Features
Type 237 flow sensors operate according to the vortex principle, which is based on the Kármán vortex street. This non-mechanical measuring method enables precise and wear-free flow measurement without recalibration. The robust Stainless steel construction ensures high long-term stability and reliability, even in demanding environments. The sensor is designed for Medium temperatures from -15 to +125 °C and is suitable for applications ranging from cryogenic cooling to high temperature processes, such as in injection moulding plants. Integration into existing systems is greatly simplified by the M12x1 connector with IP65 and the plug-and-play design. The type 237 was developed for OEM applications that require precise, maintenance-free and long-term stable flow measurement.
•Measuring element without media contact for maximum resistance
•Optional temperature measurement of the medium
•Low pressure loss with high measurement accuracy
•Dirt-resistant design of the measuring element
•Various output signal options
•Electrical connection M12x1 with IP65
•Measuring element without media contact for maximum resistance
•Optional temperature measurement of the medium
•Low pressure loss with high measurement accuracy
•Dirt-resistant design of the measuring element
•Various output signal options
•Electrical connection M12x1 with IP65
Applications
AHU / CDU / In-Rack CDU
Specification
| Product Feature | |
|---|---|
| Flow measurement principle |
Vortex flow rate |
| Measuring range flow rate (Overview) |
1,1 ... 240 l/min |
| Nominal width |
8; 10; 15; 20; 25; 32 |
| Accuracy < 50 % measuring range end value (Water) |
<1 % FS |
| Accuracy > 50 % measuring range end value (Water) |
<2 % (Measured value) |
| Switch-on delay |
<100 ms (Immediate response time; can be used for tapping operation) |
| Response time |
5 ... 500 ms |
| Switch-on delay (seconds) |
<2 s |
| Repeatability |
±0,5% |
| Sensor type |
Flow sensor, optionally with temperature measurement |
| Measuring range flow rate |
1,1 ... 240 l/min |
| Temperature measuring range |
-40 ... 125 °C |
| Temperature measuring principle |
PT1000 (Class B DIN EN 60751) |
| Field of Application | |
| Media |
Heating water with standard additives; Drinking water; Other media on request |
| Medium temperature |
-15 ... 125 °C (Non-freezing media) |
| Maximum test pressure (at 40 °C medium temperature) |
18 bar |
| Cavitation |
>5,5 (Equation to avoid cavitation: P abs outlet / P difference) |
| Maximum system pressure (medium temperature up to 90 °C) |
7 bar |
| Maximum pressure impact resistance (at 90 °C medium temperature) |
on request |
| Recommended minimum system pressure |
1 bar |
| Ambient Condition | |
| Ambient temperature |
-15 ... 85 °C |
| Storage temperature |
-30 ... 85 °C |
| Material | |
| Sensor paddle with media contact |
ETFE |
| Housing with media contact |
Stainless steel |
| Sealing material with media contact |
FKM; EPDM (perox.) |
| Electrical Data | |
| Electrical connection |
M12x1 connector |
| IP protection class |
IP 65 |
| Temperature output |
PT1000 |
| Temperature output |
0 ... 10 V |
| Temperature output |
4 ... 20 mA |
| Inverse-polarity protection |
Short-circuit and reverse polarity protected. Each connection against each other with max. supply voltage. |
| Approval | |
| EMC compatibility |
CE-compliant in accordance with EN 61326-2-3 |
| Temperature Measurement | |
| Influence (self-heating temperature sensor) |
1 K/mW |
| Influence (conduction resistance to connector) |
0,8 Ohm |
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Note : Design and specifications are subject to change without notice.
Note : Please make sure the product and the device which connect with RS-485 are on common ground, avoid damaged product.