EMAS RDH1S digital frequency meter panel meter with a 30 to 70 Hz measuring range, 100 to 250 V AC measurement interval, three-digit display and 1CO changeover contact.
£93.94
The EMAS RDH1S is a compact digital frequency meter panel meter designed to measure and display the frequency of an AC electrical supply. Part of the EMAS RD series, it provides clear digital indication for industrial control panels, machinery, generator systems and low-voltage power distribution equipment.
The RDH1S supports a measuring interval of 100 to 250 V AC and a frequency range of 30 to 70 Hz. Its three-digit seven-segment display allows engineers and operators to monitor supply frequency clearly, helping identify abnormal conditions that could affect motors, generators and frequency-sensitive equipment.
Operating from a nominal 230 V AC, 50 Hz supply, the RDH1S features an eight-pin connection and an integrated 1CO changeover contact. Its compact, finger-safe construction and operating temperature range of -5 °C to +55 °C make it suitable for dependable use within industrial electrical enclosures.
Frequency meters provide continuous measurement of an AC electrical supply and help operators confirm that the system remains within its intended operating range. Frequency variations can affect motor speed, generator stability, timing equipment and other sensitive electrical loads.
The EMAS RDH1S provides a clear digital reading across its 30 to 70 Hz measuring range. Its integrated changeover contact also allows the unit to support monitoring, signalling and control functions within industrial electrical systems.
| Voltage | 220 V |
|---|---|
| Manufacturer | EMAS |
| Series | RD Series |
| Model | RDH1S |
| Product type | Digital frequency meter panel meter |
| Control type | Digital |
| Measurement type | AC frequency |
| Frequency measuring range | 30 to 70 Hz |
| Voltage measuring interval | 100 to 250 V AC |
| Operational voltage | 230 V AC |
| Permitted voltage range | 0.85 to 1.1 × Ue |
| Nominal operational frequency | 50 Hz |
| Display type | Seven-segment display |
| Number of display digits | 3 |
| Connection type | 8 pins |
| Contact configuration | 1CO changeover contact |
| Operating temperature | -5 to +55 °C |
| Protection rating | IP20 |
It is used to measure and display the frequency of an AC electrical supply in industrial panels, machinery, generator systems and distribution equipment.
The EMAS RDH1S measures AC frequencies between 30 and 70 Hz.
The meter supports an AC voltage measuring interval of 100 to 250 V.
The EMAS RDH1S operates from a nominal 230 V AC, 50 Hz supply.
The RDH1S uses a three-digit seven-segment display and an eight-pin electrical connection.
EMAS digital panel meters are used by panel builders, machine manufacturers and electrical engineers to provide clear measurement and dependable monitoring within industrial electrical systems.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...