Item No. 1102-1011-2102-030
EAN 4 251325 618784

Electronic frost protection thermostat/ frost monitor THERMASREG® FS-20 with fully active copper sensor rod, switching relay output, continuous temperature and valve output (summation output 0 -10 V), and control and cascading input (0 -10 V). The frost sensor is used for monitoring air conditioning systems, heat exchangers, heating registers and similar equipment preventing frost damage and freezing up. The sensor can detect when the temperature falls below the limit value at the coldest measuring point of the capillary tube. In case of capillary breakage, power failure, or electrical damage at the device, the frost protection monitor's relay automatically switches to frost. Mounting clamps MK-05-K are included in the delivery.

253,68 € net
Voltage supply 24 V AC/ DC (± 10 %)
Load resistance RL > 50 kOhm
Switch-on ⁄ start-up time < 1 min
Response time t90 < 5 s
Output 1 x 0 -10 V output temperature (corresponding to 0...+15 °C)
1 x 0 -10 V output valve
(frost signal with control voltage and cascading)
1 x potential-free changeover contact (24 V),
range of adjustment 0...+15 °C
Measuring range 0...+15 °C
Accuracy typically ± 1 K (at +10 °C)
Ambient temperatures Sensor and capillary tube: –20...+60 °C
(capillary tube at a distance of > 20 cm from the housing)
Housing: –15...+50 °C
Storage/ transport: –30...+70 °C
Process connection by mounting clamps MK- 05 - K
(included in the scope of delivery)
Electrical connection 0.14 - 1.5 mm² via terminal screws
Housing plastic, UV-stabilised,
material polyamide, 30 % glass-globe reinforced,
with quick-locking screws
(slotted/ Phillips head - combination),
colour traffic white (similar to RAL 9016),
housing cover for display is transparent !
Housing dimensions 126 x 90 x 50 mm (Tyr 2)
Cable gland M 16 x 1.5, including strain relief, exchangeable,
max. inner diameter 10.4 mm
Sensor and capillary copper, active over the entire sensor length, min. 25 cm
Hysteresis of switching step 2K
Permissible air humidity < 95 % r. H., non-precipitating air
Protection class III (according to EN 60 730)
Protection type IP 65 (according to EN 60 529)
Standards CE conformity,
electromagnetic compatibility according to EN 61326,
according to EMC Directive 2014/ 30/ EU
Features display with illumination, three-line, cutout approx. 70 x 40 mm
(W x H), for displaying the actual temperature, measuring
range overrange/underrange of the set switch point (frost
protection temperature), and alarm indicator for "frost" or
"error" (capillary breakage, overvoltage/undervoltage)
Type Item No. Price
KRD-04 Capillary tube gland bracket Capillary tube gland bracket for FST and MWTF/MWTM for installation in ducts / sheet metal walls 7100-0030-7000-000 7,52 €
MK-05-K Mounting brackets, plastic Plastic mounting brackets 7100-0034-1000-000 8,33 €
WS-03 Weather and sun protection Weather and sun protection 7100-0040-6000-000 37,74 €