Digital Pressure SensorAP-20 series


Main Unit, Negative-pressure Type, -99 kPa

[Discontinued model]

This model has been discontinued.

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LED-type digital pressure sensor (negative-pressure model)

Rated pressure

0 to -760 mmHg, 0 to -99 kPa, 0 to -14.5 PSI, 0 to -1.00 bar

Fluid type

Air or non-corrosive gases

Type of pressure

Gage pressure


3-digit 7-segment LED (character height: 8 mm 0.315")*1, display cycle: 5 times/sec.


±1 % of F.S. or less


5 ms

Temperature characteristics

±3 % of F.S. or less of the detected pressure at 25 °C 77 °F within the temperature range of 0 to +50 °C 32 to 122 °F.

Display resolution

5 mmHg/1 kPa/0.1 psi/0.01 bar


Control output

Maximum NPN open-collector output: 100 mA (40 V or less), residual voltage: 1 V or less, 2 outputs


Power voltage

12 to 24 VDC ±10 %, Ripple (P-P) 10 % or less

Current consumption

45 mA or less

Environmental resistance

Pressure resistance

5 kgf/cm2*1

Ambient temperature

0 to +50 °C 32 to 122 °F

Relative humidity

35 to 85 % RH (No condensation)

Vibration resistance

10 to 55 Hz, Double amplitude 1.5 mm 0.06", 2 hours in each of the X, Y, and Z directions

Shock resistance

100 m/s2 (Approx. 10 G), 3 times in each of the X, Y, and Z directions


Front case: polycarbonate, pressure port: die-cast zinc


Main unit: Approx. 65 g (excluding the cable; Approx. 105 g including the 2 m cable)

*1 When the AP-21A is in the "Std," "psi," or "bar" unit mode, negative pressure is not displayed with a minus sign.

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Process Controls / Process Sensors