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.
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
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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