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SE 554 Memosens pH Sensor
High accuracy, stability, rapidness, and a long life cycle are achieved by the special design. Through 2 open junctions, the reference system is in direct contact with the measured medium. There is hardly any risk of contamination or blocking of the junction. The high content and special distribution of potassium chloride in the polymer reduces measurement disturbances which could be caused by liquid junction potentials.
∎Technical Specification
| pH Sensor Range | 0 - 14 |
| Temp Range | 0 ... 130º C |
| Pressure | 0 ... 10 bar |
| Temperature detector | NTC 30 kohms |
| Sensor material | Alpha glass |
| Reference system | Ag/AgCl, polymeric electrolyte |
| Junction | Hole (2 x) |
| Length | 120 mm / 225 mm/ 325 mm / 425 mm |
| Process adaptation | PG 13.5 |
| Sensor connector | Memosens |
| ATEX marking | II 1 G Ex ia IIC T3 / T4 / T6 |
| FM marking | IS for Class I, Division 1, Groups A, B, C, D; Class I, Zone 0, AEx/Ex ia IIC T6 ... T4 NIFW for Class I, Division 2, Groups A, B, C, D; Class I, Zone 2, IIC T6 ... T4 |
SE 557 Memosens pH Sensor
Elimination of typical junction problems resulting in high measurement accuracy in ultrapure water as well as in heavily polluted media and at high temperatures. Integrated, refillable liquid electrolyte reservoir. 2 ceramic junctions, self cleaning due to pressurization (continuous outflow of electrolyte).
∎Technical Specification
| pH Sensor Range | 0 - 14 |
| Temp Range | NMSN: –20 … +100 °C NMSH: 0 … +135 °C |
| Pressure | –1 … +6 bar |
| Temperature detector | NTC 30 kohms |
| Sensor material | NMSN: Alpha glass; NMSH: Omega glass |
| Reference system | Ag/AgCl, polymeric electrolyte |
| Junction | Ceramic (2 x) |
| Length | 120 mm / 250 mm / 450 mm (NMSN) |
| Sensor connector | Memosens |
| ATEX marking | II 1 G Ex ia IIC T3 / T4 / T6 |
| FM marking | IS for Class I, Division 1, Groups A, B, C, D; Class I, Zone 0, AEx/Ex ia IIC T6 ... T4 NIFW for Class I, Division 2, Groups A, B, C, D; Class I, Zone 2, IIC T6 ... T4 |
