Honeywell HP970 Catalog Page

Pneumatic Humidstats

C3225

N.C.

M

M B

HUMIDIFIER

VALVE

SUPPLY

HP972B

HP970 Pneumatic Humidistat

Two-pipe, single setpoint, pneumatic humidistat used to provide
proportional control of pneumatic valves on humidification or
dehumidification systems.

• Durable HP970 series humidistat.

• Pilot operated for high capacity.

• Direct Acting (DA) and Reverse Acting (RA) models are available.

• Vertical or horizontal mounting.

• Backplate has molded air connections; no separate fittings needed.

• Variety of cover finishes and display styles available.

HP970 Typical Piping

Application: Humidity
Dimensions, Approximate: 3 1/4 in. high x 2 in. wide x 1 5/8 in. deep

(83 mm high x 51 mm wide x 41 mm deep)

Airflow Usage: 0.011 scfm (5.2 mL/s)
Maximum Operating Temperature:
Maximum Storage Temperature: -30 to +150 F (-34 to +66 C)
Maximum Operating Pressure:

-

Product Number Action

HP970A1009/U Direct Acting 2 15 to 75% RH 3 to 15% RH Single Order Cover Separately

HP970B1007/U Reverse Acting 2 15 to 75% RH 3 to 15% RH Single Order Cover Separately

HP970B1015/U Reverse Acting 2 65 to 95% RH 3 to 15% RH Single Order Cover Separately

45 F to 125 F (7 C to 52 C)

25 psi (170 kPa)

Number of
Pipes

Scale Range (%
RH)

Accessories:

AK3863-Honeywell Thermostat Tool Kit, TP970/TP900
CCT729A-Gauge Adapter for Calibration. Add 305965 0 to 30 psi gauge

for Complete Tool.

CCT735A-Thermostat Cal bration Tool includes Allen wrench for cover

installation.

305965-1-1/2 in. diameter, 1/8 NPT center stem back mount Pressure

Indicating gauge (0 to 30 psi scale) with ±4% accuracy

14002430-001-Thermostat Guard
14003192-001-Wallplate adapter kit. Adapts HP970 or TP970 series

humidistats to HP900 and TP900 flush mounted and TP910 series
flush or surface mounted installations

14004406-124-Humidistat Cover assembly Satin Chrome with setpoint

display and Honeywell logo for vertical mounting, scale range 15 to
75% RH

Replacement Parts:

14001865-001-Filter Cartridge Assembly
14002053-001-Back Plate Assembly
14002573-001-Modernization Kit to convert all 1 & 2 pipe Honeywell &

competitive pneumatic humidistats to TP970, TP971A, TP972, TP973,
TP974, TP9600 family; HP970, HP971 and HP972

Throttling Range
(% RH) Setpoint Comments

Pneumatic

Controls

70-6910 643