Drager Polytron IR is obsolete; the equivalents are PIR 7000, Polytron 5700 and Polytron 8700.

The Polytron IR was a permanent gas detector for monitoring combustible gases using an Infrared sensor. Two choices were available: type 340, which opened the door to new applications picking up alkanes and cyclohexane. Configurable from 5 to 100 %LEL. Or secondly, type 334 measuring 0 to 20 %LEL and up to 100 %LEL, alternatively 0 to 100 %v/v for methane. The IR sensor had a longer life span and was robust, allowing use in harsh conditions such as offshore. Little maintenance was required, and drift-free was less than 2% LEL.

The detector sent a 2 mA signal to the controller in the event of dirty optics, allowing preventive measures and continued readings before a block beam signal at less than 1mA was generated. Normal output signal 4-20mA. HART and RS485 digital outputs were provided.

Those currently in operation are permitted for use in hazardous areas and have the following approvals UL, CSA Class 1, Div 1, Groups B, C, D, and ATEX.

• Transmitter housing SS316 stainless steel.

Polytron IR Part Numbers

• UL Type 334 6810098
• CEN Type 334 6810100
• CEN Type 334 complete set 8315629
• UL Type 340 6810820
• CEN Type 340 6810760
• CEN Type 340 complete set