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

Diffusion plate

Air or non-corrosive gases

Fluid type

Type of pressure

Gage pressure

Polarizing plate


45 mA or less

Display power

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

Display resolution

5 mmHg/1 kPa/0.1psi/0.01bar


±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.

Control output

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


Connection points

±1% of F.S. or less




Power voltage

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

Current consumption.

45 mA or less

Environmental resistance

Operating temperature range

0 to +50°C32 to 122°F

Operating ambient humidity

35 to 85% RH (No condensation)


10 to 55 Hz, 1.5 mm 0.059" double amplitude for 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

Pressure resistance

5 kgf/cm2*1


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

Weight (including the cable)

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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