Hp971 Pneumatic Humidity Sensor; Humidity - Honeywell Pneumatic Controls Engineering Manual

Humidity Sensors

HP971 Pneumatic Humidity Sensor

HP971A One-Pipe Application
HP971A

HUMIDITY

SENSOR
M B
4
8 9
2 1
3
N.C.
RP920A
CONTROLLER
RA
HUMIDIFIER
VALVE
Application Type: Humidity Sensor
Dimensions, Approximate: 3 1/4 in. high x 2 in. wide x 1 5/8 in. deep
(88 mm high x 51 mm wide x 41 mm deep)
Action: Direct Acting
Airflow Usage: 0.022 scfm (10.4 mL/s)
Number of
Product Number Pipes
HP971A1008 1 or 2
HP971A1024 1 or 2
46 customer.honeywell.com
M
M5569
Sensor Range Mounting
15 to 75% RH Vertical or Horizontal Wall Mounting or
Mounted in Duct Sampling Chamber
15 to 85% RH Vertical or Horizontal Wall Mounting or
Mounted in Duct Sampling Chamber
One- or two-pipe, direct-acting humidity sensor used with RP908/
RP920 Controllers to provide proportional control of pneumatic
valve or damper actuators in systems requiring humidification or
dehumidification control.
• Corrosion resistant materials.
• Simple plug-in air head connections.
• Factory calibrated.
• Continuous relative humidity indication available by using receiver
gage.
• Integral or external restriction can be used.
HP971A Two-Pipe Application
RA
HP971A
HP970B
HUMIDITY
HIGH LIMIT
SENSOR
(OPTIONAL)
M B M B
M
4
8
2
3 1
RP920A
CONTROLLER
N.C. RA
HUMIDIFIER
VALVE
Connections: Push-on barb for 5/32 in. (4 mm) O.D. tubing
Maximum Operating Temperature:
Maximum Operating Pressure:
Output Pressure Range: 3 psi to 15 psi (21 kPa to 103 kPa)
Supply Pressure: 16-21 psi (110-145 kPa)
Description
Pneumatic Humidity Sensor, 15
to 75% RH range
Pneumatic Humidity Sensor, 15
to 85% RH range
70-6925
M
9
M5568A
125 F (52 C)
25 psi (172 kPa)
Comments
Order Cover
Separately
Order Cover
Separately