HUMIDITY
512
HUMIDITY
9
WHEN YOU NEED IT RIGHT, RIGHT NOW, CALL KELE.
kele.com888-397-5353 USA
March 2014
2% WALL, DUCT AND OSA HUMIDITY TRANSMITTERS
H_20K SERIES
Duct and OSA with TT option only
Temperature
4-20 mA
signal
Power supply
24 VDC
Humidity
4-20 mA
signal
T
V+
RH
Room, Duct, OSA (RH or RH-T)
Humidity
4-20 mA
signal
T
V+
Optional
temperature
sensor
RH
Power Supply
24 VDC
WIRING FOR RH ONLY AND "T" TEMPERATURE OPTION WIRING OR RH AND "TT" TEMPERATURE OPTION
MOUNTING ROOM AND DUCT SENSOR
ORDERING INFORMATION
MOUNTING OSA SENSOR
North
The transmitter should be mounted
preferably on the north side (Northern
Hemisphere) of a building under the eave,
not above windows or doors. The transmitter
should be mounted vertically with the sensor
slots pointing down.
aceplate
Plate
Mounting
Screws
Wire Access
Hole
Optional Customer-
Supplied Handy Box
Cover
Mounting
1/16 Allen Screws
DIAGRAM 1: The transmitter should be mounted so that the 9" (22.86 cm) probe is in the center of the
duct. The transmitter should be duct mounted away from fans, corners, heating and cooling coils, and other
equipment that will affect the measurement of relative humidity.
Diagram 2: The sensor should be mounted approximately 5' (12.7 cm) above the floor, on an interior wall, away from
any heating or cooling generating devices. Basic model comes with screw terminal block, two #6-32 screws for handybox
mounting, and two #6 x 1" screws for direct wall mounting. Cover screws are #6-32 with a 1/16 allen key head. Precautions
should be taken to prevent air infiltration from inside the wall.
MODEL DESCRIPTION
HW20K 2% beige room humidity transmitter, 4-20 mA output
HW21K 2% white room humidity transmitter, 4-20 mA output
HD20K 2% duct-mount humidity transmitter, 4-20 mA output
HO20K 2% OSA-mount humidity transmitter, 4-20 mA output
OPTIONS (Temperature Sensors or Transmitters)
-- No temperature sensor
T3 10,000Ω thermistor @ 77°F (25°C), Type III
T21
2252Ω thermistor @ 77˚F (26˚C), Type II
T22
3000Ω thermistor @ 77˚F (26˚C), Type II
T24 10,000Ω thermistor @ 77°F (25°C), Type II
T27
100,000Ω thermistor @ 77˚F (26˚C), Type II
T42 20,000Ω thermistor @ 77˚F (26˚C), Type IV
T63
1000Ω nickel SS flush mounted plate RTD @ 70˚F (26˚C), Type III (yellow leads)
T71 100Ω SS flush mounted plate RTD @ 32˚F (0˚C), Type III (blue leads)
T81 100Ω RTD @ 32˚F (0˚C), 385 platinum curve
T85 1000Ω 385 platinum RTD
T91 1000Ω 375 platinum RTD
TT-2 -20° to 140°F (-29° to 60°C) transmitter, 4-20 mA (duct and OSA only)
TT-3 0° to 100°F (-18° to 38°C) transmitter, 4-20 mA (duct and OSA only)
HD20K T3
Example: HD20K-T3 Duct-mount humidity sensor with 10 kΩ Type III temperature sensor
Diagram 1
Diagram 2
RELATED PRODUCTS PAGE
DCPA-1.2 Power supply, 120 VAC IN to 24 VAC/24 VDC OUT 994
DCP-1.5-W Power supply, 24 VAC IN to 24 VDC OUT 995
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