Thermal Dispersion Flow Switch Dealers

Pantech Instruments, an eminent manufacturer of process control instruments since last 15 years, has developed this type of meter by their indigenous R&D efforts. The flow meter is definitely a state of technology product, totally in line with all the industrial and gas standards. The thermal sensor uses the principle of heat dissipation. A heated sensor is inserted into the stream of gas flow. The cooling effect of the gas is measured, transduced and interpreted as flow. The cooling effect is a direct function of the heat transfer that takes place due to the flow of gas. The heat transfer in turn is a direct function of the velocity as well as density of the process gas. Hence variations in temperature and pressure in the process gas are automatically compensated. For all practical purposes the output signal obtained is pressure and temperature compensated “massflow” signal. Thus the compensated flow independent of pressure and temperature variation is indicated without need for any separate transducers for the same.

• Operating Temperature: -14 Degree F To 140 DegreeF (-10 DegreeC To 60 DegreeC)
• Flow Rate: 0.5 LPM To 41 LPM
• Model Number: FS-600
• Operating Pressure (Max.): 363 PSIG (25 bar)
• Port Size: 1/2
• Body Material: Stainless Steel

• Voltage: 200VDC
• Power Consumption: 9 to 24 VDC
• Pressure Limits: 300 psig (20.67 bar)
• Process Connection: 1/2
• Switch Type: 1 NO NPN, 1 NC NPN

The Thermal Flow Switch Monitor SP-150 is based on the principle of thermal dispersion. A typical configuration uses two Temperature Detectors set within the tip of the sensor. One Temperature Detector is heated a few degrees above the other one. As the process medium flows over the tip of the sensor it disperses some of the heat from the heated Temperature Detector. The delta temperature is a function of flow velocity and converted into electronic signal. The open collector changes state once the set point has been reached.  

• calibrated: 0.2 fps

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.

• Type: Thermal Dispersion Flow Meter
• Material: Plastic
• Color: Red
• Voltage: 12 To 36 Vdc
• Operating Temperature: 10-50D/C
• Driven Type: Electric
• Certificate: Yes
• Warrenty: 1 Year
• Feature: Accuracy, Digital Water Meter Display, Lorawan Compatible, Multi Jet, Spiral Water Meter
• Application: Industrial
• Automatic Grade: Automatic, Fully Automatic, Manual, Semi, Semi Automatic
• 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.

The general purpose gas flow switch is a great choice for a broad range of relatively clean gases with non-coating characteristics. Media examples include nitrogen and scrubber exhaust fumes. The 1A relay provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm. The short sensor is intended for use in pipe or ducting from 12” to 1-12”; the long sensor is applied in 2” and up. The switch set point may be adjusted from 1 to 90 fps. The product is broadly selected for low or no-flow applications.