Industrial Instruments · Line Frequency Monitor Series

Line Frequency Monitor

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Universal Input 4-20 mA, 0-20 mA, 0-10V, 0-2V signals supported

SCADA / PLC RS485 Modbus RTU & analog retransmission output

6 Digit Sizes ½", 1", 2", 4", 6", 8", 12" digit heights available

Rugged Build MS powder-coated enclosure, non-fading acrylic panel

Custom Build High/low alarms, dual-side display, bespoke ranges

About This Product

Line Frequency Monitor

The Line Frequency Monitor is a precise and reliable microcontroller-based instrument designed for accurate measurement of main line frequency. With an accuracy of more than 0.02%, it ensures grid stability and optimizes power generation and synchronization in power generation and load dispatching centers, process industries, and other critical environments. Equipped with advanced accuracy capabilities of up to 2 decimal places (or up to 3 decimal places for the made-to-order version), this essential tool provides precise frequency monitoring for efficient operations.The 7-segment LED display, available in sizes from 4 to 12 inches, offers easy readability of real-time frequency measurements. Its robust design, wide operating voltage range, and suitability for power plants, manufacturing facilities, and research laboratories make it the ideal solution for accurate line frequency monitoring.

<ul><li>Measures line frequency accurately up to 2/3 decimal places</li><li>No calibration required. Easy plug and play operation</li><li>Large display visible from distance</li><li>Non blinking display</li></ul>

14+

Model Variants

Display Sizes

20+

Years Manufacturing

500+

Plants Deployed

Technical Specifications

Full Specification Table

Parameter	Specification
	LFM0X	LFM5X
Digits	4	5
Range	40.00-60.00 Hz	40.000-60.000 Hz
Resolution	0.01 Hz	0.001 Hz
Input Signal	Auto from Power Supply 4-20 mA (On Order)	Auto from Power Supply 4-20 mA (On Order)
Display Height	½ Inch, 1 Inch, 2 Inch, 4 Inch, 6 Inch, 8 Inch, 12 Inch Refer Display Size Table	½ Inch, 1 Inch, 2 Inch, 4 Inch, 6 Inch, 8 Inch, 12 Inch Refer Display Size Table
Type	DIN Mounted / Jumbo	DIN Mounted / Jumbo
Display Color	Red	Red
Power Supply	230 V AC +/- 10% 110V AC +/- 10% (On Order)	230 V AC +/- 10% 110V AC +/- 10% (On Order)
Mounting	Wall Mounting / Roof Hanging	Wall Mounting / Roof Hanging
IP Rating	IP54 / IP65	IP54 / IP65
Enclosure	MS Powder Coated	MS Powder Coated

Full dimensional drawings and wiring diagrams are in the datasheet. Download Datasheet (PDF)

Resources

Product Documentation

Line Frequency Monitor — Product Datasheet

Technical specifications, dimensions, wiring diagrams

Download

Line Frequency Monitor — Installation Manual

Wiring, setup, field programming guide

Download

Applications

Where It's Deployed

Power Generation and Distribution: Ensuring grid stability and accuracy by monitoring line frequency in power generation and distribution processes.
Manufacturing and Industrial Automation: Enabling precise synchronization and timing for machinery coordination and process control in manufacturing and industrial automation.
Research and Laboratory Applications: Providing accurate frequency measurements for instrument calibration and studying frequency effects in scientific experiments.

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