Dwyer TDS Series Thermal Dispersion Flow Switch

Dwyer TDS Series Thermal Dispersion Flow Switch offers solid-state flow detection of non-coating liquids for pump and process protection. SPDT output allows for interfacing with remote PLC or relay control devices.

Dwyer TDS Series Thermal Dispersion Flow Switch

The adjustable switch point is factory calibrated at 0.2 fps with LED indication of flow and calibration status. Units feature selectable NO or NC operations and are not damaged by over-ranging flow velocities.

Thermal flow switches are sensors with an electrical contact output at a specific flow rate. Dwyer models provide a complete system for leak detection and feature a selectable NO or NC operation. Applications include chillers, hot water heaters, and liquid transfer systems.

Dwyer TDS Series Features

• Solid-state flow detection of non-coating liquids for pump and process protection
• The adjustable switch point is factory calibrated at 0.2 fps
• LED indication of flow and calibration status

Specification

Service	Liquids.
Wetted Materials	Polypropylene/PPS or Polyvinylidene Fluoride.
Range	Range: 0.04 to 10 fps (1.2X10-2 to 3.05 m/s)
Temperature Limits	32 to 140°F (0 to 60°C).
Pressure Limits	150 psi (10 bar) @ 77°F (25°C), derated @ 1.667 psi (.113 bar) per °C above 25°C.
Repeatability	±5% of setpoint.
Switch Type	SPDT.
Electrical Rating	60 VAC/60 VDC @ 1 A.
Electrical Connections	22 AWG 3-wire, 10 ft (3 m) length.
Process Connections	3/4" male NPT.
Mounting Orientation	Any orientation, for pipe sizes 3/4" to 1-1/2" use 3.0" (7.6 cm) length switch; for 2" to 16" pipe sizes use 4.5" (11.4 cm) length switch.
Setpoint Adjustment	0.04 to 3 fps (1.2X10-2 to .91 m/s).
Setpoint Drift	0.5% of setpoint.
Response Time	1-10 seconds.
Viscosity Range	1 to 200 centipoise.
Supply Voltage	12 to 36 VDC.
Consumption	50 mA (nominal).
Indication	LED for flow status.
Weight	3 oz (94 g).
Agency Approvals	CE.

Ref: dwyer-inst.com

Download Data Sheet: Series TDS Thermal Dispersion Flow Switch