Overview
F20 is based on two temperature sensors which are positioned within the medium. The unheated sensor registers the liquid temperature, the other sensor is heated a few degrees above the medium. When medium flows, the heat generated in the sensor is conducted away by the medium. The temperature of the sensor is measured and compared to the temperature of the medium. The state of flow can be derived by the temperature difference.
Specifications
Measuring range
Water: 1…150 cm/s (0.03...5 ft/s)
Oil: 3…300 cm/s (0.1...10 ft/s)
Gas: 20…2000 cm/s (0.65...65 ft/s)
Accuracy
5% of full span
Applicable medium
Water / Oil / Gas
Repeatability
1% @ <0.6 m/s (2 ft/s)
3% @ <1.5 m/s (5 ft/s)
10% @ >1.5 m/s (5 ft/s)
Display
1 red LED (Flow velocity < switch point)
1 yellow LED (Flow velocity = swtich point)
4 greed LEDs (Flow velocity > switch point)
Electrical connection
M12 x 1
Pressure rating
100 bar (1450 psi)
Medium temperature
-20…85°C (-4...185°C)
Material
Housing: Aluminum
Probe: stainless steel 304
Protection class
IP67
Applications
Leak monitoring
Cooling system
Pump protection
Water treatment
Hydraulic and lubrication system
......
Benefits
Compact design - diameter 36mm
Protection class IP67
8 LEDs for flow and switch state
High turndown ratio