Measure ORP simply and accurately with Thermo Scientific™ Orion™ ORP standards for Redox/ORP electrodes

• Does not contain hazardous chemicals
• Included in the new ASTM ORP method
• Used as relative mV standard to calibrate the offset of sample

Orion™ OPR standards are designed for use with ORP/ATC Triode™ electrodes and Sure-Flow™ ORP electrodes.

Stable for up to a year if unopened and can be used directly from the bottle with no mixing or diluting.