Combination electrodes are designed such that both the pH measuring electrode and the reference electrode are built into one probe. Ease of handling and smaller sample requirements make this a very popular design.

Standard length with 12 mm O.D. insertion stem. Fast response. 0–12 pH

Longer length with 12 mm O.D. insertion stem. Electrode has a rugged dome bulb for both laboratory and industrial applications. 0–12 pH

Longer length with 12 mm O.D. insertion stem. HT-3 Bulb Glass. 0–13 pH

This electrode model is also offered with HT-4 Bulb Glass which provides the lowest Na⁺ error with highly alkaline samples. Excellent durability and resistance to corrosive chemical attack at very low and high pH values. 0–14 pH

This electrode features a built-in refillable salt bridge between the Ag/AgCl reference cell and the liquid sample. Very useful where Ag⁺ and Cl^- contamination of the sample must be avoided. Salt bridge filled with 10% KN0₃ for shipment. HT-3 Bulb Glass. 0–13 pH

Primarily there are four things we need to know in order to correctly fill your order.

1. Electrode Model Number — Each electrode has a ten character model number.

2. Cable Type — All lab electrodes are equipped with Type A, low noise, 3 mm, coaxial cable. Place the A after the electrode number.

3. Cable Length — The cable length is expressed in feet immediately after the cable type. Example: "-A03" stands for a three foot cable which is standard for all electrodes in this catalog. Follow model numbers by a"-DK" for a threaded electrode cap.

4. Connector — The cable length is followed by a two letter designation for the proper connector. All connectors are available. If you do not see what you need on this page, give us the make and model numbers of your pH meter and we will supply the proper connector.

Example: C13PIA-521-AO3SC