Senseair RDS R290
The Senseair Refrigerant Detection System R290 is a leak detection sensor module for HVAC applications using the low GWP refrigerant R290.
A protective housing, with a high-quality gas diffusion vent, protects the sensor element from dust and condense water droplets. Thanks to the built-in heating element, the Senseair RDS can operate in cold environments.
Using Modbus protocol, the measured data can digitally be transmitted to the control system.
A digital output signal is activated whenever the measured gas concentration reaches a configurable threshold. The output can alternatively be configured as a digital PWM signal or an analogue linear output reflecting the measured gas concentration.
- Immunity to poisoning
- Complies with
- UL 60335-2-40 ed.4
- IEC 60335-2-40 ed.7
- IEC 60079-29-1
- High accuracy
- High resolution
- Fast response time
- -40 – 70 °C operating temperature
- > 15 years expected lifetime
- Maintenance-free
|
Target gas |
R290, propane (C3H8) 1 |
|
Operating principle |
Non-dispersive infrared (NDIR) |
|
Measurement range |
0─100 %LFL2 |
|
Accuracy* |
Standard range: ±2.5% LFL 2, 3 Extended range: ±5% LFL 2, 3 |
|
Response time |
< 30s 4 |
|
Operating temperature* |
-40─70°C 2 |
|
Storage temperature |
-40─85°C |
|
Pressure dependence |
1% reading per kPa deviation from normal pressure |
|
Power supply options |
24 ±10% VAC (009-3-0004 24V) 12 ±10% VDC (009-3-0005 12V) 5 ±10% VDC (009-3-0006 5V) 6 |
|
Communication interface |
Modbus over RS-485, 9600bps 5, 6 |
|
Output |
Digital signal (High/Low or PWM) or Analogue voltage or Analogue current. Digital High/Low is default factory setting. 6 |
|
Connector |
5-pin (mates with Minitek® Pwr 3.0 10136653-05LF) |
|
Maintenance |
Maintenance free with Senseair ABC |
|
Life expectancy |
> 15 years |
|
Compliance |
IEC 60335-2-40 Ed.7, UL 60335-2-40 Ed.4 |
|
Enclosure |
Injection molded plastic, UL94V-0 rated |
|
Dimensions |
107 x 53 x 23mm |
Note 1: Sensor measures molecules containing C-H bonds
Note 2: Standard range: 0–50% LFL and -30–60 °C
Extended range: 50–100% LFL and -40–70 °C
Note 3: After 3 ABC periods or 1 zero calibration and default
measurements settings
Note 4: When exposed to R290 with concentration 25% LFL or
higher, and Detection Threshold Limit Value set to 10% of LFL
Note 5: Configurable baud rate, range 9600 to 115.200bps
Note 6: 009-3-0006 5V is limited to UART communication and
digital output (no RS-485 and analogue outputs are available)
| Product | Product number |
|
Senseair RDS R32 & R454 A/B/C |
009-3-0001 24V 009-3-0002 12V 009-3-0003 5V |
|
Senseair RDS R290 |
009-3-0004 24V 009-3-0005 12V 009-3-0006 5V |