Combination electrode HANNA HI 1131B (glass)
Combination electrode HANNA HI 1131B (glass) Refillable pH electrode with glass body, double salt bridge and BNC connection. This electrode has a single ceramic diaphragm at the outlet of the reference electrode and a spherical pH-sensitive membrane made of high temperature glass. The electrode design is ideal for testing samples in the laboratory, beer or other liquids, and for general purposes. High temperature glass Measuring pH at very high temperatures damages the sensitive glass membrane and shortens its life. A general purpose glass pH electrode has a resistance of 100 MΩ at 25 °C, while a high temperature glass pH electrode has a resistance of approximately 400 MΩ at 25 °C. At elevated temperatures, the resistance of HI 1131B drops to approximately that of a general purpose glass electrode. HI 1131B is suitable for use in the temperature range from 0 to 100 °C Spherical membrane The spherical membrane is used for general purposes. Other membrane shapes include penetrating conical and flat for surface measurement. Glass body The glass body is ideal for laboratory use. Glass is resistant to various aggressive environments and is easy to clean. The glass housing also facilitates rapid heat transfer to the internal reference electrode. The voltage generated by the reference electrode depends on temperature. The faster the electrode reaches equilibrium, the more stable the potential of the reference electrode. Reference electrode with double salt bridge and single diaphragm HI 1131B is designed with a double salt bridge. pH electrodes are available with a single or double salt bridge. The salt bridge is an integral part of the electrical circuit. For a stable signal, the movement of ions must occur through a salt bridge. On the outside, the reference electrode has a single ceramic diaphragm. Ceramics is a porous material that easily fuses with a glass body and has a similar expansion coefficient. The permeability of a single ceramic diaphragm is 15-20 ml/hour. Other types of salt bridges made from other materials allow higher permeability values to be achieved. Fillable electrode HI 1131B – refillable electrode. For double salt bridge pH electrode, 3.5M KCl solution is used for filling. This solution does not contain silver, unlike a single salt bridge electrode. The absence of silver prevents the formation of sediment on the salt bridge and its clogging. A clogged salt bridge leads to drift in experimental data. BNC connector The HI 1131B uses a BNC connection. This is a universal connection that allows the electrode to be used on any pH meter with the same type of connection. Other types of connections are DIN, threaded, T-shaped and 3.5 mm. These types of connections are typically specific to a specific type of device and are not interchangeable. Manba: https://www.nv-lab.ru/catalog_info.php?ID=2680
- Parameter: Value
- pH range: 0 to 13
- Diaphragm / flow rate: ceramic, single / 15-20 µl/h
- Cable: coaxial; 1m (3.3’)
- Maximum pressure, bar: 0.1
- Case material: glass
- Application: general purpose, high temperature, general laboratory purposes
- Connector: BNC
- Recommended temperature range, °C: from 0 to +100 °C (from 32 to 212 °F)
- Matching contact: no
- Temperature sensor: no
- Amplifier: no
- Membrane shape: spherical (Ø9.5 mm)
- Digital: no
- Reference electrode: double, Ag/AgCl
- Electrolyte: 3.5M KCl