Explosion-proof thermal conductivity water flow switch

I. Overview

The FTC thermal conductivity flow switch is designed based on the principle of heat exchange. The probe of this switch is equipped with a heating module and a heat sensing module inside, which achieve flow detection function through heat transfer.
The thermal conductivity is closely related to the flow velocity of the medium. If there is no medium flow in the pipeline, the heat received by the thermal module will be a constant value.
When there is medium flow, the heat received by the thermal module will change with the variation of medium flow rate. During the measurement process, this change is generated by the heating element
The thermal module generates heat, while the thermal sensing module is used to detect temperature. The flow switch will convert this temperature difference signal into a corresponding electrical signal, thereby achieving the corresponding control function.
Used to display and control the flow rate of media.
The flow probe and signal processor of FTC thermal conductivity flow switch are integrated together. The probe adopts a special anti scaling coating.
Stronger anti pollution ability; The LCD screen will display the flow rate of the medium in real-time as a percentage; The trigger threshold of the switch can also be set through buttons.
Adjustments can be made; It also provides selectable transistors or relays as output modes.

II. Main Technical Parameters

• Measurement range: Water: 3~300cm/s; Gas: 200~3000cm/s; Oil: 3~300cm/s
• Switching accuracy: ±1 to ±10 cm/s
• Warm-up time: After power-on, it will take 1 minute. During this 1-minute period, it is normal to see the display showing 8888.
• Working pressure: 100 Bar
• Medium temperature: -20°C to 80°C (conventional type), -20°C to 120°C (high-temperature type)
• Process connection: G1/2, M20X1.5 (other specifications can be customized)
• Output signal: relay (SPDT)
• Contact capacity: 30VDC/10A, 110VAC/10A, 220VAC/10A
• Power Supply: 18~32VDC
• Sensor length: 35mm (standard), other lengths available
• Display: 4-digit LCD display, 0-100%
• Consumption current: <100mA
• Response time: 0.5s, damping adjustable from 1 to 10s
• Maximum rate of change of medium temperature: 300K/min
• Electrical protection: Reverse polarity/Overload/Short circuit
• Protection level: IP67
• Electrical connection: M20X1.5 explosion-proof connection
• Probe material: ANSI304
• Body material: die-cast aluminum
• Explosion-proof: ExdiiCT6Gb (option)

III. Outline dimension drawing

IV、 Electrical connection

1. Please use RVVP4 * 0.5 shielded wire
2. After passing the wire through the waterproof plug, please tighten the waterproof plug and take waterproof and moisture-proof measures to prevent moisture from entering.
3. Please connect the wiring terminals according to the following diagram.

V Parameter Function Description

VI Setting up