F20 - Thermal
Flow Switch
Highly stable flow switch for all industries
Applicable to water, gas or oil
Compact design
8 LEDs for flow and switch state
Easy to use and use
Introduction
F20 equips two temperature sensors, one is for the liquid temperature, the other one is heated a few degrees over the medium. Based on the principle of heat transfer, where the heated sensor within the fluid flow experiences cooling proportional to the flow velocity; the faster the fluid flows, the more heat is carried away from the sensor, resulting in a measurable temperature difference which can be used to determine the flow rate and trigger a switch action when it reaches a preset threshold.
Features
Applicable to liquid or gas
Compact design
Protection class IP67
8 LEDs for flow and switch state
High turndown
Specifications
Set point range
Water: 0.03...5 ft/s (1…150 cm/s)
Oil: 0.1...10 ft/s (3…300 cm/s)
Gas: 0.65...65 ft/s (20…2000 cm/s)
Applicable medium
Water / Oil / Gas
Repeatability
1% @ < 2 ft/s (0.6 m/s)
3% @ < 5 ft/s (1.5 m/s)
10% @ > 5 ft/s (1.5 m/s)
Pressure resistance
1450 psi (100 bar)
Display
Red LED (Flow velocity < switch point)
Yellow LED (Flow velocity = switch point)
Green LED (Flow velocity > switch point)
Medium temperature
-4...176°F (-20…80°C)
Material
Housing: Aluminum
Probe: stainless steel
Output
PNP (NC + NO)
NPN (NC + NO)
RELAY (NC + NO)
Applications
Leak monitoring
Cooling system
Pump protection
Water treatment
Hydraulic and lubrication system
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