Inline ultrasonic water meters family line illustration — Illustrative family drawing · actual FM22 configuration may differ

Fedrel / Inline ultrasonic water meters

FM22

Name: Fedrel FM22
Brand: Fedrel

Ultrasonic water; DI + fabricated CS, 1.6 MPa, battery 3.6 V, RS485, ±1%, sensor IP68/transmitter IP65; remote/power alternatives optional

Connection and size scope: 50-500 mm listed steps, flanged Class150 drilling

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Supply from Hyderabad · India-wide delivery
Configuration, availability and commercial terms confirmed on quotation.

MODEL OVERVIEW

What the FM22 offers

Connection and size scope: 50-500 mm listed steps, flanged Class150 drilling

Manufacturer’s documented description: Fedrel product and price list, effective 20 January 2026, pp. 8, 12, 14. Options and qualifications above are retained as stated.

TECHNICAL DATA

FM22 specifications

Parameter	Documented value
Measuring principle	ultrasonic inlineFedrel product and price list, effective 20 January 2026, 8, 12, 14
Nominal diameter (DN)	50, 65, 80, 100, 125, 150, 200, 250, 300, 400, 450, 500S17 · 12
Accuracy statement	±1%; basis not stated in this blockS17 · 12
Connections	ASME B16.5 Class150 flangedS17 · 12
Sensor protection	IP68S17 · 12
Transmitter protection	IP65S17 · 12
Power supply	3.6 V lithium-ion battery as printedS17 · 12
Included outputs	RS485 Modbus RTUS17 · 12
Documented size scope	50-500 mm listed steps, flanged Class150 drillingFedrel product and price list, effective 20 January 2026, 8, 12, 14
Body material	Ductile iron + fabricated carbon steelS17 · 12
Pressure designation	1.6 MPaS17 · 12
Optional accessories	Other power sources and remote wall-mount display on requestS17 · 12

Details to confirm for the offered configuration

These parameters are not established as exact-model values in this record. Some may not apply to this technology.

Q1 m3 h
Q2 m3 h
Q3 m3 h
Q4 m3 h
Working pressure and temperature
Approvals and scope

DUTY & SELECTION

Where to consider this type

The guidance below explains the technology. It does not extend this model’s documented service limits.

Sensors compare sound travel in different directions through the water. The difference is used to calculate flow. Inline versions have a defined measuring body.

Full inline ultrasonic water meters guide ↗

Installation and commissioning

Before the meter is selected

Fluid acoustic conditions and bubbles
Approved Q values and orientation
Battery-life assumptions and power for outputs
Forward/reverse total treatment and data availability

Before the system is handed over

Confirm the installation drawing, orientation and access for service.
Match the actual flow range and permitted pressure loss to the project.
Record meter serial number, start reading and any output scaling.
Commission communications against the receiving system and retain the test record.

Read the installation guide ↗

Reading and communication

Documentation mentions: RS485. These may be optional or specific to a variant.

Discovery tags come from the documented description, including optional capabilities. Confirm inclusion and exact size/configuration.

A connected metering system is five parts: meter → interface or module → network or gateway → software → billing, dashboard or control system. A quotation should name who supplies and maintains each one. AMR-ready equipment may still require separately quoted radio, gateway, head-end and billing software.

Understand pulse, wired and wireless reading ↗

Documents and purchase checks

Read the Fedrel technical reference → · Browse the source index

Source: Fedrel product and price list, effective 20 January 2026, pp. 8, 12, 14. Reviewed 2026-09-09.

Download product data (JSON)Request current drawing / datasheet ↗

Ask for these before ordering

Approved drawing for the exact model, size and configuration
Serial-number calibration or factory test record
Applicable approval certificate and exact scope
Installation manual and required straight pipe
Protocol/register map and output power requirements
Option/accessory codes with included components
Pressure-loss curve, flange drilling and face-to-face length
Current written commercial and warranty terms

SPECIFY YOUR REQUIREMENT

Get a quotation for FM22

Tell us the size and quantity you need. Add the fluid, flow or output requirement if known. You can review and send the enquiry from your email app on the next page.

Price and lead time are quoted for the selected size and configuration.