The Flowline Thermo-Flo™ AG12-1610 is a high-performance thermal flow switch engineered for reliable no-flow or low-flow detection in gas applications. Operating on the calorimetric principle, the sensor contains a heated element and a temperature-sensing element. As gas flows past the sensor, it dissipates heat, creating a temperature difference proportional to the flow velocity. This solid-state design has no moving parts, ensuring maintenance-free operation and long-term reliability even in demanding industrial environments.

Key Features

• Adjustable Set Point: The flow switch set point may be adjusted from 1 to 90 fps (0.3 to 27 mps) via a potentiometer, allowing field calibration for specific system requirements.
• High Repeatability: Provides ±0.5% repeatability of set point, ensuring consistent and accurate switching performance.
• Fail-Safe Relay Output: Features a 10A SPDT relay output with selectable NO/NC configuration and adjustable 0-60 second delay, providing flexible integration with pumps, valves, or alarms.
• Corrosion-Resistant Construction: Available with PP-Ryton® or PVDF wetted materials, suitable for corrosive gases and demanding chemical environments.
• NEMA 4X / IP65 Enclosure: The rugged PP enclosure is rated NEMA 4X and IP65, offering protection against dust, water, and corrosion for reliable operation in harsh industrial conditions.
• Visual Status Indication: LED indicators provide clear local status for sensor, power, and relay output, simplifying setup and troubleshooting.
• Optional Strobe Alarm: An optional flash alarm (strobe) is available to provide immediate visual attention to low-flow alarm conditions.
• Invert Switch: Allows changing the relay state from NO to NC without rewiring, reducing installation time and complexity.

Technical Specifications

• Supply Voltage: 120 / 240 VAC @ 50-60 Hz
• Power Consumption: 0.25A maximum
• Contact Type: (1) SPDT relay
• Contact Rating: 250 VAC @ 10A
• Contact Output: Selectable NO / NC
• Contact Delay: 0-60 seconds (adjustable)
• Process Connection: 3/4" NPT
• Sensor Length: Short sensor: 1.3 inches (32 mm)
• Operating Temperature (Process): 0°C to +60°C
• Operating Temperature (Ambient): -40°C to +60°C
• Temperature Compensation: Yes, for stable set point across varying process temperatures
• Electrical Connection: Conduit entry (1/2" NPT)
• Material (Housing): Polypropylene (PP)
• Material (Gasket): Viton
• Certifications: CE

Applications

The AG12-1610 is ideal for a wide range of gas flow monitoring applications, including pump and process protection, ensuring sufficient flow of coolants and lubricants, leak detection in valves, seals, and pipeline fittings, signaling no flow or low flow in cooling circuits, chemical injection flow monitoring, warning of air leakage in compressed air systems, and high/low flow alarm and general flow monitoring.

Installation & Operation

The AG12-1610 is designed for easy insertion mounting in pipes or ducting from 1/2" to 1 1/2" (short sensor). The set point is easily adjustable with a single turn of the adjustment knob. The invert switch allows changing the relay state without rewiring, and the LED indicators provide clear visual confirmation of operation. The rugged NEMA 4X enclosure and swivel base simplify conduit alignment.