389 and 389VP pH/ORP Sensors

389 and 389VP pH/ORP Sensors

389 and 389VP models have triple reference input ensuring protection of reference element against ions, such as ammonium, chlorine, cyanide and sulphide ions being a part of technology process. Both models have an external ceramic connection of ring structure located along pH/ORP sensitive membrane. There are two electrode types available: semi-sphere and glass for high pH values. AccuGlass semi-sphere is a standard option for both models and ca be used for various application areas. Semi-sphere is also used in combination with glass for high pH values. 389 and 389VP models are placed in molded Tefzel casing with round cross-section O-rings made of Viton that ensures indestructibility and chemical resistance of each sensor. Complete water-proofing prevents leakage or high-humidity issues characteristic of other pH/ORP sensor design. Simplified design developed for convenience purposes does not require electrolyte refilling (KCl) or other complex maintenance procedures.

Technological information and specifications
Structural materials  Tefzel, glass, ceramics, Viton
Process connection of sensor  2 x 1” MNPT (on the front and rear parts of the sensor)
Percentage linearity as per pH range  Option 10 Option 11
0-2 pH 94% 94%
2-12 pH 99% 97%
12-13 pH 97% 98%
13-14 pH 92% 98%
Measurement range  pH: AccuGlass 0-14

Redox: from  -1500 to +1500 mV

Temperature compensation  Automatic, from 0° to 85°C

Temperature compensation is not required for 389 Redox or 389VP Redox models during operation with 1060, 1023 or 1181 Redox models

Maximum pressure / nominal temperature  790 kPa (absolute) at 65°C
Cable  389 model: 5 m or 8 m (only for sensor with in-built preliminary amplifier)

389VP model: Relevant VP cable shall be used.

Weight / gross weight  0.45 kg/0.9 kg

389 and 389VP models have triple reference input ensuring protection of reference element against ions, such as ammonium, chlorine, cyanide and sulphide ions being a part of technology process. Both models have an external ceramic connection of ring structure located along pH/ORP sensitive membrane. There are two electrode types available: semi-sphere and glass for high pH values. AccuGlass semi-sphere is a standard option for both models and ca be used for various application areas. Semi-sphere is also used in combination with glass for high pH values. 389 and 389VP models are placed in molded Tefzel casing with round cross-section O-rings made of Viton that ensures indestructibility and chemical resistance of each sensor. Complete water-proofing prevents leakage or high-humidity issues characteristic of other pH/ORP sensor design. Simplified design developed for convenience purposes does not require electrolyte refilling (KCl) or other complex maintenance procedures.

Technological information and specifications
Structural materials  Tefzel, glass, ceramics, Viton
Process connection of sensor  2 x 1” MNPT (on the front and rear parts of the sensor)
Percentage linearity as per pH range  Option 10 Option 11
0-2 pH 94% 94%
2-12 pH 99% 97%
12-13 pH 97% 98%
13-14 pH 92% 98%
Measurement range  pH: AccuGlass 0-14

Redox: from  -1500 to +1500 mV

Temperature compensation  Automatic, from 0° to 85°C

Temperature compensation is not required for 389 Redox or 389VP Redox models during operation with 1060, 1023 or 1181 Redox models

Maximum pressure / nominal temperature  790 kPa (absolute) at 65°C
Cable  389 model: 5 m or 8 m (only for sensor with in-built preliminary amplifier)

389VP model: Relevant VP cable shall be used.

Weight / gross weight  0.45 kg/0.9 kg