PID-A10 pages

PID-A1 Photo Ionisation Detector

Technical Specification

Figure 1 PID-A1 Schematic Diagram

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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

100
300
6,000
> 0.6
20
5
52 to 57
<3

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

0 to 95%
near zero

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