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PID-A1

PID-A1
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PID-A1 Photo Ionisation Detector Technical Specification Figure 1 PID-A1 Schematic Diagram Notes: 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: 0 V supply 4. All dimensions ±0.1mm unless otherwise stated PERFORMANCE Target gases Minimum detection level Linear range Overrange Sensitivity Full stabilisation time Warm up time Offset voltage Response time (t90) US patent 7,046,012 US patent 7,821,270 EU patent 1474681 Other patents 5. Input voltage selector hole: a) When filled with solder the onboard regulator is disabled A regulated supply of 3.0 - 3.6 V (typically 3.3 V) 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 Normally shipped with regulator disabled. VOCs with ionisation potentials < 10.6 eV (ppb isobutylene) (ppm isobutylene) (5% deviation) (ppm isobutylene) (linear range) (mV / ppm Isobutylene) (minutes to 100 ppb) (seconds) time to full operation (mV) (seconds) diffusion mode ELECTRICAL Power consumption Supply voltage Output signal 110 mW (typical) at 3.3 V, 300 mW transient for 200 msec on switch-on 3.0 to 3.6 VDC Ideally regulated ±0.01V (onboard regulator disabled) 3.6 to 10 VDC (onboard regulator enabled) (maximum 10V for IS approval, maximum 18 V for non-IS) Offset voltage (minimum 50 mV) to Vmax (Vmax = Vsupply -0.1 V when regulator is enabled) ENVIRONMENTAL Temperature range Temperature dependence Relative humidity range Humidity sensitivity -40ºC to +55ºC (Intrinsically Safe); -40ºC to +65ºC (non-IS) 0°C to 40°C 90% to 100% of signal at 20°C -20°C 140% of signal at 20°C Non-condensing During operations: 0% to 75% rh transient KEY SPECIFICATIONS Operating life IS Approval Onboard filter Lamp Electrode stack Error state signal Package type Weight Position sensitivity Warranty period 5 years (excluding replaceable lamp and electrode stack) IECEx Ex ia IIC T4; ATEX Ex ia II 1G -40ºC < Ta < +55ºC (< 10VDC supply) To remove liquids and particulates User replaceable User replaceable Lamp out: 35 mV Alphasense™ CH-A3 or City Technology™ 4P < 8g None Electronics and housing: 24 months Lamp and electrode stack are user replaceable. 10.6eV lamp: 5,000 lit hours NOTE: all sensors are tested at ambient environmental conditions, unless otherwise stated. As applications of use are outside our control, the information provided is given without legal responsibility. Customers should test under their own conditions, to ensure that the sensors are suitable for their own . requirements. Alphasense Ltd, Sensor Technology House, 300 Avenue West, Skyline 120, Great Notley. CM77 7AA. UK Telephone: +44 (0) 1376 556 700 Fax: +44 (0) 1376 335 899 E-mail: sensors@alphasense.com Website: www.alphasense.com

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Perf erformance Data PID-A1 Performance Data Figure 2 Sensitivity Temperature Dependence % Output (referenced to 20oC) Figure 2 shows the temperature dependence, corrected for the gas law. This data is taken from a typical batch of PID-A1 sensors tested with 100ppm Isobutylene. The mean and ±95% confidence intervals are shown. Temperature (oC) Figure 3 Linearity to Isobutylene 3000 PID output is non-linear at higher concentrations but is repeatable and can be corrected in software. Technical Specification Non-linearity correction depends on the VOC being measured. Isobutylene (ppm) PID...

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