Series TDFS2 Thermal Dispersion Flow Switch

Non-Mechanical, Low Pressure Drop, Large Pipe Sizes

The Series TDFS2 Thermal Dispersion Flow Switch is a thermal flow switch that indicates whether the flow rate is above or below a user set flow rate. The unit incorporates two LED status indicators providing visual switch indication. The set flow rate (setpoint) is easily field adjustable with included magnet and the unit has both NO and NC NPN outputs.

Product Applications

  • Boiler flow proving
  • Hot water heaters
  • Chillers
  • Liquid transfer systems

Models & Ordering

Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

Build Your Custom Part. Use our Product Configurator

Model Description Usually Ships* Price Order
TDFS2-1-P-06
Ships: Same Day
Price: $236.60
Thermal dispersion flow switch for pipe size 1/2 to 1-1/2" (15 to 40 mm), 316SS, 1/2" NPT process connection, 6' of cable with cable gland. (Standard length) Same Day* $236.60 Order
TDFS2-2-C-06
Ships: Same Day
Price: $403.60
Thermal dispersion flow switch for pipe size 2 to 10" (50 to 250 mm), 316SS, 1/2" NPT process connection, 6' of cable with conduit connection. (Extended length) Same Day* $403.60 Order
TDFS2-2-P-06-BSPT
Ships: Less Than 1 Week
Price: $403.60
Thermal dispersion flow switch for pipe size 2 to 10" (50 to 250 mm), 316SS, 1/2" BSPT process connection, 6' of cable with conduit connection. (Extended length) Less Than 1 Week* $403.60 Order

Can't find what you need? Build Your Custom Part. Use our Product Configurator

Specifications

Service:
Compatible water-based fluids.
Wetted Materials:
316SS.
Pipe Range:
1/2 to 1-1/2" (15 to 40 mm) or 2 to 10" (50 to 250 mm) (model selectable).
Set Point Range:
0.5 to 10 ft/s (0.15 to 3.0 m/s).
Repeatability:
0.07 ft/s (0.02 m/s) +3% of setpoint.
Typical Deadband:
0.1 ft/s (0.03 m/s) +15% of setpoint.
Temperature Limits:
Ambient: 5 to 140°F (-15 to 60°C); Process: 5 to 140°F (-15 to 60°C), Storage: -40 to 185°F (-40 to 85°C).
Pressure Limits:
300 psig (20.67 bar).
Response Time:
Approx. 8 s.
Power Requirement:
9 to 24 VDC.
Switching Current:
400 mA, de-rate 5 mA/°C above 23°C.
Current Consumption:
Average: 93 mA; Peak: 300 mA.
Electrical Connection:
1/2' NPT female or cable gland with 4 conductor 22 AWG 6' (1.83 m) long (model selectable).
Process Connection:
1/2" NPT or BSPT male (model selectable).
Enclosure Rating:
NEMA 4X (IP65).
Housing Materials:
316 SS, 416 SS, polycarbonate, neoprene, and acrylated urethane.
Switch Type:
1 NO NPN, 1 NC NPN.
Input Power and Protection:
0.5A fuse (resettable) reverse polarity protected.
Switched Output Protection:
0.5A fuse (resettable) reverse polarity protected.
Agency Approvals:
CE.

Features

  • Better reliability and life expectancy than mechanical flow switches with no paddles or vanes to wear or break, no jams in the paddle movement, and no seals on movement assembly to wear or leak
  • Long operation life, as it is not affected by empty pipe by avoiding overheating with heating above the process temperature and then cooling down to process temperature
  • Lower system run cost due to low pressure drop with 10% insertion into the flow (e.g. 1/8" for 3/4" schedule 40 pipe)

Accessories

Model Number Description Usually Ships* Price Order
100571-00 Replacement set point magnet Less Than 1 Week $5.40 Order
1 A-TEE-SS-1 1" NPT SS Tee Same Day $35.50 Order
1 A-TEE-SS-1-BSPT 1" BSPT SS Tee Less Than 1 Week $71.00 Order
1-1/2 A-TEE-SS-1-1/2 1-1/2" NPT SS Tee Same Day $47.00 Order
1-1/4 A-TEE-SS-1-1/4 1-1/4" NPT SS Tee Same Day $41.00 Order
1-1/4 A-TEE-SS-1-1/4-BSPT 1-1/4" BSPT SS Tee Less Than 1 Week $82.00 Order
1/2 A-TEE-SS-1/2 1/2" NPT SS Tee Same Day $23.50 Order
1/2 A-TEE-SS-1/2-BSPT 1/2" BSPT SS Tee Less Than 1 Week $59.00 Order
3/4 A-TEE-SS-3/4 3/4" NPT SS Tee Same Day $29.50 Order
3/4 A-TEE-SS-3/4-BSPT 3/4" BSPT SS Tee Less Than 1 Week $59.00 Order
1/2 A-WLDT-CS 1/2" NPT CS Weldolet for 2-10" pipe sizes Same Day $35.50 Order
1/2 A-WLDT-CS-BSPT 1/2" BSPT CS Weldolet for 2-10" pipe sizes Same Day $35.50 Order
1/2 A-WLDT-SS 1/2" NPT SS Weldolet for 2-10" pipe sizes Same Day $47.00 Order
1/2 A-WLDT-SS-BSPT 1/2" NPT SS Weldolet for 2-10" pipe sizes Same Day $47.00 Order

Videos

Model Chart

TDFS2-X-X-X-OPT   TDFS THERMAL DISPERSION FLOW SWITCH

          1ST SYMBOL (1ST X) PIPE SIZE 
             1    1/2 TO 1-1/2" (15 TO 40 MM) PIPE SIZES     
             2    2 TO 10" (50 TO 250 MM) PIPE SIZES

          2ND SYMBOL (2ND X) ELECTRICAL CONNECTION
             C    1/2" FEMALE NPT WITH PVC CABLE FOR CONDUIT CONNECTION
             B    CABLE GLAND WITH BURIAL RATED CABLE                  
             P    CABLE GLAND WITH PVC JACKETED CABLE           

          3RD SYMBOL (3RD X) CABLE LENGTH
             ??      CABLE LENGTH IN FEET (INTEGER BETWEEN 01 AND 50)

          OPTIONS (OPT)               
             -BSPT   BSPT THREADS

Product Literature

Manuals

Catalog Pages

Product Data Sheet

SlideShare

Approvals

Drawings

Questions

Question
What flow rate does the TDFS2 work with?
Answer
The TDFS2 can withstand high flow rates and works for setpoint ranges from 0.5 to 10 ft/s (0.15 to 3.0 m/s). As this varies by pipe size, refer to the installation manual for a full flow table by pipe size for exact applicable flow ranges.
Question
Can I use this product for sediment-laden liquids?
Answer
The TDFS2 is designed for homogeneous liquids. However, it has no moving parts and can withstand sediment. As long as the installation instructions are followed and the unit is installed in a chemically compatible fluid, the TDFS2 can be used.
Question
What flow rate does the TDFS2 work with?
Answer
The TDFS2 can withstand high flow rates and works for setpoint ranges from 0.5 to 10 ft/s (0.15 to 3.0 m/s). As this varies by pipe size, refer to the installation manual for a full flow table by pipe size for exact applicable flow ranges.
Question
Can I use this product for sediment-laden liquids?
Answer
The TDFS2 is designed for homogeneous liquids. However, it has no moving parts and can withstand sediment. As long as the installation instructions are followed and the unit is installed in a chemically compatible fluid, the TDFS2 can be used.
Question
can flow switch TDFS-2 be usedin zone 1 hazardous location
Answer
Unfortunately, TDFS2 cannot be used in hazardous locations.

Photo Downloads

You must be logged in to view this content.
Click here to login to your account.

Product Reviews

Only registered users can write reviews. Please Sign in or create an account