TpH-D
Digital differential pH-sensor.
Robust digital differential pH sensor for operation on TriBox controllers and HS100 DIN rail module. The closed design ensures separation of the pH electrode reference system from the medium to be measured, thus excluding electrode poisoning. A dirt-resistant salt bridge minimizes cleaning efforts and prevents dilution of electrolytes. The sensor therefore achieves an extremely long service life even in heavily contaminated media. TpH-D is available with a 10 m, 2 m or a 0,5 m fixed cable. |
Measurement technology | pH electrode with additional reference pH electrode in pH7 buffer solution | ||
Measurement principle | Potentiometry | ||
Parameters | pH value, temperature | ||
pH measuring range | 0...14 pH | ||
Resolution | 0.01 pH | ||
Measurement accuracy | ± 0,06 pH | ||
Intrinsic error | pH1 | ± 0.05 pH | |
pH7 | ± 0.05 pH | ||
pH13 | ± 0.35 pH | ||
Linearity measurement error | ± 0.1 pH | ||
Repeatability | pH1 | ± 0.1 pH | |
pH7 | ± 0.05 pH | ||
pH13 | ± 0.1 pH | ||
Output signal fluctuation | pH7 | ± 0.025 pH | |
pH4 | ± 0.05 pH | ||
Warm-up time | < 5 min | ||
Drift | Short time drift 24 h | < 0,03 pH | |
Long time drift 1 week | < 0,05 pH | ||
10% time and 90% time | T10 ascending | < 2 s | |
T10 falling | < 2 s | ||
T90 ascending | ≤ 5 s | ||
T90 falling | ≤ 5 s | ||
Temperature compensation | Pt1000 | ||
Measurement interval | 2 s | ||
Housing material | PPS / PET / NBR | ||
Dimensions (L x Ø) | ~ 225 x 32 mm | ~ 8.9˝ x 1.3˝ | |
Weight | 180 g | ~ 0.4 lbs | |
Interface | RS-485, Modbus RTU | ||
Power consumption | 0.2 W | ||
Power supply | 12...24 VDC (± 10 %) | ||
Connector | 8-pin M12-plug | ||
Sensor cable | 2 m and 10 m | ||
Maintenance effort | Typically ≤ 0.5 h/month | ||
Calibration/maintenance interval | Typically 4 weeks | ||
System compatibility | Modbus RTU | ||
Warranty | 1 year (EU & US: 2 years) on electronics; wearing parts are excluded from the warranty | ||
Max. pressure | 3 bar | ~ 43.5 psig | |
Protection type | IP68 | NEMA 6P | |
Sample temperature | +2...+40 °C | ~ +36 °F to +104 °F | |
Ambient temperature | -5...+55 °C | ~ +23 °F to +131 °F | |
Storage temperature | 0... +80 °C | ~ +32 °F to +176 °F | |
Inflow velocity | 0...3 m/second | ~ 0...10 fps | |
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