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Differential Pressure Monitor

PascalVision 20 Differential Pressure Monitor, Switch and Controller. Range -20 ... +20 Pa.
PascalVision 100 Differential Pressure Monitor, Switch and Controller. Range -100 ... +100 Pa.
The PascalVision is a high precision instrument for measuring, controlling and to display pressure differences in the low range, for example in cleanroom systems.
The measurement method is based on the principle of mass flow measurement.
This method requires no moving parts (e.g. diaphragm) and so enables very high accuracy, reproducibility,
reliability and long-term stability. The instrument is very small and designed for cleanroom compatibility.

Differential Pressure Monitor

Model  Description 
PascalVision 20  Differential Pressure Monitor - Controller. -20 - +20 Pa
PascalVision 100  Differential Pressure Monitor - Controller. -100 - +100 Pa
Current differential pressure indicated on a
LCD-Display.
No mechanical moving parts (e.g. diaphragm) in the measurement cell.
Very high accuracy </=0.25% FS (full scale) or </=1.5%m.V.(measured value) whichever is larger
Very low offset drift <0.1Pa/year.
No hysteresis.
Insensitive to vibrations.
Not damaged by high differential pressures
up to 2bar


Different output signals, selectable.
Analog output signal can be configured and calibrated.
Ease of calibration (Zero and Gain).
Clean room compatible designed.
Customer specific configuration is possible.
Quick and simple programming with PascalTool-Palm or PascalTool-Win.
Easy compensation of hose length by configuration software.
Main Features


Differential Pressure Monitor specification
Type PascalVision 20 PascalVision 100
Article-No. 1116844 1116845
Measurement range -20 ... +20 Pa -100 ... +100 Pa
Max. resolution 0.016 Pa 0.07 Pa
Measurement interval 150 ms ... 1350 ms 150 ms ... 1350 ms
Time constant 10 ms 10 ms
Measurement accuracy (at 20°C/50%RH)
(m.V. = of measured value)
< 4 Pa = ± 0.05 Pa
>/= 4 Pa = ± 1,5% m.V.
< 17 Pa = ± 0.25 Pa
>/= 17 Pa = ± 1.5% m.V.
Temperature effect < 0.05% m.V./°C < 0.05% m.V./°C
Atmospheric pressure effect (at 1013.25 hPa) 0.1% m.V./hPa 0.1% m.V./hPa
Hysteresis 0.00% 0.00%
Offset drift (at constant Temp. 20°C) < 0.1 Pa/year < 0.1 Pa/year
Max. permissible differential pressure ± 2 bar ± 2 bar
Max. mass flow through the sensor 120 sccm (0.12 liter/min) 370 sccm (0.37 liter/min)
Operating temperature range 0 ... 50°C 0 ... 50°C
Analog output (configurable and calibratable) 0 ... 10 V, 2 ... 10 V (load to ground >10 kOhm)
0 ... 20 mA, 4 ... 20 mA (load <500 Ohm)
Digital interface RS 232 (ASCII-string or complex protocol)
Power supply 10 ... 35 VDC 10 ... 35 VDC
Power consumption max. 1.2 W max. 1.2 W
Protection IP 54 / EMC IP 54 / EMC