Description
The Honeywell S301-IRF-R123 is an infrared refrigerant gas analytics module designed for use with the 301EM-20 controller and SQN8X systems. It detects refrigerants within a 0–1000 ppm range with 1 ppm resolution and provides a 4–20 mA output for system integration. Engineered for continuous monitoring, it supports accurate leak detection in commercial and industrial mechanical rooms.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Honeywell |
| Category |
Gas Detection |
| Part Number |
S301-IRF-R123 |
| Subcategory |
Refrigerant Gas Sensors |
| Sensing Technology |
Dual Infrared (IR) |
| Measurement Range |
0–1000 ppm |
| Resolution |
1 ppm |
| Deadband |
20 ppm |
| Accuracy |
±40 ppm @ 500 ppm |
| Signal Output |
4–20 mA, 1000Ω @ 24 VDC |
| Communication |
RS-485, Modbus |
| Supply Voltage (AC) |
22–27 VAC @ 48 VA, 50/60 Hz |
| Supply Voltage (DC) |
22–38 VDC @ 2 A max |
| Response Time |
60 seconds |
| Relay Output |
(4) DPDT relays, 5A @ 30 VDC or 250 VAC (resistive) |
| Audible Alarm |
65 dBA @ 3 ft (1 m) |
| Calibration Interval |
6 Months |
| Operating Temperature |
-40°F to 104°F (-40°C to 40°C) |
| Operating Humidity |
0–95% RH (Non-Condensing) |
| Enclosure Rating |
NEMA 1 |
| Compatibility |
301EM-20, SQN8X |
| Weight |
2.0 lb |
Information About S301-IRF-R123
The S301-IRF-R123 is a Honeywell Analytics refrigerant gas sensor module utilizing dual infrared sensing technology for stable and selective detection performance. It is compatible with Honeywell 301EM-20 controllers and SQN8X platforms, communicating via 4–20 mA output and RS-485 Modbus networks. The sensor operates on 22–27 VAC at 48 VA (50/60 Hz) or 22–38 VDC at 2 A maximum and supports transmitter distances up to 500 feet depending on configuration. Designed for multi-gas refrigerant monitoring, it provides a measurement range of 0–1000 ppm with a 20 ppm deadband and recommended 6-month calibration interval.
Key Features:
- Infrared Refrigerant Detection: Dual IR sensor technology for stable and selective gas monitoring.
- 0–1000 ppm Measurement Range: Suitable for low-level leak detection in mechanical spaces.
- 1 ppm Resolution: Enables precise gas concentration monitoring.
- 4–20 mA Output: Standard analog signal for integration with control systems.
- RS-485 Modbus Communication: Supports networked monitoring applications.
- Multi-Gas Compatibility: Detects R11, R12, R123, R125, R134A, and R22 refrigerants.
- Visual & Audible Alarms: LED status indicators and 65 dBA internal audible alert.
- NEMA 1 Enclosure: Designed for indoor commercial installations.
The S301-IRF-R123 delivers the reliability and precision required for refrigerant leak detection and environmental safety monitoring in commercial HVAC and industrial facilities.
