Thermocouples and RTD Sensors are an Ignition Source
RTD and Thermocouple sensors are considered to be simple apparatus and when fitted with appropriate barriers may be installed freely in IS Circuits, ( Ex ia ) no further certification is necessary.
However the RTD and Thermocouple Sensors must meet the requirements of; AS/NZS 60079.11: 2006 Explosive Atmospheres Part 11 Equipment Protection by intrinsic afety ’i ’ Section 6.3.12 Dielectric strength requirement “ 500 VAC RMS Test Voltage of Insulation Resistance between Conductors or Conductors and Sheath for 2 minutes “
Thermocouples ( insulated junctions only ) and RTD Sensors manufactured will be bjected to the following tests,
- Visual and Dimensional Inspection
- Insulation Resistance Minimum 1000 M Ohms
- 6.0 mm dia Probe and above 1000 V DC
- 3.0 mm and 4.5 mm dia Probe 500 V DC
- 1.5 mm dia Probe 250 V DC
- Upscale Polarity Test
- Electrical Continuity Test
Certificate of Test 1047 will be supplied, there are a number of variations depending upon equipment supplied.
There are a number of sales drawings available and have a Ex ia Suffix added to the relevant SD number.
All thermocouples and RTD sensors in the price list meeting the requirements can be offered. The sensor will have a label attached .
Transmitters
To compliment these we have available the TCA range of IECEx Approved and matching IECEx Approved Transformer Isolated Barrier.
| Part No TCHMTEXI |
Transmitter Head Mounted 2 Wire Hart Protocol Ex ia (IECEx Approved) |
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Multi Input Thermocouple and RTD
4—20 or 20—4 mA output
Upscale or Downscale Burnout
11.5 to 30 V Power Supply
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Data Sheet SD 1492
IECEx Certificate SD 1493 |
Price $375.00 ea
 |
| Part No TCISB22IN |
Intrinsically Safe Barrier to suit TCHMTEXI Transmitter (IECEx Approved) |
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Part No TCISB22IN Intrinsically Safe Barrier to suit TCHMTEXI Transmitter (IECEx Approved)
Galvanic Isolation of 4—20 mA Current circuits and powering
2 wire transmitters.
20 to 250 V AC / DC Supply |
Data Sheet SD 1495
IECEx Certificate SD 1496 |
Price $535.00 ea
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