BW GasAlert Extreme Single Gas Detectors, Nitric oxide (NO) with  0-250 ppm ppm. 

Designed with durability and comfort in mind, this gas detector monitors for any single gas hazard within its wide range of available toxic gas models. Equipped with internal vibrating alarm for high noise areas. Secure and accurate history with datalogging option. Multi-language support in English, French, German, Spanish, and Portuguese. With easy on/off operation, this single gas detector offers extended longevity with a two year field-replaceable battery and sensor.

Pepperl+Fuchs Frequency Converter with Trip Values KFD2-UFC-Ex1.D

1-channel isolated barrier

24 V DC supply (Power Rail)

Input for NAMUR sensors or dry contacts

Input frequency 1 mHz ... 5 kHz

Current output 0/4 mA ... 20 mA

Relay contact and transistor output

Start-up override

Line fault detection (LFD)

Up to SIL 2 acc. to IEC 61508/IEC 61511

MTL4544S Repeater Power Supply 2-channel, 4/20mA, HART®, 2- or 3- wire transmitters.

The MTL4544 provides fully-floating dc supplies for energising two conventional 2-wire or 3-wire 4/20mA or HART transmitters located in a hazardous area, and repeats the current in other circuits to drive two safe-area loads. For smart transmitters, the unit allows bi-directional transmission of digital communication signals superimposed on the 4/20mA loop current. Alternatively, the MTL4544S acts as a current sink for a safe-area connection rather than driving a current into the load. Separately powered current sources, such as 4-wire transmitters, can be connected but will not support HART communication.

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