Sensitron SMART 3H LITE

Refrigerant Leak Detection for Commercial Buildings and Hotels

Commercial buildings and hotels increasingly rely on heat pump and air conditioning systems using A2L refrigerants such as R32 and R1234YF - mildly flammable gases that require fixed leak detection in mechanical plant rooms and other enclosed spaces under EU F-Gas Regulation. The SMART 3H LITE is designed precisely for this application: a straightforward infrared detector covering A1 and A2L refrigerant gases and CO₂, with RS485 and relay outputs for integration with building management systems.

For facility managers, building engineers, and HVAC contractors specifying leak detection for commercial or hospitality properties, the SMART 3H LITE provides a clearly scoped, F-Gas compliant solution without unnecessary complexity. BIM files are available, supporting integration into building documentation workflows from design stage through to commissioning and handover.

SMART 3H LITE vs SMART 3 Blizzard - Choosing the Right Refrigerant Detector

Both the SMART 3H LITE and the SMART 3 Blizzard are infrared refrigerant detectors for non-classified areas from the SMART 3 series. The distinction comes down to feature set and application focus:

SMART 3H LITE - designed for building and hotel applications. RS485 and relay outputs only — no 4–20 mA output. Two relay outputs. No data logger. Simple, cost-effective specification for BMS-integrated commercial building installations.

SMART 3 Blizzard - designed for a broader range of applications. Wireless SENSE interface for non-intrusive calibration, alarm management, firmware updates, and report downloads via smartphone. 4–20 mA output with 2 relay outputs. SIL2 certified. Better suited to installations where wireless management, SIL certification, or 4–20 mA integration is required.

If your installation is a commercial building or hotel HVAC system integrating with a BMS via RS485, the SMART 3H LITE is likely the more appropriate and cost-effective specification. For installations requiring SIL2 certification or wireless management capability, the SMART 3 Blizzard is the correct choice.

Contact us for product selection advice

Have a question about the Sensitron SMART 3H LITE?

Our technical team can advise on refrigerant gas compatibility, BMS integration, F-Gas Regulation requirements, and whether the SMART 3H LITE or another model in the SMART 3 series is the right specification for your installation.