Thermal energy and BTU meters family line illustration — Illustrative family drawing · actual FM28 configuration may differ

Fedrel / Thermal energy and BTU meters

FM28

Name: Fedrel FM28
Brand: Fedrel

Electromagnetic BTU

PT100 sensor (PT1000 optional), integral/remote options, 220 VAC, RS485, ±0.5%, PN16, IP68/IP65

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

MODEL OVERVIEW

What the FM28 offers

PT100 sensor (PT1000 optional), integral/remote options, 220 VAC, RS485, ±0.5%, PN16, IP68/IP65

Manufacturer’s documented description: Fedrel product and price list, effective 20 January 2026, pp. 8–10. Options and qualifications above are retained as stated.

TECHNICAL DATA

FM28 specifications

Parameter	Documented value
Measuring principle	thermal energy btuFedrel product and price list, effective 20 January 2026, 8–10
Installation style	Integral/remote optionsS17 · 11
Nominal diameter (DN)	15, 20, 25, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 400S17 · 11
Accuracy statement	±0.5% as printed; basis not stated in this blockS17 · 11
Fluid temperature	−20 to 150°C family block; exact liner limit must be confirmedS17 · 11
Wetted materials	SS316L electrode; PTFE / hard-rubber liner optionsS17 · 11
Connections	ASME B16.5 Class150 flangesS17 · 11
Sensor protection	Sensor IP68S17 · 11
Transmitter protection	IP65S17 · 11
Power supply	220 VACS17 · 11
Included outputs	RS485 Modbus RTUS17 · 11
Body material	SS304 flow tubeS17 · 11
Pressure designation	PN16S17 · 11
Temperature sensor	PT100 standard; PT1000 on requestS17 · 11

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.

A water-volume meter tells you how much water passed. A thermal energy meter combines flow with supply/return temperatures and a calculator to determine transferred heating or cooling energy.

Full thermal energy and btu meters guide ↗

Installation and commissioning

Before the meter is selected

Matched temperature pair, thermowells and minimum ΔT
Water/glycol composition and concentration
Flow sensor position and calculator configuration
Energy units, complete-system uncertainty and output

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. 8–10. 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 FM28

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.