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PP905 is a one-pipe, direct-or reverse-acting pressure sensor, used with RP908/RP920 Controllers, to provide control of duct static, velocity or differential pressure in airflow applications. Replacement devices are available for most models.


  • Three-diaphragm design minimizes calibration shift with static pressure changes in velocity pressure applications.
  • Not sensitive to normal supply air variations.
  • Continuous static, total, velocity, or differential pressure indication available by using differential pressure gage.

Product Specifications

Static Pressure
Airflow Usage
0.021 cfm (9.9 ml/s)
Dimensions (in.)
8 in high, 9 in wide, 4 1/8 in deep
Dimensions (mm)
203 mm high, 228 mm wide, 105 mm deep
Maximum Safe Operating Pressure (psi)
25 psi
Maximum Safe Operating Pressure (kPa)
172 kPa
Temperature Range (F)
40 F to 120 F
Temperature Range (C)
4 C to 50 C
The setpoint determines the midpoint of the span.
Duct mount
Connection Size (in.)
Push-on barb for 1/4 in (6 mm) Diameter tubing
Pressure Ratings (psi)
Maximum Safe Static Pressure-- 28 in. wc; Output-- 3 to 15 psi
Pressure Ratings (kPa)
Maximum Safe Static Pressure-- 7 kPa; Output-- 21 to 103 kPa
Can be set for Direct Acting or Reverse Acting
Mainline Pressure Range (psi)
16 to 25 psi
Mainline Pressure Range (kPa)
112 to 175 kPa
Setpoint Range (psi)
0 in. wc. to 7 in. wc. (Adjustable)
Setpoint Range (kPa)
0 kPa to 1.7 kPa (Adjustable)
Span (Non-Adjustable) (in. wc)
2 in. wc.
Span (Non-Adjustable) (kPa)
0.5 kPa
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