
E2638-PID
Rev 10.03.2021
Specifications
10
Detected gases
VOCs with ionisation potential < 10.6 eV
Sampling method
Diffusion
Sensor type
Photoionization detector
Calibration
Isobutylene
Order code
E2608-PID-40
E2608-PID-200
Typical detection
ranges
0...40 ppm (isobutylene)
0...200 ppm (isobutylene)
Resolution / digital unit
1 ppb
1 ppm
Response time T90
< 3 s
Sensor lifetime
5 years
Calibration interval
Monthly or more frequently depending on operating conditions
Signal update
Every 1 second
Load resistance
R
L
< (Us - 2 V) / 22 mA for 4-20 mA
R
L
> 250 kOhm for 0-10 V mode
Digital interface
RS485, Modbus RTU protocol
No galvanic isolation
Power supply
11...30 VDC,
24 VAC or 90...265 VAC as options
Power consumption
< 2 VA
Analog outputs
2 × 4-20 mA / 0-10 V, user settable
Outputs assignment
OUT1 gas; OUT2 gas
NOTE! for LCD version only output 1 is available
Output scale width
> 10 × resolution
Recommended: 20-100% of the detection range
Relay outputs
2 × SPST, max 5 A, 30 VDC / 250 VAC
Alarm setpoints
Determined by the user within 5-95% of the detection range
Cable connections
Screwless spring-loaded terminals
Enclosure
Grey ABS, wall mount, protection class IP65
Dimensions
H90 × W145 × D55 mm
(overall dimensions H140 × W145 × D55 mm)