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Honeywell
H7012A,B
ROOM HUMIDITY SENSOR/
COMBINED ROOM HUMIDITY/TEMPERATURE SENSOR
PRODUCT DATA
FEATURES
• Pt 1000, BALCO 500 or 20kΩΩΩΩ NTC temperature
sensing element
• Wide sensing range
• Capacitance type sensing element for relative
humidity
• Plug-in design
GENERAL
The H7012A Room Humidity Sensor is a capacitance type
relative humidity sensor for wall mounting.
The H7012B Combined Room Humidity/Temperature Sensor
incorporates a capacitance type relative humidity sensor with
a Pt 1000, BALCO 500 or 20kΩ NTC temperature sensor in
one housing.
These sensors are used for control, indication and alarm
monitoring in room air conditioning installations.
Models
OS-No. Temperature Sensor Type
SPECIFICATIONS
General:
Power supply 24Vac, +20...-30%; 50/60Hz,
34Vdc, +20...-30%
Current consumption 20mA @ 24V
Ambient 0...50°C (+32...122°F), 5...95%rh
operating limits non condensing
Ambient -25...70°C (-13...158°F), 5...95%rh
storage limits non condensing
Dimensions see Fig. 2
Weight 130g
Case Plastic ( ABS )
flame retardend acc. to UL94-V0
Mounting Wall, surface or wall outlet box
Protection Standard IP 30 acc. to EN60529
Safety Class II acc. to EN60730-1
H7012A1009
H7012B1007 Pt 1000
H7012B1015 BALCO 500
H7012B1023
-
20kΩ NTC
EN0C-0610 0398R3-MA
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H7012A,B ROOM HUMIDITY / TEMPERATURE SENSOR
Temperature:
Temperature sensing
range 0...50°C (32...122°F)
Nominal value
Pt 1000 1000Ω @ 0°C
BALCO 500 500Ω @ 23.3°C
NTC 20kΩ @ 25°C
Accuracy
Pt 1000 ±0.3K acc. to DIN IEC 751 Class B
BALCO 500 ±0.4K @ 23.3°C
NTC ±0.2K at 25°C
Sensitivity
Pt 1000 ≈3.85Ω/K
BALCO 500 2Ω/K
Characteristic see EN0C-0603
Response time @ air velocity 0.02...0.07m/s
τ
0.5 Pt 1000
τ
0.5 Balco 500
τ
0.5 NTC
=50s
=140s
=134s
Overview
Following sensors can be applied for the following control
systems:
Relative Humidity:
Humidity sensing
range 5...95%rh
Output signal 0...1V / 0...10V = 0...100%rh
Output Impedance
1V range 183Ω
10V range 274Ω
Outputs short circuit protected
Sensitivity 10mV / %rh or 100mV / %rh
Accuracy
5...10%rh ±10%
10...30%rh ± 5%
30...70%rh ± 3%
70...90%rh ± 5%
90...95%rh ±10%
τ
Response time
0.5
=20s
Control systems Temperature Humidity
Pt 1000 20kΩΩΩΩ NTC BALCO 500 0...1Vdc 0...10Vdc
Excel Classic X X X X
Excel Plus X X X X
High Performance Excel Plus X X X X
Excel EMC X X X X
Excel 500/600 (XF521) X X X
Excel 500/600 (XF526) X X X X
Excel 20 & 50 X X
Excel 80B & 100B X X X
Excel IRC Multicontroller
R7451A1030
MicroniK 100 X X
MicroniK 100 “NEW“
R7420B1036/R7420F1045
MicroniK 200 X X X X
XXX
XX
EN0C-0604 0796R2-MA 2
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DIMENSIONS
H7012A,B ROOM HUMIDITY / TEMPERATURE SENSOR
80 (3.15)
Honeywell
Honeywell
HoneywellHoneywell
130
(5.12)
Dimensions in mm and (in ch)
20
(0.79)
(1.34)
34
Fig. 1 Dimensions
11
(0.43)
5 mounting holes 4mm (0.16) dia.
for 3 (2) screws 3.5mm (0 .14) dia.
mounted in positions 1 (preferred) or 2.
1
2
1,2
2
1
60 (2.36)
30
(1.18)
60
(2.36)
107
(4.21)
INSTALLATION
230Vac
Transformer f or
sensors and actuators
24Vac
Sensor
1
27
0...1V/
0...10V
5 / 6
Common
Fig. 2 Installation Example
Controller
rh Input
Common
24Vac 230Vac
Transformer f or
controller
3 EN0C-0610 0398R3-MA
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H7012A,B ROOM HUMIDITY / TEMPERATURE SENSOR
Mounting and Installation Advice:
•= Mount these units at the inside wall of the room to be
heated or air conditioned, away from doors, windows
and heat sources.
•= Do not mount in niches, book shelves, behind cabinets
or curtains or where it could be exposed to solar
radiation.
•= Seal the conduit opening to avoid false measurement
due to draught from the conduit.
•= Provide sufficient air circulation.
Offset due to wire resistance per 10m distance from sensor
to controller:
Type of wire Temperature offset
Pt 1000 BALCO 500 NTC
2
0.5mm
(AWG20)
1.0mm
(AWG17)
1.5mm
(AWG15)
0.18°C (0.324°F) 0.3°C (0.54°F)
2
0.09°C (0.162°F) 0.15°C (0.27°F) negligible
2
0.06°C (0.108°F) 0.1°C (0.1°F)
Wiring connection
NOTE
CAUTION
Use shielded wiring in areas with high EMI.
Keep 15cm (5.9’’) minimum distance between
sensor lines and 230Vac power lines.
Use two transformers: one for sensors and
actuators and one for the controller (see Fig. 3).
Wiring run Maximum length
Sensor to controller 200m (660ft)
24V
1
24V
2
3
4
5
6
7
Pt 1000/NTC/
BALCO 500
0...1V
0...10V
COM = 24V
8
9
10
Home and Building Control Products
Honeywell AG
Böblinger Straβe 17
D-71101 Schönaich
Phone: (49) 7031 63701
Fax: (49) 7031 637493
http://europe.hbc.honeywell.com
POWER SUPPLY
TEMPERATURE SENSOR
REL. HUMIDITY SENSOR
1 2 3 4 5 6 7 8 9 10
Fig. 3 Installation
Subject to change without notice. Printed in Germany Manufacturing location certi fied to
EN0C-0610 0398R3-MA
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