London Electronics Model N21 graphical-screen digital panel meter

London Electronics has released a compact and easy-to-use panel meter that can be configured with a USB connection. Being graphical, it allows users to create digital and bar graph representations of their measurements. The sealed, IP65-rated front panel makes the device suitable for installation in wet areas.

All configuration settings can be saved to a file that also stores the meter’s serial number, which is suitable for QA traceability. The meter accepts 24 VDC, 24 VAC, 110 VAC or 230 VAC and has the capability to give a 24 VDC output at up to 30 mA to power a 4-20 mA loop. A configurable alarm relay is provided and the product can customise the units of measure to suit the user’s requirements.

The input signal can be averaged over a chosen timespan from 0.5 to 20 s. The alarm relay is rated 250 VAC 0.5 A resistive load. It can have a programmable delay from 0 to 3600 s to prevent nuisance alarming caused by short-term variations.

The meter is suitable for the following applications: temperature measurement; tank contents measurement; pressure measurement; DC current measurement via shunt; weight indication; tidal height indication; borehole water table indication; humidity measurement.