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Last Updates: 28/11/2020

Dwyer Series TDS Thermal Dispersion Flow Switch

The Dwyer Series TDS 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 device. 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 operation and are not damaged by over-ranging flow velocities.

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.

Manuals: Instruction Manual
Catalog Pages: Series TDS Catalog Page

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