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Battery and DC Powered Flange Mount Ultrasonic Flow Meter

In-Line Ultrasonic Flow Meter


Item# FDT504

In stock

Lead Time (If not in stock): 9 weeks
In-Line Ultrasonic Flow Meter FDT504 FDT504
  • Economical Ultrasonic Flow Meter for Water Service
  • Battery Powered
  • Displays Flow Rate and Total
  • 4 to 20 mA Current output standard (DC Power required)

FDT504 Model Options

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Flow Range
Pipe Diameter Range
Output Signal
Supply Power
Media Type
Form Factor
Max Process Temperature
Wetted Materials

  • Accuracy Value ±2% of reading ±5% below minimum transition rate
  • Batteries Included Yes
  • Battery Life 6 to 8 year life
  • Enclosure Material Aluminum alloy with plastic cover
  • Measurement Type Flow
  • Number of Batteries 1
  • Number of Display Digits 8
  • Power Source Battery
The FDT500 Series comprises advanced-technology water flow meters. This series uses transittime ultrasonic technology in which the signal is transmitted and received alternately between 2 flow sensors and the “time of flight” determines the flow rate. The battery-powered transmitter comes in the user’s choice of an integrally mounted display or a remotemount version. Applications include both commercial and consumable water measurement. Long-term stability and a wide measurement range make it possible not only to measure water consumption, but also to monitor systems for water leakage. Because the FDT500 Series has no moving parts, system pressure loss is minimal and filtration is not required. Display flow rate or total at the push of a button. Installation is aided by 150-lb ANSI flanges in sizes from 2 to 8" or 32 to 200 DN.

Accuracy: ±2% of reading; ±5% below minimum transition rate
Fluid Temperature: 0 to 50°C (32 to 122°F) For integral model. 0 to 90°C (32 to 190°F) For remote model.
Maximum Pressure: 230 psig
Enclosure: IP68 Electronic Housing: Aluminum alloy with plastic cover
Display: 7-segment, 8-digit, single-line LCD
Current Output: 4 to 20 mA/DC current (requires 8 to 24 Vdc supply)
Open Collector Output: 5 to 30 Vdc, 1 mA maximum
Flange: ANSI 150# or DIN
Meter Body: Cast iron
Power Supply: Internal 3.6V battery (included), 6 to 8 year life
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How do I change the battery? We have had the unit for almost a year but have never used it. Is there a tab or something to remove before use?

Asked by: Wallace
Thank you for your inquiry. In the manual, Section 6.3, has the information about the battery, battery life, and instructions on how to replace the battery. Here is the web link to obtain the manual and click on the E-G and then, scroll down to look for the general part number.
Answered by: JC ENGR
Date published: 2020-12-04

Can the meter screen be flipped upside down so that we can read it? Our pipe setup for our lab has the direction of flow going from right to left so that when the meter is installed, the screen is upside down and can't easily be read.

Asked by: ADUD
Thank you for your inquiry! Unfortunately, the meter screen is not designed to be flipped in order to change orientation and should not be tampered with in this manner.
Answered by: Application Engineer JM
Date published: 2021-08-24

When connected to Vdc does this product still require the battery.

Asked by: NP ENGR
Thanks for your question. Yes. The meter still requires the battery when connected to VDC voltage supply.
Answered by: AE HPO
Date published: 2023-06-12
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