Keller Swiss-Built Series 25HT High temperature pressure transmitter

This piezoresistive pressure transmitter fits 19 mm (3/4”) manifold pressure ports for applications in bio-reactors or autoclaves. The transmitter is compensated up to 150 °C and may be operated continuously or sterilised at this level, including the special circuit electronics. The transmitter circuit is based on the “PROGRES” programmable KELLER amplifier. In the
25HT-PRO version, the programming leads are taken to the 7-pin connector, thus allowing to reprogram the transmitter at any time, altering the zero and the range by a factor of 5, using the hand held PP-96 Progres Programmer. The cable outlet version does not provide these control lines and cannot be reprogrammed. The transmitters are normally supplied in absolute versions. Gauge versions are available upon request.
SPECIFICATIONS
Pressure Ranges (FS)
Version Absolute / Gauge 0,5 1 2 5 10 20 bar
Overpressure 2 3 4 8 15 30 bar
Typ 2-Wire 3-Wire 3-Wire
Excitation (U) 8…28 VDC 8…28 VDC 13…28 VDC
Signal Output 4…20 mA 0…20 mA 0…10 V
Load Resistor (Ω) ≤(U-8V)/0,02A ≤(U-5V)/0,02A >2kΩ
Linearity 0,2% FS typ. 0,5% FS max.
Stability 0,1% FS typ. 0,2% FS max.
Operating Temperature 20…150°C
- Temp. Coeff. of Zero 0,015% FS/°C
- Temp. Coeff. of Sensitivity 0,015%/°C
Electrical Connection Binder Plug Series 723; 8-pole
Material in Contact with Medium Stainless Steel AISI 316, Viton- or Silicone O-Ring
Protection IP65
Options - Cable with reference tube for gauge version
- Platinum diaphragm, Hastelloy housing
- Programmable Version (25HT-PRO)

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