Pellistor Replacement
Infrared Hydrocarbon Gas Detector Type FGD 5/6-IR
For direct replacement of oil and gas industry pellistors
Certificate No's
IECEx KEM 06.0022U | Code Ex d IIC Ta -20 to +60 deg. C (T4)
KEMA 03ATEX2247U | Code II 2 G Ex d IIC Ta -20 to +60 deg. C (T4)
Features
- Temperature compensated Infared sensor for Hydrocarbon gases.
- Compatible with industry standard control panels.
- Eliminates all poisoning problems associated with pellistors.
- No routine maintenance required.
- Minimises operating costs.
- Weatherguard protects sensor from rain and salt spray.
- Remote gas testing facility.
- Does not utilise mirrors, lenses or separate heaters.
- Self heating sensor to protect against obscuration.
- Output signal can be set as rising or falling.
- 3.2 to 7.5 volt dc operating range.
- Constructed in grade 316 stainless steel and nylon.
- Tested and approved by major oil companies.
Description
The FGD5/6-IR Infrared Hydrocarbon Gas Detector is available in two different versions:-
- A Voltage Output, Pellistor Replacement version.
- A Current Output, 4-20mA version.
The Voltage Output, Pellistor Replacement
version of the FGD5/6-IR is a direct
replacement for existing pellistor
type gas detector heads that use a
three-wire connection to connect to
the associated control panel. Some
manufacturer’s control
units require a positive going output
signal, and some require a negative
going signal. For this reason, the
FGD5/6-IR gas detector is fitted with
an additional (blue) ‘Signal
Direction’ wire that allows the
user to select either a negative or
a positive output.
Unless otherwise requested, the FGD5/6-IR is set during manufacture to provide an output signal of 20mV per % volume methane. However, it can be configured to provide an output signal of between 15 and 30mV per % volume methane. This enables it to simulate the output from the various pellistor types currently in use.
In order for the FGD5/6-IR to simulate the wide range of pellistor types in use, the voltage output type has two different operating current versions available:-
- Type 200 version - having a nominal 200mA operational setting. This version has a typical current range from 160 to 250mA. This unit is stamped '200' on its top rim.
- Type 300 version - having a nominal 300mA operational setting. This version has a typical current range from 250 to 350mA. This unit is stamped '300' on its top rim.
In order to comply with the certification requirements, the gas detector must be installed and terminated into a suitable Ex d flameproof junction box.
Plug-in Sampling Adaptor
A plug-in sampling adaptor is available for applications where no weatherguard is fitted. This can be used in two ways:-
- Routine gas testing - where a known test gas sample is temporarily applied to the FGD5/6-IR to confirm its operation.
- Sampling systems – where the plug-in adaptor is permanently connected to the FGD5/6-IR and gas samples are drawn through sample tubes.
The adaptor plugs directly into the gas inlet in the main body of the FGD5/6-IR. The standard fitting is a push fit connector for 6mm O.D tubing. Other fittings are available upon request.
Order Codes
| Stock No. | Description |
|---|---|
| SS660-200W | FGD5/6 Infrared Pellistor Replacement 0-100% LEL (200mA Version) Complete with Weatherguard |
| SS660-300W | FGD5/6 Infrared Pellistor Replacement 0-100% LEL (300mA Version) Complete with Weatherguard |
| SS660-200A | FGD5/6 Infrared Pellistor Replacement 0-100% LEL (200mA Version) Complete with Metal Sampling Adaptor Kit |
| SS660-300A | FGD5/6 Infrared Pellistor Replacement 0-100% LEL (300mA Version) Complete with Metal Sampling Adaptor Kit |
| SS661-200W | FGD5/6 Infrared Pellistor Replacement 0-100% Volume (200mA Version) Complete with Weatherguard |
| SS661-300W | FGD5/6 Infrared Pellistor Replacement 0-100% Volume (300mA Version) Complete with Weatherguard |
| SS661-200A | FGD5/6 Infrared Pellistor Replacement 0-100% Volume (200mA Version) Complete with Metal Sampling Adaptor Kit |
| SS661-300A | FGD5/6 Infrared Pellistor Replacement 0-100% Volume (300mA Version) Complete with Metal Sampling Adaptor Kit |
| SS662 | FGD5/6 Weatherguard |
| SS663 | FGD5/6 'C' Spanner |
| SS665 | FGD5/6 Duct Mounting Kit |
| SS674 | FGD5/6 Metal Sampling Adaptor |