PID-AH Photo Ionisation Detector - PID-AH

Target gases VOCs with ionisation potentials < 10.6 eV
Minimum detection level ppb isobutylene 1
Linear range ppm isobutylene 3% deviation 50
Overrange ppm isobutylene 50
Sensitivity linear range mV / ppm Isobutylene > 20
Full stabilisation time minutes to 20 ppb 20
Warm up time seconds time to full operation 5
Offset voltage mV variable between detectors 46 to 60
Response time (t90) seconds diffusion mode < 3

  • Model Number: PID-AH
  • Data Sheet: Date Sheet File
Quantity:
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  • PID-AH Photo Ionisation Detector
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Product Specification

Figure 1 PID-AH Schematic Diagram


1. Do not obstruct Ø3.5 sensing area
2. Seal between Ø6.2 and Ø9.0 (if different to atmosphere)
3. Pin out details:
Pin 1: + V supply (See note 5)
Pin 2: Signal output
Pin 3: 0V supply
4. All dimensions ±0.1mm unless otherwise stated

5. Input voltage selector hole:
a) When filled with solder the onboard regulator is disabled.
A regulated supply of 3.0 - 3.6V (typically 3.3V) is then required.
b) When not filled with solder the onboard regulator is enabled.
A regulated or unregulated supply between 3.6 - 10 V is then required
for IS applications, or up to 18 V for non-IS applications.
Nomally shipped with regulator enabled


PERFORMANCE
Target gases                    VOCs with ionisation potentials                     < 10.6 eV
Minimum detection level  ppb isobutylene                                                         1
Linear range                    ppm isobutylene           3% deviation                      50
Overrange                       ppm isobutylene                                                      50
Sensitivity                        linear range                  mV / ppm Isobutylene      > 20
Full stabilisation time       minutes to 20 ppb                                                   20
Warm up time                 seconds                        time to full operation            5
Offset voltage                  mV variable between detectors                       46 to 60
Response time (t90 )       seconds                      diffusion mode                    < 3

ELECTRICAL
Power consumption      85 mW (max) at 3.2 V, 300 mW transient for 200 msec on switch-on
Supply voltage             3.2 to 3.6 VDC Ideally regulated ±0.01V (onboard regulator disabled)
                                    3.2 to 10 VDC (onboard regulator enabled)
                                    (maximum 10V for IS approval, maximum 18 V for non-IS)
Output signal               Offset voltage (minimum 46 mV) to Vmax
                                   (Vmax = Vsupply -0.1 V when regulator is enabled)

ENVIRONMENTAL
Temperature range            -40℃ to +55℃ (Intrinsically Safe); -40℃ to +65℃ (non-IS)
Temperature dependence   0℃ to 40℃         90% to 100% of signal at 20℃
                                          -20℃                  140% of signal at 20℃
Relative humidity range     Non-condensing   0 to 95%
Humidity sensitivity           During operations: 0% to 75% rh transient   near zero

KEY SPECIFICATIONS
Operating life            5 years (excluding replaceable lamp and electrode stack)
IS Approval              IECEx Ex ia IIC T4; ATEX Ex ia II 1G -40℃ < Ta < +55℃ (< 10VDC supply)
Onboard filter           To remove liquids and particulates
Lamp                       User replaceable
Electrode stack         User replaceable
Error state signal      Lamp out: 35 mV
Weight                    < 8g
Position sensitivity   None
Warranty period      Electronics and housing: 24 months
                               Lamp and electrode stack are user replaceable. 10.6eV lamp: 5,000 lit hours

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