10
G
FSTM ⁄ FSTM-P | FSFM ⁄ FSFTM | FSCO
2
⁄ FSTM-CO
2
Rev. 2020 - V11
The room sensor
THERMASGARD
®
FSTM ⁄ FSTM - P
in the in-wall enclosure, optionally with potentiometer,
is used for measuring the room temperature, and for setpoint adjustment.
The room sensor
HYGRASGARD
®
FSFM ⁄ FSFTM
in the in-wall enclosure
is used for measuring the relative humidity and temperature of the air.
The room sensor
AERASGARD
®
FSCO
2
⁄ FSTM - CO
2
in the in-wall enclosure
is used for measuring the CO
2
content and temperature of the air.
A digital, long-term stable sensor is used for humidity and temperature measurement. Relative humidity [% r. H.] is the quotient of water vapour
partial pressure divided by the saturation vapour pressure at the respective gas temperature. The CO
2
content of the air is measured using an
optical NDIR sensor (non-dispersive infra-red technology). The measuring transducer converts the measured values into a standard signal of 0 - 10 V.
The in-wall sensor is mounted in high-quality panel switch programmes, ideally of the brands Gira, Berker, Merten, Jung, Siemens or Busch-Jaeger
(using in-wall adapters, no setpoint adjustment possible) either individually or in combination with light switches, socket outlets, etc. It is used in
non-aggressive, dust-free environments, in refrigeration, air conditioning and clean room technology, and in interior rooms, such as living rooms,
offices, hotels, etc.
TECHNICAL DATA
Power supply:
24 V AC ⁄ DC (± 10 %)
Power consumption:
< 1.1 W ⁄ 24 V DC ; < 2.2 VA ⁄ 24 V AC
(FSTM ⁄ FSTM-P ⁄ FSFM ⁄ FSFTM)
< 1.5 W ⁄ 24 V DC ; < 2.9 VA ⁄ 24 V AC
(FSCO
2
⁄ FSTM-CO
2
)
HUMIDITY
Sensor:
digital humidity sensor with integrated temperature sensor,
low hysteresis, high long-term stability
Long-term stability:
± 1 % per year
Measuring range, humidity::
0...100 % r. H.
Operating range, humidity:
0...95 % r. H. (non-precipitating air)
Deviation, humidity:
typically ± 3.0 % (20...80 % r. H.) at +25 °C, otherwise ± 5.0 %
Output, humidity:
0 - 10 V
TEMPERATURE
Measuring range:
0...+50 °C
Deviation, temperature:
typically ± 0.8 K at +25 °C
Output, temperature:
0 - 10 V
Output, potentiometer:
0 - 10 V (
FSTM-P
with setpoint adjustment, not possible with Busch-Jaeger)
CARBON DIOXIDE (CO
2
)
Sensor, CO
2
:
optical NDIR sensor
(non-dispersive infra-red technology),
with manual calibration (via zero button) and automatic calibration (fixed)
Long-term stability:
< 2 % in 15 years
Measuring range, CO
2
:
0...2000 ppm
Output, CO
2
:
0 - 10 V
Measuring accuracy, CO
2
:
typically ± 30 ppm ± 3 % of measured value
Temperature dependence, CO
2
:
± 5 ppm ⁄ °C or ± 0.5 % of measured value ⁄ °C (whichever is higher)
Pressure dependence:
± 0.13 % ⁄ mm Hg
Gas exchange:
by diffusion
Warm up time:
approx. 1 hour
Response time:
< 2 minutes
Mounting:
in-wall flush box Ø 55 mm
Electrical connection:
0.14 - 1.5 mm², via screw terminals
Ambient temperature:
Storage –35...+85 °C; Operation 0...+50 °C
Permitted humidity:
max. 90 % r.H., non-precipitating air
Medium:
clean air and other non-aggressive, non-combustible gases
Protection class:
III (according to EN 60 730)
Protection type:
IP 20 (according to 60 529)
Standards:
CE-conformity, electromagnetic compatibility according to EN 61 326, EMC Directive 2014 ⁄ 30 ⁄ EU
SWITCH PROGR AMME
Manufacturer:
GIRA System 55
(other switch programmes, manufacturers, colours as well as prices available upon request)
Housing:
plastic, the standard colour is pure glossy white (similar to RAL 9010)
(other colours are available upon request with colour variants depending on the respective light switch programme)
