Bacharach R514A and R452B refrigerant gas detector

Bacharach has announced the addition of two new gas options, R514A and R452B, for its MGS-250 infrared refrigerant gas detector product family.

This non-dispersive infrared sensor technology offers user benefits when detecting either of these two gases. It eliminates cross-interference from other gases and from changes in temperature and humidity, providing the user with peace of mind knowing the reading is accurate and stable. Other benefits include added sensor life of 5–7 years and reduced maintenance.

Modbus RTU protocols, analog and relay outputs enable easy integration with building management systems and industrial automation system controls for refrigeration systems operating with R514A or R452B.

R514A is a refrigerant with a GWP of under 2, and is targeted as a replacement for R123 in centrifugal chiller applications. It is a blend of HFO 1336 mzz(Z) (74.7%) with trans-1,2-dichloroethene (25.3%), a gas not previously used in refrigerants.

ASHRAE 34 classes R514A as a B1 refrigerant, meaning that it is not flammable, but is classed as having higher toxicity, with an OEL of 323 ppm. This highlights the importance of refrigerant monitoring in this application, maintaining high accuracy and enabling the effective and reliable detection of refrigerant leaks which could be harmful, as well as reducing the efficiency of the refrigeration system.

R452B is designed as a lower GWP replacement for R410A in air-conditioning applications, with a GWP of 676, which is around 65% less than that of R410A. It is an HFO/HFC blend of R32 (67%), R1234yf (26%) and R125 (7%).

ASHRAE 34 classes R452B as an A2L refrigerant, meaning it is classed as non-toxic but is mildly flammable. Reliable and accurate monitoring of A2L-classified refrigerants is an important factor in complying with regulations and assisting the safe use of refrigerants.