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Home | Products | Flow | Flow Switches | Thermal Dispersion Flow Switches | SP Series

SP Series – Thermal Dispersion Flow Switches

Compact and Economy Models

FineTek SP 200 Thermal Dispersion Flow Switch
Thermal Dispersion Flow Switches Finetek SP-220
Thermal Dispersion Flow Switches Finetek SP Series

SP Series Features

  • No moving parts, solid state 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 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, explosion proof units available
  • LED indication of flow status
  • Marine certified unit available

Check also the SPX2 – Digital Type Thermal Dispersion Flow Switch.

Brand: FINETEK
Usually in stock
Request a quote
Scroll down for product range
  • Product Details
  • Technical Specs
  • Documents

Description

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.

These flow switches are a thermal dispersion product line that respond to liquid flow and provide 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, this 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.

SP Series Specifications
Model SP200 SP201 SP220 SP211
Measuring range Water: 1~150 cm/s
Oil: 3~300 cm/s
Ambient temp 20°C~60°C
Process temp 20°C~60°C 20°C~80°C 20°C~80°C 20°C~80°C
Alarm output Open Collector : NPN / PNP(<400mA)
Relay : 1A/30Vdc, 0.3A/125Vac (NO or NC)
Relay: 5A/30Vdc
Operating pressure 100 bar (max)
Indication Flow velocity below set point- Red LED on, OpenFlow 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 / 316 / 316L
Protection level IP67
Probe Length 30mm 50mm & 75mm 80mm 70mm
Operating voltage 19 ~ 30Vdc
Power consumption 60mA (max)
Plug Cable Length 2m
  • FineTek SP-SF Series Flow Switches - Brochure 2.17 MB

Product Range

Product Range:
CodeSpecificationsPriceQuantity
SP200-6-2T-P-2

Thermal Dispersion Flow Switch, Standard model, 1/4”BSP, SUS 316, PNP

$1,063.00
SP200-6-BT-P-2

Thermal Dispersion Flow Switch, Standard model, 1/2”BSP, SUS 316, PNP

$1,063.00
SP211-6-BT-C-2-008

Thermal Dispersion Flow Switch, Stainless Steel model, 1/2” BSP, SUS 316, 80mm, Relay 5A/250Vac (SPDT)

$1,469.00
All prices are in NZ$, and GST exclusive and are subject to change without notice.

Intech Instruments Ltd are the New Zealand distributor for Finetek products. Please contact the Finetek distributor in your country if you require sales or service support for Finetek products.

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