Drager Polytron 5700 IR
Polytron 5700 is a fixed flammable gas detector equipped with an Infrared IR poison immune sensor PIR 7000. Class I, Div 1 certified, the detector is suitable for use in hazardous areas.
Common target gas measuring ranges: Methane 0 to 100 vol. % Or Propane, Ethylene, Methane with alternative ranges (see below). The PIR 7000 sensor has an integrated library of 100 gases that can be picked from the menu, cross calibration with a standard gas like Methane or Propane occurs, the procedure does not require returning the instrument or need specialist expertise. The sensor is also immune to dirt particles contaminating the optical housing, an integral four beam system counteracts the interference. A splash guard option adds further protection. Sensors are drift free and fit for the toughest of applications, for example offshore deployment.
Output from the Drager Polytron 5700 is 4-20mA 3 wire, available with relays which insures communication with all control panels.
Housing options Epoxy coated copper-free aluminum or stainless steel SS316 L. Docking stations can be included for increased safety (E), also assists commissioning. D versions without Docking station.
Operating temperature -40 to 70°C (-40 to 158°F)
A remote sensor option is available, use of calibration flow cell is required to facilitate calibration at the transmitter end.
The detector has the same advantages as other detectors in the 5000 range, a common interface, ability to act as a standalone detector, simplified menus, backlit display and selection of mounting options.
5700 has two PIR 7000 sensor choices, the 340 – has a bigger application scope with a different wavelength, offers alkanes detection at high sensitivity. Type 334 offers 0 to 20 %LEL and up to 100 %LEL, alternatively 0 to 100 %v/v for methane. For the type 340, the full scale is configurable from 5 to 100 %LEL.