VG Instruments (SEA) Sdn Bhd
12A, Jalan Dagang SD2/1G,
Bandar Sri Damansara,
Kepong, 52200
Kuala Lumpur, Malaysia.
+603-6276 8363
+603-6276 9363

SP SERIES THERMAL DISPERSION FLOW SWITCH

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SP SERIES THERMAL DISPERSION FLOW SWITCH Finetek Thermal Dispersion Flow Switch


SP Series Thermal Dispersion Flow Switch

 

SP Series is a thermal dispersion flow switch is a precise flow sensing device for liquids. The principle of operation is based on heat transfer. The SP thermal dispersion flow switch is offered with a variety of output types and materials of construction. No moving parts make the SP series a long lasting and high value flow switch.

Description

The SP series is a thermal dispersion flow switch product line that responds to liquid flow and provides a switch output. Based on the principle of heat transfer, the SP thermal dispersion flow switch consists of two temperature sensors. One temperature sensor is the reference and measures the temperature of the fluid where the thermal dispersion flow switch probe is immersed. The second temperature sensor is heated by the SP using constant power. This creates a temperature difference between the two temperature sensors. As the flow rate of the fluid increases there is a cooling effect due to the fluid moving past the heated sensor. The more flow, the more the cooling. A reduction in temperature difference between the two temperature sensors indicates that the flow rate exceeds the user adjustable set point. When the flow rate drops there is less cooling, which causes an increase in the temperature difference. The SP series thermal dispersion flow switch is available in several versions with choices of lengths, materials of construction and output types to meet a wide range of application requirements..
 

  • No moving parts, solidstate performance and reliability
  • 1~59″ per second (150cm/s) measuring range for water; 1~118″ (300cm/s) range in oil
  • 304SS, 316SS, PVDF and polypropylene wetted parts
  • Maximum operating pressure up to 1,450psi (100bar)
  • Choice of NPN/PNP, N.O. or N.C. relay, or SPDT relay output
  • Standard and custom extended insertion lengths
  • Standard or high temperature, explosionproof units available
  • LED indication of flow status
  • Marine certified unit available
  • Detect positive flow to control downstream process
  • Ensure machinery safe operation with detection of coolant flow

INDUSTRY

  • HVAC
  • Petrochemical
  • Power
  • Food processing
  • Pharmaceutical
  • Many others
Model SP200-Compact model SP201-Extension model SP202-High Temp. model
Measuring range Water: 1~150 cm/s
Oil: 3~300 cm/s
Water: 1~150 cm/s
Oil: 3~300 cm/s
Water: 1~150 cm/s
Oil: 3~300 cm/s
Ambient temp. ­20 ~ 80°C ­20 ~ 80°C ­20 ~ 80°C
Operating temp. ­20 ~ 80°C ­20 ~ 80°C ­20 ~ 120°C
Alarm output Open Collector : NPN / PNP
Relay : 1A/30Vdc, 0.3A/125Vac (NO or NC)
(<400mA)
Operating pressure 100 bar (max.) 100 bar (max.) 100 bar (max.)
Led indication Flow velocity below set point- Red LED on, Open
Flow velocity equals set point- Yellow LED on, Close
Flow velocity above set point- 4 Green LED to indicate flow speed, Close
Housing SUS304 / 316 / 316L
Wetted part SUS304 / 3 16 / 316L
Protection level IP67
Warm-up time Approx.10 Sec Approx.15 Sec Approx.15 Sec
Connection thread G1/2, G1/4, NPT1/2 G1/2, NPT1/2 G1/2, G1/4, NPT1/2
Operating voltage 19 ~ 30Vdc
Power consumption 50mA (max.)
Wiring 3-wire NPN/PNP
Power-brown
Grounding-blue
Output-black
Accessory Gasket, 2m Cable
Model SP210
Stainless Steel model
SP170-(½)
Explosion Proof model
SP171
extension model
-(½) Explosion-proof
Measuring range Water: 1~150 cm/s
Oil: 3~300 cm/s
Ambient temp. ­20 ~ 80°C
Operating temp. ­20 ~ 80°C
Alarm output Relay: 5A/250Vac Relay: 3A/250Vac
Operating pressure 100 bar (max.)
Led indication Flow below set point- Red LED on, Open
Flow velocity equals set point- Yellow LED on, Close
Flow velocity above set point- 4 Green LED to indicate flow speed, Close
veloci
Housing SUS304
Wetted part SUS304 / 316 / 316L
Protection level IP67
Warm-up time Approx.15 Sec
Connection thread G1/2, NPT1/2
Operating voltage 19 ~ 30Vdc
Power consumption 60mA (max.)
Wiring 5-wire Relay Output
Power- red
Grounding- black
COM- white
NC- yellow
NO- blue
Accessory Gasket, 2m Cable ­­­­
Model SP220-Economy model  
Measuring range Water: 1~150 cm/s
Oil: 3~300 cm/s
 
Ambient temp. ­20 ~ 80°C  
Operating temp. ­20 ~ 80°C  
Alarm output Open Collector : NPN / PNP(<400mA)
Relay : 1A/30Vdc, 0.3A/125Vac (NO or NC)
 
Operating pressure 100 bar (max.)  
Led indication Flow below set point- Red LED on, Open
Flow velocity equals set point- Yellow LED on, Close
Flow velocity above set point- 4 Green LED to indicate
flow speed, Close
velocity
 
Housing PC  
Wetted part SUS304 / 3 16 / 316L  
Protection level IP65  
Warm-up time Approx.15 Sec  
Connection thread G1/2, NPT1/2  
Operating voltage 19 ~ 30Vdc  
Power consumption 50mA (max.)  
Wiring 3-wire NPN/PNP
Power-brown
Grounding-blue
Output-black
 
Accessory Gasket, 2m Cable  
Footnote Sensitivity and Alarm setting not available.  
 

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