ASU-1

Advantages and features of the Sensor Aspirator Unit

• Reduces installation and maintenance costs

• Reduces engineering time required on site minimising disruption

and downtime under target areas

• Improved safety

• Low cost, low maintenance, long life

• No specialist safety equipment required for servicing

• Internal or remote gas sensor / transmitter

• Full fault monitoring

Specifications

PUMP/FLOW MONITOR
Input: 24v DC ±20% 70mA
Flow Rate: 1.5 litres/min
Continuous Running - Pump Motor - 6 years expected / Diaphragm - 3 years in air
Flow Fail Monitor
Green LED – normal operation
Red LED – pipe blockage (FF)
Orange LED – pump fail (PF)
Sounder – not less than 85dB @ 30cm
Outputs - Relay S.P.C.O 1Amp @ 230vAC – PF/FF/PF+FF / Selectable 5/12vDC NE or DE / Factory set – open drain
Sample Line
6mm OD 4mm ID
Max Length - 25m, min - 1m
Material - nylon, polypropylene, PTFE
Couplings - In/Out - push fit - barbed

ENCLOSURE
Type - 30J Safe area use only
Ingress Protection - IP65
Material - ABS Flame Retardent FR40 / Lid Screws M4SS
Finish - Signal White RAL 9003
Weight - 400gms

ENTRIES
Rear 5-20mm knock outs
Bottom 2-20mm knock outs
Top, sides - not specified

FIXING
Standoffs - M4 or No 8 screws
Drill at (C) when standoffs removed
Conduit Box - drill at (A) 4.5mm
Surface Mount Box - drill at (B) 4.5mm

EU Design No. - 01359723-0001

SENSOR/TRANSMITTER
To accommodate on board sensor/transmitter and larger pumps a deep box is required - see ASU-2 ref C1547

MOUNTING/POSITION
The unit/sensor should be mounted at chest height with the sample line travelling to the chosen target area at either maximum height for lighter than air gases or minimum low level (100mm) for heavier than air gases. A filter (Part no. 008-212) should be attached to the pipe end where high levels of particulates may be present.

 

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