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RDS (Refrigerant Detection System)
Flammable Gas Sensors
RDS R290
RDS R290 (Sense Air)
The RDS (Refrigerant Detection System) R290 is a refrigerant leak detection sensor module compatible with the highly flammable refrigerant R290. Its protective housing shields the sensor core from dust and water droplets, while an integrated heating element ensures stable operation even in cold environments.
This module can transmit measurement data to control systems via the Modbus protocol. Additionally, when the measured gas concentration reaches the set threshold, a digital output signal is activated. The output format can be configured as either a digital PWM signal or an analog linear signal.
RDS R290
Key features
- High accuracy
- Fast response
- Wide operating temperature range
- Compliant with IEC / UL 60335-2-40
- Outstanding reliability and long service life
- Built-in auto-calibration algorithm (ABC* algorithm)
- Available in 24V, 12V, and 5V versions
- Easy to integrate with connector included
* Automatic Baseline Correction
Specifications
Product name |
RDS R290 |
|---|---|
| Measured Gas | R290 |
| Product number | 009-3-0010: 24V 009-3-0011: 12V 009-3-0012: 5V |
Measurement range |
0 - 50% LFL |
Accuracy (*) |
±2.5% LFL |
Response time (**) |
<30s |
Power supply |
009-3-0010: 24V±10% VAC/DC 009-3-0011: 12V±10% VDC 009-3-0012: 5V±10% VDC |
| Output | Digital signal (High/Low or PWM) or Analogue voltage or Analogue current. |
Communication(***) |
Modbus over RS-485 |
Dimensions |
113 x 65 x 40 mm |
| Operation Temprature range |
-40 - 70℃ |
IP Rating |
IP66 ＆ IP67 |
| Compliance with IEC 60335-2-40 ed.7 |
yes |
Compliance with UL 60335-2-40 ed.4 |
yes |
[Notes]
* 0 - 50%LFL and -30 - 60℃, After 3 ABC period or 1 zero calibration
** When exposed to R290 with concentration 25% LFL or higher, and Detection Threshold Limit Value set to 10% of LFL (default factory setting)
*** 009-3-0012 Senseair RDS R290 5V is hardware configured for UART communication and digital output (no RS-485 or analogue outputs are available on this variant)
RDS R290
More Information...
Samples ...
RDS R32
RDS R32 (Sense Air)
The RDS module is designed for detecting refrigerant leaks in mildly flammable refrigerants classified as A2L, including R32 and R454 A/B/C. The protective housing shields the sensor core from dust and water droplets, ensuring reliable operation. Additionally, it features an integrated heating element, enabling functionality even in cold environments.
The module supports the Modbus protocol, allowing measurement data to be transmitted to control systems. It also includes an additional output pin that activates a digital output signal when the detected gas concentration reaches a configurable threshold. The output can be set to either a digital PWM signal or an analog linear output, providing flexibility in how the data is used.
RDS R32
Key features
- High accuracy
- Fast response
- Wide operating temperature range
- Compliant with IEC / UL 60335-2-40
- Outstanding reliability and long service life
- Built-in auto-calibration algorithm (ABC* algorithm)
- Available in 24V, 12V, and 5V versions
- Easy to integrate with connector included
* Automatic Baseline Correction
Specifications
Product name |
RDS R32 |
|---|---|
| Measured Gas | R32, R454A, R454B, R454C |
| Product number | 009-3-0007: 24V 009-3-0008: 12V 009-3-0009: 5V |
Measurement range |
0 - 50% LFL |
Accuracy (*) |
±2.5% LFL |
Response time (**) |
<30s |
Power supply |
009-3-0007: 24V±10% VAC/DC 009-3-0008: 12V±10% VDC 009-3-0009: 5V±10% VDC |
| Output | Digital signal (High/Low or PWM) or Analogue voltage or Analogue current. |
Communication(***) |
Modbus over RS-485 |
Dimensions |
113 x 65 x 40 mm |
| Operation Temprature range |
-40 - 70℃ |
IP Rating |
IP66 ＆ IP67 |
| Compliance with IEC 60335-2-40 ed.7 |
yes |
Compliance with UL 60335-2-40 ed.4 |
yes |
[Notes]
* 0 - 25%LFL and -30 - 60℃, After 3 ABC period or 1 zero calibration
** When exposed to R32 with concentration 25% LFL or higher, and Detection Threshold Limit Value set to 10% of LFL (default factory setting)
*** 009-3-0009 Senseair RDS R32 5V is hardware configured for UART communication and digital output (no RS-485 or analogue outputs are available on this variant)
RDS R32
More Information...
Samples ...
About Senseair
Senseair, which became a member of the Asahi Kasei Microdevices (AKM) Group in 2018, is a provider of gas sensors using NDIR: Non-Dispersive InfraRed technology. Our goal is to constantly develop and mass-produce new gas sensor technologies.
