Lovato DMK81R1 single-phase True RMS digital ammeter with programmable relay output, CT ratio programming up to 10000 A, minimum and maximum value memory and DIN rail mounting.
£147.03
The Lovato DMK81R1 is a compact single-phase digital ammeter designed for accurate AC current monitoring, alarm signalling and protection in industrial switchboards, motor control centres and electrical distribution systems. It provides clear digital current indication together with programmable monitoring functions, making it ideal for protecting motors, feeders and electrical equipment.
Using True RMS measurement, the DMK81R1 delivers reliable current readings even where waveforms contain significant harmonic distortion caused by variable speed drives, UPS systems and other non-linear loads. The instrument is designed for connection via an external 5 A current transformer and supports programmable CT ratios from 5 A up to 10,000 A, allowing accurate display of primary current values.
The DMK81R1 stores minimum and maximum measured current values and incorporates a programmable changeover relay output with configurable overcurrent, undercurrent and trip delay settings. Its compact 3-module DIN rail housing makes installation simple while providing advanced monitoring and protection capabilities for industrial applications.
Continuous current monitoring helps identify overloads, underloaded equipment and abnormal operating conditions before they lead to unnecessary downtime or equipment damage. By combining accurate current indication with programmable protection functions, the DMK81R1 provides both measurement and supervisory capability within a single DIN rail instrument.
Its programmable relay output can operate alarms, disconnect contactors or interface with PLCs when configured current thresholds are exceeded. Adjustable overcurrent, undercurrent and delay settings allow the instrument to be tailored to a wide variety of industrial monitoring applications.
| Voltage | 240 V |
|---|---|
| Manufacturer | Lovato Electric |
| Series | DMK |
| Model | DMK81R1 |
| Product type | Single-phase digital ammeter |
| Measured parameter | AC current |
| Measurement method | True RMS |
| Rated current input | 5 A |
| Current measuring range | 0.05 to 5.75 A |
| Current connection | External low-voltage CT with 5 A secondary |
| Programmable CT ratio | 5 to 10,000 A |
| Measurement accuracy | ±0.5% full scale ±1 digit |
| Operating frequency | 45 to 66 Hz |
| Overload capacity | 120% of rated current |
| Auxiliary supply | 220 to 240 V AC |
| Auxiliary frequency | 50 / 60 Hz |
| Maximum power consumption | 3.6 VA |
| Maximum power dissipation | 1.8 W |
| Relay output | 1 programmable changeover contact |
| Relay rating | 8 A at 250 V AC |
| Trip delay | 0 to 900 seconds |
| Reset | Automatic or manual |
| Display | Four-digit LED |
| Mounting | 35 mm DIN rail |
| DIN width | 3 modules |
| Dimensions (W × H × D) | 53.5 × 105.4 × 63.1 mm |
| Housing | Polyamide |
| Terminal type | Fixed |
| Conductor size | 0.2 to 4 mm² |
| Maximum terminal tightening torque | 0.5 N·m |
| Rated insulation voltage | 415 V |
| Front protection | IP40 |
| Terminal protection | IP20 |
| Operating temperature | -20 to +60 °C |
| Storage temperature | -30 to +80 °C |
| Weight | Approximately 268 g |
| EAN | 8013975152263 |
| Certification | EAC |
| HS Code | 90303100 |
The DMK81R1 measures single-phase AC current using an external current transformer and displays the present, minimum and maximum measured values.
Yes. It is designed for use with an external 5 A secondary current transformer and supports programmable CT ratios up to 10,000 A.
Yes. It uses True RMS measurement to provide accurate readings even where current waveforms contain harmonic distortion.
The programmable relay can operate alarms, contactors or external control circuits when configured overcurrent or undercurrent conditions occur.
The instrument mounts directly onto a standard 35 mm DIN rail and occupies three DIN modules.
Lovato Electric digital monitoring instruments are trusted by panel builders, OEMs and maintenance engineers for dependable current monitoring, equipment protection and industrial automation applications.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...