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
Starting at $325.95
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.
- Compliance:
- 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)
Product Literature
Manuals
Catalog Pages
Product Data Sheet
SlideShare
Approvals
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 THREADSQuestions
- 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.
Write Your Own Review
| Model | Description | Availability* | Price | |
|---|---|---|---|---|
| A-TEE-SS-1/2 | 1/2" NPT SS Tee | Less Than 1 Week* |
$31.80 |
|
| A-TEE-SS-3/4 | 3/4" NPT SS Tee | Less Than 1 Week* |
$39.20 |
|
| A-TEE-SS-1-1/4 | 1-1/4" NPT SS Tee | Less Than 1 Week* |
$54.60 |
|
| A-TEE-SS-1-1/2 | 1-1/2" NPT SS Tee | Less Than 1 Week* |
$62.90 |
|
| A-TEE-SS-1/2-BSPT | 1/2" BSPT SS Tee | Less Than 1 Week* |
$79.05 |
|
| A-TEE-SS-3/4-BSPT | 3/4" BSPT SS Tee | Less Than 1 Week* |
$79.05 |
|
| A-TEE-SS-1-1/4-BSPT | 1-1/4" BSPT SS Tee | Less Than 1 Week* |
$109.20 |
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