNWP9165BNWP
pH Range0-140-140-140-14
pH Precision0.010.010.020.02
Temp. Range0-100°C0-100°C0-100°C0-100°C
Internal ReferenceROSSROSSAg/AgClAg/AgCl
JunctionSure-FlowSure-FlowSure-FlowSure-Flow
Fill Solution (Cat. No.)3 M KCl (810007)3 M KCl (810007)4 M KCl w/ Ag/AgCl (900011)4 M KCl w/ Ag/AgCl (900011)
Dimension D (Dia) L (Length) T (Tip)

L - 120 mm
D - 12 mm

L - 120 mm
D - 12 mm

L - 120 mm
D - 12 mm

L - 120 mm
D - 12 mm

Connector TypeBNC Waterproof

BNC Waterproof
EDIN Waterproof

BNC WaterproofBNC Waterproof
  Increase your productivity by adding accessories to your benchtop or portable meter. Meter Accessories ›

The Sure-Flow technology has a lever that allows reference solution to be flushed from a spring-compressed junction. This enables easier clog-free maintenance when measuring difficult samples.

Sure-Flow technology junction press to release
Step 1: Press and hold top of the electrode
Sure-Flow technology spring-compressed junction to flush
Step 2: The spring-compressed junction opens to release fill solution through a ¼ inch gap
Sure-Flow technology spring-compressed junction release
Step 3: When pressure is released from the top of the electrode, the junction closes the gap to a nominal sleeve junction spacing

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.

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.

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.

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.

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.

Find your software