Flow Housing - Honeywell Apex Technical Handbook

MAN0604_Issue 09_02-2013
2110M8030

2.3.3 Flow Housing

Part Number: 2110B2140
The Flow Housing accessory provides a means of applying gas to the sensor for calibration and test
(for details see section 4.7). It can also be used in sampling systems where a sample of gas is drawn
through a tube to the sensor. Conforms to CSA C22.2 No. 152 when fitted to the Certified Sensor
with specific cartridges installed. See specifications for details.
It provides:
• Two ports 8mm I/D to take 6mm tubing.
• A seal to stop gas dilution.
The housing works irrespective of which pipe the gas is applied to and flows gas across the face of
the sensor rather than onto its face.
The difference in reading between a calibration made with the Flow Housing accessory and one
made under diffusion conditions (in a tank of still gas) is less than 30%. The Flow Housing is suitable
for flow rates in the range of 0.7 - 1 litre per minute flow across the cell.
A hydrophobic filter is supplied with the housing which must be used when calibrating sensors fitted
with flammable gas cartridges.
When calibrating sensors fitted with other types of cartridge then the filter mounted in the sensor cap
for normal gas sensing operation (if fitted) must be removed and used in the Flow Housing.
The Flow Housing accessory is attached to the sensor by means of a bayonet fitting.
2. OvERviEW
17
43mm
53mm
Apex