SENSITRON
A Halma Company
MTEX4899
SMART S-MS MED
Manuale (IT)
P. 22/36
Table 1
Technical specifications of SMART S-MS MED gas detectors
Sensing element
Pellistor (Catalytic sensor) or Infrared sensor
Measurement range
0-100% LFL (Source of LFL values: EN 60079-20-1:2010)
Predicted sensor lifetime
4/5 years
Power supply
12- 24 Vdc - 20% + 15%
Maximum power
<5,4 W (see instrument label)
Control unit
Microprocessor 32 bit
Watch-dog
Internal and external for the microprocessor status control
Visual indications
Flickering LED on the base board
Max load resistance
200
Ω
on the 4-20mA output line
Signal output
RS485 for MU+ MED; analogue 4-20 output
Relay outputs
3 relays with tension free changeover contact 24V-1 A
Auto zeroing routine
Zero drift compensation
Digital filter
variable average on the sampled values
Repeatability
from ±2% to ±5% FS (depending on sensor type)
Accuracy
from ±2% to ±5% FS (depending on sensor type)
Warm-up time
120 s
Stabilization time
60 minutes
Response time (t90)
< 60 s
Storage conditions:
Temperature
Humidity
Pressure
Time
-40 / + 85 °C (or limits of the sensor)
See operating conditions
See operating conditions
1 year
Operating conditions:
Temperature
Humidity
Pressure
Air velocity
See instrument label
20-90 % Rh / 40° C (5-95% RH non condensing, on request)
80-120 kPa with catalytic sensor
86-120 kPa with infrared sensor
< 6 m/s
Cable entrance
2 x ¾” NPT
Weight
1500 g
Dimension
187 x 145 x 108 mm
Positioning
The sensor head must be mounted downward
EMC Reference standard
EN50270:2015
1.3
TECHNICAL SPECIFICATIONS
