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