The LUMEL N21-00E0 is a programmable digital level meter designed for precise indication and control of liquid or bulk material levels. Compatible with potentiometric sensors (typically 0…100 Ω to 0…10 kΩ) and other resistive/voltage/current inputs, it features dual relay outputs for alarm or control functions. Housed in a robust 96x48mm DIN case with IP 54 front protection, it is ideal for tank level monitoring in marine, industrial, and water treatment applications.
DIGITAL PANEL METER – LUMEL N21
The LUMEL N21-00E0 is a highly versatile digital panel meter from the N21 series, specifically configured for level measurement applications. It acts as the display and control interface for various level sensors, making it an essential component for monitoring fuel tanks, water ballast systems, or industrial silos.
Flexible Input Configuration
This model is designed to work with a wide variety of sensors, offering great flexibility in retrofitting or new installations. It accepts:
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Resistive Sensors: Potentiometric sensors (e.g., 0…100 Ω up to 0…10 kΩ) commonly used in float-type level transmitters.
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Current Loop: 0(4)…20 mA signals from standard 2-wire or 3-wire transmitters.
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Voltage Signals: 0…5 V, 1…5 V, 0…10 V, etc.
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Potentiometer Mode: Direct connection to 3-wire potentiometers without the need for a transmitter.
Integrated Control and Alarms
The N21-00E0 configuration includes two relay outputs. These outputs are fully programmable and can be used for:
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High-level and low-level alarms (e.g., “Tank Full” and “Tank Empty”).
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Automatic pump control (filling or emptying).
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Triggering external annunciators or PLC inputs.
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Adjustable hysteresis prevents relay chattering near setpoints.
User-Friendly Operation
The device features a clear LED display that shows the current level in engineering units (e.g., Liters, Meters, %, or custom units). The front panel includes intuitive buttons for easy programming of setpoints, input scaling, and display characteristics. A programmable tare function allows for net value measurement, and the peak/valley detection helps monitor extremes .
Robust Construction for Harsh Environments
Consistent with LUMEL’s quality standards, the N21 series is built for reliability in demanding conditions. It features a compact 96×48 mm (DIN 43700) housing for flush panel mounting, with an IP 54 protection rating from the front, making it resistant to dust and water splashes in engine rooms or on outdoor panels. The standard power supply version (85…253 V AC/DC) ensures easy integration into existing control cabinets.
Specifications
| Specification | Details |
|---|---|
| Model / Type | LUMEL N21-00E0 (Digital Level Meter / Controller) |
| Input Type | Programmable: • Resistance: 0 Ω…100 Ω up to 0…10 kΩ (Potentiometric) • Current: 0(4)…20 mA, 0…5 mA • Voltage: 0(1)…5 V, 0…10 V, -5 V…+5 V, -10 V…+10 V, 0…150 mV |
| Measurement Range | -1999 to 9999 (programmable scaling) |
| Outputs (Relays) | 2 x Relay Outputs (SPDT – Single Pole Double Throw) Contact Rating: 250 V AC / 8 A (or 30 V DC / 8 A) |
| Display | LED, 4 digits (Red), Height: 14 mm |
| Auxiliary Supply | 85 – 253 V AC/DC (universal) (Config code: 00E0) |
| Power Consumption | ≤ 5 VA / 5 W |
| Accuracy | 0.1 % of range ± 1 digit |
| Additional Functions | Tare (zeroing), Peak/Valley detection, Programmable Hysteresis |
| Housing / Mounting | 96 x 48 x 100 mm (DIN 43700) / Panel Mount (Flush) |
| Protection Rating | IP 54 (front panel) / IP 20 (terminals) |
| Operating Temp. | -10°C to +55°C |
| Weight | Approx. 0.25 kg |
Datasheet
Click here to download the datasheet.
