The DAX 420 detector was designed to continuously measure the presence of various explosive gases in the air.
Its measurement principle, catalytic combustion, gives it its major benefits:
– very short response time,
– accuracy and reliability of measurements.
By connecting it to a Dalemans unit or to any other instrument that can receive a 4..20 mA
signal, you will benefit from a highly flexible installation.
ATEX certified, this detector is especially suitable for the industrial sector, whose applications are located in an explosive atmosphere.
| MODEL |
DAX 420 |
| SENSING HEAD |
Stainless steel 1.4404 (AISI316L) |
| SINTERED METAL FILTER |
| JUNCTION BOX |
Aluminium |
| DIMENSIONS / WEIGHT |
193 x 145 x 90 mm / 1.500 g |
| SENSOR TYPE / OUTPUT SIGNAL |
Catalytic (Pellistor) / 3-wire 4..20 mA current loop |
| ADJUSTMENTS |
Zero and calibration by internal potentiometers |
| MEASURING RANGE |
0 – 100 % LEL |
| RESOLUTION |
± 3% full scale < 60% LEL
± 3% full scale < 60% LEL
|
| RESPONSE TIME (T90) |
< 30 sec. |
| EXPECTED OPERATING LIFE SPAN |
> 2 years |
| SUPPLY VOLTAGE |
19 – 30 Vdc |
| SUPPLY CURRENT* |
Max. 90 mA |
|
| STORAGE TEMPERATURE |
-40ºC to +80ºC |
| TEMPERATURE RANGE |
-20ºC to +55ºC |
| AMBIENT HUMIDITY |
20 – 90 % HR |
| INTERMITTENT HUMIDITY |
10 – 99 % HR |
| PRESSURE |
90 – 110 kPa |
| CABLE CROSS SECTIONAL AREA |
0.75 – 2.5 mm2 (solid wires) |
| MAX. CABLE LENGTH |
1.000 m |
| LOOP RESISTOR |
50 – 750 ohms |
| INGRESS PROTECTION |
IP 6X (dust tight) |
| CABLE ENTRIES |
1 x M20 / 6.1 – 11.7 mm (other size upon request) |
| HAZARDOUS AREAS |
Zones 1 or 2 (gas) – Zones 21 or 22 (dust) |
|
