Type 705 High Temperature Combustible Gas Sensor Quick Start Guide
●The 705 High Temperature (HT) Combustible Gas Sensor is a gas detector that is UL certified for Class I, Division 1, Groups B, C and D for installation in a hazardous area.
●It employs a catalytic pellistor sensor device which is used as part of a bridge measuring circuit. The sensor must be mounted on a suitably UL approved high temperature junctionbox in the hazardous area and connected to control equipment situated in a non-hazardous area to form part of a combustible-gas detection system.
●The sensor comprises an aluminium housing containing a pair of poison resistant detector elements, with a sintered stainless steel disc forming the face of the sensor. The sensor contains two elements which are heated by a supply derived from the associated control equipment. One element is sensitive to the presence of combustible gas, the element temperature increasing in response to catalytic oxidation of the gas. The resultant rise in resistance of the sensitive element, proportional to gas concentration, is processed by the associated control module.
●The non-sensitive element compensates for effects of changes in ambient temperature. The sensor drive current is set to a value appropriate to the type of elements used.
●The housing has a 51mm or 47.2mm AF body with a 3/4 NPT mounting thread at one end and an M36 accessory thread on the other end. The following accessories are available for use with the sensor (also see Accessories & Spare Parts):
▲Collecting Cone
▲Weather Protection Housing
▲Sample Flow Housing
▲Hydrophobic Barrier
▲Gassing Point Assembly
●When delivered a disposable plastic Filter Housing with protective disc for the sinter is fitted to the M36 accessory thread.
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High Temperature Combustible Gas Sensor 、 gas detector 、 HT sensor |
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User's Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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09/2013 |
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Issue 2 |
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00705M5010_ECO A04169 |
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580 KB |
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