Murata have announced the release of the third generation of the DMR20 series of round, miniature digital panel frequency monitors. Designed to measure and display AC mains frequencies in the range of 45 to 65 Hertz, over an input voltage of 85 to 264 VAC, the monitor is suitable for mounting in an industry-standard “oiltight” 30 and 30.5 mm / 1.2 inch round panel cutout. The new DMR20-1-FM-R-C is the world’s smallest, self-powered, ac line frequency monitor. Simply connect 85 to 264Vac (45-65Hz) power and the meter is fully operational—no additional components are required. The unit can also measure distorted 120Vrms power sources with triangle and square waveforms, as well as quasi sine wave outputs of dc to ac power inverters.
Equipped with a quartz crystal-controlled microcontroller-based timing circuitry the DMR20-1-FM-R-C frequency monitor is a self-powered, 2-wire meter that does not require any additional external power sources. The meter has a display resolution of one hundredth of a Hertz (0.01Hz) from 45 to 65 Hertz, making it an attractive replacement for outdated analog frequency meters and meaning that no additional components or separate power supply is required for the unit. The monitor utilises a Red LED display as standard, this gives excellent visibility in low light conditions, there is further a choice of Green or Blue LED display depending on the requirement of the application.
The unit features a rugged housing with seamless construction on all sides, providing protection to IP67 / NEMA 6 specifications for dust, dirt, and moisture. Typical applications include use in industrial and consumer backup generators, marine instrument panels, power distribution units (PDUs), off-grid power generation, portable generators, utility test sets, and as a replacement for old analog “needle-style” frequency meters.
Simple Panel Installation
Click below to view Video of DMR20 digital panel meter in waterproof application
The DMR20-1-FM-R-C ac line frequency monitor is the third model in a new line of low-cost, LED-display, digital panel meters designed to fit standard 1.2 inch round switch cutouts. The rugged polycarbonate construction offers excellent resistance to moisture, dust, and vibration, making it ideal for applications where protection from harsh environments is required. DMR20 series can operate from -25°C to +60°C.
Anglia are offering customers a FREE sample of the DMR20-1-FM-R-C Self-powered LED Digital Panel Frequency Monitor from Murata, please fill in the form below to register your interest now.
Free samples are subject to availability.
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