Elettrochemical Cell Detectors

This sensor is based on the micro fuel cell technology. It is substantially made of a metallic anode, an electrolyte and a cathode (fig. 1). The latter is exposed to the air through a capillary diffusion barrier. When the gas diffuses through the diffusion barrier and meets the electrolyte, a current , proportional to the gas concentration , is generated.
The electric signal has a linear diagram with a displacement error lower than 0,5% in the worst case .
This sensor is very reliable and has great performances. It has also great resistance to corrosion and it is not influenced by temperature and humidity variations. So the sensor results stable for a long period of time.
This type of sensor has great technical performances, sensitivity, stability, value repeatibility and great gas selectivity above all.

 

Advantages

 

Available Models

Explosion Proof Execution - EX-d - ATEX certified

 Gas
 Model
Nominal Range (ppm)
 Analog Output
 chlorine
 EV492CL2
0-250
 X
 carbon monoxide
 EV492CO
 0-500
 X
 ethylene oxide
 EV492ETO
 0-20
 X
 hydrogen chloride
 EV492HCL
 0-100
 X
 hydrogen cyanide
EV492HCN
 0-100
 X
 hydrogen
 EV492H2
 0-1000
  X
 hydrogen sulfide
 EV492H2S
 0-100
 X
 nitric oxide
 EV492NO
 0-250
 X
 nitric dioxide
 EV492NO2
 0-20
 X
 sulphur dioxide
 EV492SO2
 0-20
 X
 oxygen
 EV492O2
 0-30%
 X

Explosion Proof Model - Ex-d - analog and relay output

 Gas
 Model
Nominal Range (ppm)
 Analog Output
Relay Output
 chlorine
 EV493CL2
0-250
 X

 x
 carbon monoxide
 EV493CO
 0-500
 X

 x
 ethylene oxide
 EV493ETO
 0-20
 X

 x
 hydrogen chloride
 EV493HCL
 0-100
 X

 x
 hydrogen cyanide
EV493HCN
 0-100
 X

 x
 hydrogen
 EV493H2
 0-1000
  X

 x
  hydrogen sulfide
 EV493H2S
 0-100
 X

 x
 nitric oxide
 EV493NO
 0-250
 X

 x
 nitric dioxide
 EV493NO2
 0-20
 X

 x
 sulphur dioxide
 EV493SO2
 0-20
 X

 x
 oxygen
 EV493O2
 0-30%
 X

 x

TECHNICAL DATA

• power supply: 12 - 24Vcc (+/-15%)
• power: 1W max
• nominal range: see table
• analog output signal: 0 - 5V
• relay output with 2 preset thesholds
• temperature: -20 +50 °C
• humidity: 15 - 90%
• ambient pressure limit: 900 - 1100 mBar
• pressure coefficient: 0,02 (%signal/mBar)
• repeatability: 2%
• long term output drift: < 5% signal/year
• operating time delay: <120 sec.
• response time: > 20 sec
• operating life: 2 years
• explosion proof aluminium alloy box
• execution: Ex d II C T6
• IP rating: IP65
• certification: CESI EX - 96.108 X/N
• construction in accordance with standards: EN50014 - EN50018-EN50020 - EN50054 - EN50057 - CEI 64-2
• quality approval: BS5750Pt3 - ISO9002 - EN29002
• cable entry: 3/4" - UNI 6125 - ISO R7 - BS 21

 Execution IP 65 - analog and relay output

These models differ from explosion proof models for the PL suffix. Exsample: EV492NO PL is NO elettrochemical sensor with IP65 execution.

TECHNICAL DATA

• power supply: 12 - 24Vcc (+/-15%)
• power: 1W max
• nominal range: see table
• analog output signal: 0 - 5V
• relay output with 2 preset thesholds
• temperature: -20 +50 °C
• humidity: 15 - 90%
• ambient pressure limit: 900 - 1100 mBar
• pressure coefficient: 0,02 (%signal/mBar)
• repeatability: 2%
• long term output drift: < 5% signal/year
• operating time delay: <120 sec.
• response time: > 20 sec
• operating life: 2 years
• enclosure: polycarbonate plastic
• IP rating: IP65
• construction in accordance with standards: EN50054 - EN50057
• quality approval: BS5750Pt3 - ISO9002 - EN29002