Fedrel / Positive displacement water meters
FM101
Rotary piston vertical; 15/20/25/40 mm
Class-C, R100/160, IP68, built-in NRV and strainer
MODEL OVERVIEW
What the FM101 offers
- Class-C, R100/160, IP68, built-in NRV and strainer
Manufacturer’s documented description: Fedrel product and price list, effective 20 January 2026, pp. 2–6. Options and qualifications above are retained as stated.
TECHNICAL DATA
FM101 specifications
| Parameter | Documented value |
|---|---|
| Measuring principle | positive displacementFedrel product and price list, effective 20 January 2026, 2–6 |
| Nominal diameter (DN) | 15, 20, 25, 40S17 · 3 |
| R ratio | R100 / R160S17 · 3 |
| Accuracy statement | Class C; ±2% at nominal flowS17 · 3 |
| Orientation | Vertical modelS17 · 3 |
| Fluid temperature | 0–45°CS17 · 3 |
| Working pressure and temperature | Maximum 16 barS17 · 3 |
| Connections | Screwed male BS21 BSPS17 · 3 |
| Sensor protection | IP68 in this block; immersion conditions not suppliedS17 · 3 |
| Included accessories | Both end couplings and inbuilt NRV/strainerS17 · 3 |
| Body material | Brass IS1264 grade DCB2S17 · 3 |
| Standards claim | ISO4064:2014S17 · 3 |
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
- Approvals and scope
DUTY & SELECTION
Where to consider this type
These meters repeatedly measure a defined volume in a chamber. A rotary piston or wobbling disc translates those cycles into accumulated volume. Nutating-disc construction is described by Badger Meter.
Installation and commissioning
Before the meter is selected
- Low-flow requirement and pressure-loss curve
- Particles, cleaning and filtration
- Orientation and any integrated NRV
- Approved flow range and temperature
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.
Reading and communication
No electronic output is established for the base record. Confirm a compatible pickup or communication variant if remote reading is required; do not assume another model’s output can be fitted.
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. 2–6. Reviewed 2026-09-09.
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 FM101
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.