Description
The Trumeter MAX Meter M21 is a large-format Advanced Panel Meter (APM) for voltage, current, frequency and power measurement, built around a bigger 81.5 × 66mm display with a 60-segment bar graph and RGB colour-changing backlight in a 108 × 108 × 45mm DIN 108×108 enclosure — a step up in screen size and visibility from the standard 96×96 APM range.
This variant is fitted with a 100–240V AC universal power supply and Modbus RTU only communications, with true RMS sensing, 1% accuracy on voltage/current/power readings, and 16 preset configurations plus 20-point non-linearization for fast field setup via the free APM configuration software.
This variant uses a negative (dark-background) LCD, giving strong contrast in normal indoor and panel-mounted lighting conditions. Two independent alarm setpoints and three outputs — two digital open-collector plus one analog 4–20mA retransmission output — are fitted as standard, along with Trumeter Cloud remote monitoring support.
Typical applications include main switchboard and plant-room voltage/current/frequency monitoring, generator and standby-supply indication, and any installation where the larger 81.5 × 66mm display and RGB backlight are needed for visibility from a distance or across a busy control room.
Specifications:
- Measurement: Voltage, current, frequency, power
- Accuracy: 1% of reading, true RMS sensing
- Display: 81.5 × 66mm screen, 60-segment bar graph, RGB colour-changing backlight, negative LCD contrast
- Power supply: 100–240V AC universal
- Communications: Modbus RTU only
- Alarms/Outputs: 2 independent alarm setpoints, 3 outputs (2× digital open-collector + 1× analog 4–20mA)
- Configuration: 16 preset configurations, 20-point non-linearization, free APM software via USB
- Dimensions: 108 × 108 × 45mm (108×108 DIN panel cutout)
- Brand: Trumeter
