SENSITRON
A Halma Company
MT4731
SMART3-R
Manual (EN)
P. 17/26
Tabelw 1
Technical characteristics of SMART3-R
Application
Machinery rooms, laboratories and non-classified areas
Sensing element
Catalytic, Infrared and Electrochemical cell
Predicted life of the sensing element
Catalytic: 4/5 years
Electrochemical cell: 2/3 years
Infrared: >5 years
Warmup time
1 minute
Fullscale
Flammable gas: 100% LFL
Toxic gas: depending on the detected gas
Ripetibility
5% FS
Power supply
12-24 Vdc (-20% +15%) as standard
90-240 Vac optional
Signal output
3 relays; serial output RS485; analogue output 4-20 mA (not for 230 Vac version)
Power consumption
60 mA at 24 Vdc with electrochemical cell
73 mA at 24 Vdc with catalytic sensor
110 mA at 24 Vdc with infrared sensor
Relays contact rating
1.0 A at 30 Vdc
Optical indications
4 smart LED
Acoustic indications
Buzzer 63 dB 1m
External case material
Polycarbonate
External case dimensions
Box: 120 x 120 x 52 mm
Cover: 130 x 130 x 22 mm
Plastic box for remote head: 106 x 106 x 56 mm
Maximum length for remote head: 5 m
Weigth
450 g
Cable entries
2 entries with M20 cable glands
6 optional entries for M16 cable glands
IP Grade
IP42
Storage temperature
Catalytic and infrared sensor: -40 / +85°C
Electrochemical cell: 0 / +20°C up to 6 months
Operating temperature
Catalytic sensor: -40 / +60°C
Infrared sensor for flammable gas: -40 / +60°C
Infrared sensor for refrigerant gas: -10 / +50°C
Electrochemical cell: -30 / +50°C
The 220Vac version has a maximum ambient temperature T=50°C
Operating humidity
Catalytic and infrared sensor: 0 / 95% RH non condensing
Electrochemical cell: 15 / 90% RH non condensing
2. Technical
characteristics
