


Dwyer Instruments TDS112 | Thermal dispersion flow switch | PP/PPS wetted parts | 3.0" (7.6 cm) length
For process and pump protection, the Series TDS, Model TDS112 Thermal Dispersion Flow Switch provides solid state flow detection of non-coating liquids. Interfaces with distant PLCs or relay control devices are possible thanks to SPDT output. The movable switch point has an LED flow and calibration status signal, and it is factory calibrated at 0.2 frames per second. The units are not harmed by excessively varied flow velocities and have a selectable NO or NC operation.

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- Specifications
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Approvals | CE |
Connection | Electrical: 22 AWG 3-wire, 10 ft (3 m) length |
Connection | Process: 3/4" male NPT |
Consumption | 50 mA (nominal) |
Indication | LED for flow status |
Manufacturer | Dwyer Instruments |
Material | Wetted: Polypropylene/PPS or Polyvinylidene Fluoride |
Maximum Operating Pressure | 150 psi (10 bar) @ 77°F (25°C), derated @ 1.667 psi (.113 bar) per °C above 25°C |
Maximum operating temperature | 32 to 140°F (0 to 60°C) |
Mounting | 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 |
Range | 0.04 to 10 fps (1.2X10-2 to 3.05 m/s) |
Rating | Electrical: 60 VAC/60 VDC @ 1 A |
Repeatability | +/-5% of setpoint |
Response Time | 1-10 seconds |
Set Point | Adjustment: 0.04 to 3 fps (1.2X10-2 to .91 m/s) |
Set Point | Drift: 0.5% of setpoint |
Supply Voltage AC | 12 to 36 VDC |
Switch Type | SPDT. |
Type | Thermal Dispersion Flow Switch |
Viscosity | 1 to 200 centipoise |
Weight | 3 oz (94 g) |
- Services: Condensed Matter.
- Polypropylene/PPS or polyvinylidene fluoride are examples of wetted materials.
- SPDT switches are used.
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