Posted in | Pressure Sensors

Keller UK’s 33 X / 35 X Series High Precision Pressure Transmitters

The Series 33 X / 35 X pressure transmitters are developed based on the stable, floating piezoresisitive transducer and the newly developed XEMICS micro-processor which is integrated with 16 bit A/D converter. The calculated pressure can be displayed on a PC or laptop with the help of the KELLER cable K-107 and the READ30 software. Pressure signals can be recorded, and the graphics can be displayed on the PC with the help of the READ 30 software. 128 transmitters can be integrated to a Bus-system.

Non-linearities and temperature dependencies of the sensor are mathematically compensated. 16 bit D/A converter can be integrated in the XEMICS processor for outputting the analog signal. Commercial dead weight testers are used for calibrating the transmitters. Manometers indicate an uncertainty or accuracy of about 0.025%. The full-scale output of transmitters can be matched with any standard according to the customer’s choice by correcting the gain with the PROG30 software.


The specifications of the Series 33 X / 35 X pressure transmitters are:

Weight Series 33 X » 140 g, Series 35 X » 160 g, Series PD-33 X » 500 g
Dead volume change < 0.1 mm3
Pressure endurance 10 Million pressure cycles 0…100 %FS at 25 °C
Shock endurance 20 g (11 ms)
Vibration endurance 20 g (5...2000 Hz, max. amplitude ± 3 mm), according to IEC 68-2-6
Protection - IP 65 optional: IP 67 or IP 68 (with cable)
Material in contact with media Stainless steel AISI 316L/Viton
Storage-/Operating temperature range -40…120 °C
Load resistance (W) <(U - 8 V) / 0,025 A (2-wire), and > 5’000 (3-wire)
Insulation 10 MW / 50 V, optional 300 V (2-wire only)
Electrical connection MIL C-26482-Plug (6 pole), Binder-Plug 723 (5 pole), and DIN 43650 Plug (4 pole)
CE-conformity EN 61000-6-1 to -6-4 / EN 61326-2-3
True output rate 400 Hz
Resolution 0.002% FS

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