The Keller 35X HTC Pressure Transmitter is a piezoresistive high temperature transmitter that is suited for media temperatures up to 300°C. The pressure, acting onto the flush diaphragm, is transferred over an oil-filled capillary onto the silicon measuring cell. The capillary has the function of a cooling spiral, allowing media temperatures of up to 300°C. The temperature of the electronics, which can be read out with the PROG30 software, may not exceed 120°C. For highly aggressive media, KELLER offers pressure ports in different materials.

This Series is based on the stable, piezoresisitive transducer and a micro-processor electronics with integrated 16 bit A/D converter. Temperature dependencies and non-linearities of the sensor are mathematically compensated. With the READ30 software and the KELLER cable K-107, the calculated pressure can be displayed on a Palmtop, Laptop or PC. The READ30 software also allows the recording of pressure signals and the graphic display on the PC. Up to 128 transmitters can be hooked together to a Bus-system.

The micro-processor integrates a D/A converter of 16 bit for analog signal outputs of 4-20mA or 0 to 10 V. The output rate is 100 Hz (adjustable). The digital output is available on all transmitters with analog output. With the KELLER software READ30 and PROG 30, a RS485 converter (i.e. K-102, K-104 or K-107 from KELLER) and a PC, the pressure can be displayed, the units changed, a new gain or zero set. The analog output can be set to any range within the compensated range.