As the HVAC-R industry evolves toward greener, safer, and more efficient technologies, reliable refrigerant leak detection is becoming a top priority — not just for safety and regulatory compliance, but also for sustainability. The FIS5000 series by Nissha FIS Inc. is a compact, durable, and high-performance family of gas sensor modules designed to detect leaks of common refrigerants such as R32, R454B, and R290, widely used in air conditioning and refrigeration systems.

Why Use the FIS5000 modules?

✅ Mandatory Safety Compliance: In systems using A2L (mildly flammable) and A3 (flammable) class of refrigerants*, leak detection sensors are required by safety regulations.
✅ Environmental Responsibility: Fluorocarbon refrigerants are potent greenhouse gases. Early leak detection helps reduce emissions and supports sustainability efforts.
✅ Long-lasting & Easy to Install: Designed for extended use in commercial and industrial environments, the sensor is both cost-effective and user-friendly.
✅ High Sensitivity and Reliability: Ensures consistent detection performance under real-world operating conditions.
✅ Excellent value for money – ideal for cost-sensitive projects.

Standards Compliance

The sensors are compliant with major international standards for safety and performance:

• IEC60335-2-40 Edition 7.0

With a proven track record and compact form factor, the FIS5000 series is the ideal solution for OEMs, system integrators, and service professionals seeking reliable refrigerant monitoring solutions.
The FIS5062 module can easily be installed into any HVAC and refrigerating equipment. The embedded circuit contains the SB type semiconductor gas sensor. Since the module is pre-calibrated at the factory, users do not need expensive and complicated calibration equipment and procedure.
This module is designed to comply to RoHS2, JRA 4068:2016R, and IEC60335-2-40:2020 Annex LL.

The module is available in two configurations:

• FIS5062-13NC - Module without case
• FIS5062-13C1 - Module with case

(*) Refrigerants are a gas heat-transfer medium for lowering temperatures. This gas is a critical part of temperature control equipment used in air conditioners, freezers, refrigerators, and other equipment. At the same time, chlorofluorocarbon gas used as a refrigerant is known as a greenhouse gas that has a negative impact on global warming. Society demands reduced emissions of substances that impact climate change for the worse. In the 1980s, scientists began suspecting that HCFCs, then used as a main refrigerant source, contributed to destruction of the ozone layer. The Montreal Protocol, signed in 1987, called for eliminating all HCFCs by the year 2020. Today, HFCs are used as the main source of refrigerants. These chemicals have no impact on the ozone layer; however, when released into the atmosphere, they cause a greenhouse effect that impacts global warming. Beginning in 2019, HFCs have joined the list of regulated chemicals subject to mandatory emissions restrictions. The Nissha gas sensor module for refrigerant detection will play an important role in detecting refrigerant leaks, reduction emissions, and solving this important social issue.