Base Unit

• Allows active sampling through a Teflon tube employing a vacuum pump
• Provides water ingress protection
• Allows remote sampling from inaccessible areas (eg. Controlled Atmosphere environments)
• Improved performance in pressure and flow fluctuating environments

Typical application

Short distance remote monitoring for:-

•  Low Oxygen environments (3-5% O 2 )
•  Indoor air quality – duct sampling
•  Filtered air sampling

Power (user supplied)

24VDC, 500mA (range 22-26 VDC)

Analogue output

4-20 mA (opto-isolated), 12-24 V

External signal type

Transistor Output

External signals

4

External signal functions

Low Alarm, High Alarm, Control & Diagnostics

Inputs

Standby toggle

Communication

RS485

Jumpers

J1, J2, J3 termination resistors

Connectors

Screw

ID

1 (Default)
User configurable from 1 - 255

Alarm set points (2)

User configurable

Control set point

User configurable

RS485 protocol

Aeroqual proprietary product

Removable / replaceable sensor head

Yes

Sampling Pump

12VDC, long life, brushless, diaphram pump

Enclosure rating

IP41 & NEMA 2 equivalent

Enclosure size

230W x 140H x 95D (mm); 9”W x 5½”H x 3¾”D (in)

Enclosure casing

Fibre reinforced polycarbonate

Weight

< 1100 g; < 1 lb 3 oz

Approvals

Part 15 of the FCC Rules

EN 50082-1: 1997
EN 50081-1: 1992

Temperature and Humidity Sensors

(for Series 945 only)

Accuracy

Resolution

Range

Temperature

± 0.3 [K] @ 25°C

0.04 min resolution

range -40°C to 124°C

Humidity

±1.8% RH

0.4 min resolution

range 0 – 100%

Sensor Heads

Low

High

Leak

Measurement range

0.000 - 0.500 ppm

0.50 - 20.00 ppm

0.00 - 50.00 ppm

Accuracy

< 0.008 ppm (0 - 0.100 ppm)

± 10% (0.100 – 0.500 ppm)

± 10% (0.20 - 2.00 ppm)

± 15% (2.00 - 20.00 ppm)

± 20%,

15 seconds after Reset

Resolution

0.001 ppm

0.01 ppm

0.01 ppm

Controlled Atmosphere Version

Available on Request

Available on Request

Available on Request

T90 Response

< 60 seconds (T90)

< 35 seconds (T90)

< 10 seconds

Sensor type

Gas-sensitive semiconductor

Operating temperature range

-5°C to 50°C; 23°F to 122°F (sensor head and base unit)

Relative humidity limit

95% maximum (sensor head and base unit)

Measurement range

0 to 400 ppm toluene

Accuracy

< +/- 10 ppm (0 – 200 ppm)

< +/- 10% ( > 200 ppm)

T90 response

< 60 s

Sensor type

Gas-sensitive semiconductor

Operating temperature range

-20°C to 60°C

Operating relative humidity range

5 to 95% non-condensating

Measurement range

0 to 1000 ppm

Accuracy

< +/- 5 ppm (0 – 100 ppm) < +/- 10% (100 – 1000 ppm)

T90 response

< 60 s

Sensor type

Gas-sensitive semiconductor

Operating temperature range

-20°C to 60°C;

Operating relative humidity range

5 to 95% non-condensating

Measurement range

0 to 2000 ppm carbon monoxide

Accuracy

< +/- 10 ppm in the range 0 to 400 ppm

T90 response

< 150s

Sensor type

Gas-sensitive semiconductor

Operating temperature range

0°C to 70°C;

Operating relative humidity range

5 to 95% non-condensating

Approvals

UL 2034, BS 7860