RCM Flow Meters
Digital Display, Transmitter & Air Survey
Options RW3 & DR-1 · 4–20 mA Transmitters · Compressed Air Survey Kit
Options RW3 & DR-1
Digital Flow Meter — Flowrate Indicator / Totalizer
The RCM Digital Flow Meter display is a microprocessor-driven instrument designed to display instantaneous flowrate, resettable total, and non-resettable accumulated total — all from a single 4–20 mA input signal.
RCM Digital Meter — Option RW3/DR-1
Option RW3
Self-contained 2-wire loop-powered transmitter and display in one unit. Mounts directly on the meter.
Option DR-1
Connects as a remote display to any W, W2, W3, or RW3 transmitter output. Panel-mount or remote installation.
Standard Features
- →Microprocessor-driven — displays flowrate, resettable total, and accumulated total
- →4–20 mA input (passive or active); powered by 24 Vdc external supply
- →Large transflective LCD — seven 17 mm rate digits, eleven 8 mm total digits
- →Scaled pulse output (max 500 Hz) referenced to accumulated total
- →Linear or square root (DP) signal processing modes
- →15-point linearization of flow curve
- →EEPROM backup — data retained during power failure (10-year minimum)
- →Programmable engineering units for both rate and total simultaneously
- →Low-flow cut-off (0.0–99.9%) to suppress leakage and signal noise
- →Filter settings 01–99 for signal stability vs. response time
- →4-digit pass code protection for setup values
- →Rugged IP67 / NEMA 4X enclosure — indoor or outdoor use
Specifications
| Specification | Value |
|---|---|
| Accuracy | ±3% F.S. |
| Repeatability | ±1% F.S. |
| Pressure Max. | 180 psig (12.6 kg/cm²) |
| Pressure Min. | 10 psig (0.67 kg/cm²) |
| Temperature Max. | 212°F (100°C) |
| Temperature Min. | -30°F (-34°C) |
| Enclosure Rating | IP67 / NEMA 4X |
| Power Supply | 20–30 Vdc (24 Vdc nominal) |
| Power Consumption | Max 1 Watt |
| Signal Input | 4–20 mA DC (passive or active) |
| Rate Display | Seven 17 mm (0.67″) digits — high intensity LCD |
| Total Display | Eleven 8 mm digits |
| Operating Temperature | -40°C to +80°C (-40°F to +178°F) |
| Humidity | 0–90% Non-condensing |
| Pulse Output | Passive transistor (NPN), max 500 Hz, 50 VDC / 300 mA |
| Pulse Width | 0.001–9.999 sec (programmable) |
| Data Protection | EEPROM backup — 10-year minimum retention |
Filter Settings (01–99)
Higher filter values increase display stability but slow response time. Set based on your process dynamics.
| Filter Value | 50% Response | 90% Response |
|---|---|---|
| 02 | 0.3 sec | 1.0 sec |
| 10 | 1.8 sec | 5.6 sec |
| 50 | 8.8 sec | 29 sec |
| 99 | 17 sec | 57 sec |
Typical Applications
Building Automation
Chilled water and hot water flow with BAS integration via 4–20 mA
Process Control
Closed-loop flow control where a signal output is required by a PLC or DCS
Energy Management
Sub-metering compressed air or water consumption with totalizer
Laboratories
Precise flow rate display and logging for research applications
OEM Equipment
Embedded in skid-mounted systems requiring digital flow indication
Utilities
Remote monitoring of flow rates in unmanned pump stations
Options W2, W3, RW3
Transmitter Option — 4–20 mA
The Flo-Gage™ can be fitted with a two-wire 4–20 mA transmitter to provide a current output for remote indication, recording, or totalization. Loop-powered and integral to the meter housing. A scaled pulse output referenced to accumulated total is standard, enabling integration with PLCs, DCS systems, and remote totalizers.
| Parameter | Value |
|---|---|
| Output Signal | 4–20 mA two-wire current loop |
| Power | Loop-powered (2-wire) |
| Use Cases | Remote indication, recording, totalization, PLC/DCS input |
| Compatibility | Available on all Flo-Gage™ liquid and gas meters |
| Mounting | Integral to meter housing |
| Options | W2 (standard), W3 (with local display), RW3 (remote display capable) |
W2 & W3 Wiring & Calibration
Detailed connection diagrams, loop impedance chart, and step-by-step calibration procedures for W2 & W3 transmitters are available. Contact Northeast Controls Inc. for the full wiring and calibration reference guide.
Compressed Air Auditing
Compressed Air Survey Kit
The RCM Air Survey Kit is a portable compressed air measurement system for auditing air consumption of tools and equipment. Identify and eliminate sources of leaks and waste — save up to 30% on compressed air usage.
Includes a Flo-Gage™ meter sized for compressed air, hose, fittings, and carrying case for quick connection to compressed air lines. Use it to measure tool consumption, identify air leaks, and improve compressed air system efficiency.
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