GH13P

The AVL GH13P is a piezoelectric cylinder pressure sensor for combustion analysis, made for diesel engines. Fitted into AVL's M8 glow-plug adaptor AG04, it gives an almost flush installation through the glow-plug bore, so pressures up to 250 bar can be measured without pipe oscillations. AVL makes the adaptor dimensions to each customer's engine. The sensor can also be fitted directly into a 4.3 mm front-sealed bore.

The GH13P uses AVL's gallium orthophosphate (GaPO4) crystal. AVL rates it at 0 to 250 bar (300 bar overload) with a nominal 16 pC/bar, a natural frequency of about 115 kHz and an operating range of -40 to 400 C. An M3 x 0.35 cable connector keeps the tool clearance small. A built-in sensor identification (SID) works with AVL's Sensor Data Management (SDM).

The sensor needs a charge amplifier or an indicating system with charge inputs. AVL's data sheet lists the CI31, CI3V and E124 cables, the CC31 coupling, the AG03, AG04 and AH13 glow-plug adaptors, and mounting tool set TS21. The GH13P data sheet dates from 2011, and the sensor no longer appears on AVL's current pressure-sensor page, where the GH14P is the M3-connector glow-plug-adaptor sensor.