R-515B Leak Detectors
R-1234ze(E)/…R-515B (Solstice® N15) is a non-flammable, low-GWP refrigerant developed as a long-term replacement for R-134A in chillers, heat pumps, air conditioning systems, and medium-temperature commercial refrigeration applications. It delivers performance similar to R-134A while reducing GWP by approximately 77-80%.
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Key Information
Essential safety and exposure information for R-515B
Health Effects
- ASHRAE safety classification A1 (lower toxicity
- non-flammable). High vapor concentrations may displace oxygen and create an asphyxiation hazard in poorly ventilated areas.
Common Sources
- Centrifugal chillers
- Screw chillers
- Heat pumps
- HVAC systems
- Medium-temperature commercial refrigeration systems
- High-ambient air conditioning systems
Exposure Limits
- WEEL
- 1,000 ppm (8-hour TWA) commonly applied to the primary HFO component (R-1234ze(E))
- No specific OSHA PEL established
- No specific OSHA PEL established
- No specific NIOSH REL established
- No specific NIOSH REL established
Regulatory Status
- EPA SNAP
- Acceptable replacement for R-134a applications
- ASHRAE 34
- A1 Safety Classification
- GWP (AR4)
- 292-293
- ODP
- 0
- DOT
- Class 2.2 Non-Flammable Gas, UN3163
- F-Gas Status
- Low-GWP refrigerant designed to support regulatory compliance
Detection Requirements
- Sensor Technology
- Infrared (NDIR)
- Detection Range
- 0-2,000 ppm
- Response Time
- <60 seconds (T90)
- Cross-Sensitivity
- Test for blend-specific response
- Calibration
- Annual with target gas recommended
Related Applications
Industries and environments where R-515B detection is critical
Chiller Rooms
Ammonia, R-410A, and A2L refrigerant detection for central plant mechanical rooms and HVAC equipment areas
Data Centers
Refrigerant leaks from cooling infrastructure can create asphyxiation risks, while hydrogen off‑gassing from battery systems can form an explosive hazard.
Detection Solutions
Sensors and detectors for R-515B monitoring
cGas-SC Self-Contained Controller
A self contained controller with up to 3 gas channels, Plug & Play Smart Sensor Technology and configurable logic control and priority settings. Offers superior user customization and reliable gas detection performance for monitoring many gases.
cGas Detector IR Refrigerant Transmitter
Non-dispersive infrared refrigerant gas detector with accurate, low level leak detection, available with analog output or BACnet® or Modbus® output and Plug & Play Smart Sensor Technology.
FCS Multi Channel System Controllers
High performance controller with logic and priority settings for monitoring toxic, combustible and refrigerant gases with versatile control functionality. Available with Modbus® or BACnet® communication with BAS, supports 4-20 mA and Modbus® driven VFDs.