PID-AH2 Tvoc Detector Sensor Photo Ionisation Sensor Photo Sensor

PID-AH2 Photo Ionisation Detector

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        -40ºC to +55ºC (Intrinsically Safe); -40ºC to +65ºC (non-IS)

Temperature dependence   0°C to 40°C    90% to 100% of signal at 20°C

                         -20°C           140% of signal at 20°C

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 -40ºC < Ta < +55ºC (< 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