pH and ORP electrodes

Amalgamated Instrument Co has released its pH and ORP (redox) electrodes with replaceable cartridges with a chlorine-resistant PVC housing.

Replacement of a worn-out pH or ORP electrode no longer means replacing the whole unit (with the attendant work of re-cabling etc). Instead the housing, temperature compensation sensor and cable can be left in place with only the sensing element being replaced. pH and ORP electrodes are consumable as the references are used up during use.

There is a range of three replaceable cartridges for pH measurement and a range of two replaceable cartridges for ORP (REDOX) measurement.

In the pH range, the single-junction, conical glass bulb is suitable for clean water applications up to 50 °C; the teflon-junction, round glass bulb is suited to applications up to 60 °C; and a teflon-junction, flat glass self-cleaning element is suited to applications with particulate matter up to 60 °C.

In the ORP (REDOX) range, the single-junction, platinum pin is suitable for clean water applications up to 50 °C, and the teflon-junction with platinum ring is suited to applications up to 60 °C.

The replacement cartridges are easily screwed into the housing. The PVC housings are available with 5 or 10 m cables and include a temperature compensation sensor (Pt100 RTD or Pt1000 RTD). 3/4" BSP threads on each end facilitate insertion into a process stream or for use in a tank with a suitable immersion assembly.