Flow - Series AD | Tecfluid

Flow Switch / Flow Indicator Tecfluid AD

The Tecfluid AD series is designed for flow monitoring of liquids and gases. It utilizes a mechanical return disk with magnetic coupling to the indicator, reed switches, or transmitter. The detection system is isolated from the process medium, which is critical in applications requiring a sealed separation between mechanical components and electrical outputs.

Operating Range and Connections

• Water flow: 0.25–270 l/min
• Air flow: up to approx. 130 Nm³/h
• AD series accuracy: ±5% full scale
• Operating pressure: PN16
• Fluid temperature: -20…+100 °C
• Connections: ¼” to 2½” BSP / NPT
• Body materials: brass, anodized aluminum, or EN 1.4404 / AISI 316L

Outputs and Configuration

The AD15 variant functions as a flow switch with 1 or 2 adjustable reed switches. The ADI15 adds local flow indication and can be equipped with reed switches, NAMUR EN 60947-5-6 inductive sensors, or a TH6 / TH6H 4–20 mA transmitter (HART available on TH6H). MODBUS RTU RS485 converter is also available.

Typical Applications

• Monitoring of cooling circuits in machinery and process systems
• Hydraulic and lubrication circuits
• Thermal oil circuits
• Gas flow control
• Equipment protection against low or zero flow

Installation and Maintenance

Selection should consider flow direction: vertical up, vertical down, or horizontal (left/right). Electrical installation requires protection of reed contacts from overload and proper cable gland sealing. The AD series requires minimal periodic maintenance; checks are limited to zero indication, mechanical freedom of the indicator, and electrical verification of setpoints.

Certifications

Complies with PED 2014/68/EU, EMC 2014/30/EU, WEEE 2012/19/EU, and for hazardous areas, ATEX 2014/34/EU with Ex ia versions available.