The EPP-40V is specifically designed for measuring pore water pressure in small diameter boreholes and standpipes. It is made of stainless steel with a built-in thermistor for temperature measurement and surge arrester for protection from lightning. For an easy cable connection a glass to metal solder pin connector is provided. The sensor is hermetically sealed with a vacuum of around 0.001 Torr inside it. A low air entry value ceramic flat filter is provided with a grain size of 40-60 microns unless specified otherwise.
FEATURES
- Reliable, accurate, low cost and simple to read.
- Easy installation in small diameter standpipes/ boreholes.
- Very small time lag.
- Hermetically sealed under a vacuum of 0.001 Torr; with stainless steel construction.
- Thermistor provided for additional temperature measurement.
- Negative pressure measurement possible.
- Transmission of signal as a frequency over long cable lengths.
- Protected against lightning spikes.
Model EPP-40V
Range (MPa) 0.35, 0.5, 0.7, 1.0, 2.0 Accuracy ± 0.2 % fs standard | ± 0.1 % fs optional Non linearity ± 0.5 % fs Over range limit 150 % fs of range Temperature limit -20° to 80°C Thermistor YSI 44005 or equivalent Dimension (Φ x L) 19 x 155 mm