Calibrating Orp Probes?

[CraigT]

Is there any way that an orp probe can be calibrated or tested to make sure its reading right?

Cheers

[Dursley93]

hi Craig

The iks comes with calibration fluid and a plug in place of the probe for the calibration process.

Don't know what other makes do but would have thought somthing along the same lines.

Phil hth :unsure:

[dod]

Craig,

If you can make (with extreme care and precision) a solution of known ORP (phosphate?) content you have a calibration standard. The reliability of your calibration depends on the accuracy of the standard solution.

Dod

[dod]

or if this is for redox potential I think that you can make standards from a hydroquinone/quinhydrone solution, but the chemicals would probably be be very hard to come by and it needs to be made up fresh every time. Probably best to buy a commercial standard solution at the end of the day....

[uda]

As Dod says, buy some.

Aquamedic do one: part number 230.24 (REDOX Calibration liquid 230mV) with an SRP of £3.34.

Any Aquamedic stockist should be able to get this in for you.

HTH

Andrew

[iain360]

Aquamedic do one: part number 230.24 (REDOX Calibration liquid 230mV) with an SRP of £3.34.

Any Aquamedic stockist should be able to get this in for you.

HTH

Andrew

Just bumping this up as I received an ORP probe the other day. Now as this thread is rather old, does anyone know know if any sponsors stock the above item?

Cheers

[keith hellyar]

Sponsor Reefdreams sell sachets of 400mv calibration solution made by Pinpoint. Use once to ensure accuracy. After use you can leave the sachet exposed to air for for a few hours and it makes an effective Probe cleaner.

Keith

[iain360]

Thanks Keith