FM250 Technical Specification

Updated February 14, 2026 1 min read


 

Technical Specification FM250 Flow Monitor

Overview

The WaterCompass FM250 offers effortless installation on any meter employing a magnetic-coupled register or a pulse output meter. This flow monitor seamlessly integrates without disrupting meter functionality, enabling installation even while water is flowing—eliminating the need for water shut-off or pipe cutting. Its battery-powered operation eliminates the necessity for wiring, electrician assistance, or trench digging, facilitating a straightforward, non-invasive setup process.

Technical Information

Size

L: 4”

W: 4”

H: 2.5”

Weight

1.675 lbs.

Antenna connection

Female SMA Connector

Cable length

Sensor - 12 ft.

Pulse Dongle 1 ft.

Battery Life

5 years

Data Inputs

Magnetic Sensor or Dry Contact Pulse

Data Collection

Data uploaded daily

FCC ID

2ANPǪ00NRF9160 & X8WBM833F

Operating Temp Range

50°C (32° 122°F)

Accuracy in Water Meter Flow Range

+\- 5% of meter reading

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