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Series TDS Thermal Dispersion Flow Switch

Adjustable Switch Point, LED Indication

The 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/Ryton or Polyvinylidene Flouride.
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) @ 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, 10ft (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" (11.4cm) 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
Stocked Models: (in bold)
Model Number Wetted Parts Length
TDS112 PP/Ryton 3.0" (7.6 cm)
TDS212 PVDF 3.0" (7.6 cm)
TDS122 PP/Ryton 4.5" (11.4 cm)
TDS222 PVDF 4.5" (11.4 cm)
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