OLED Line EMI Meter
OLED Line EMI Meter
OLED Line EMI Meter
OLED Line EMI Meter
OLED Line EMI Meter
OLED Line EMI Meter
OLED Line EMI Meter
OLED Line EMI Meter
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OLED Line EMI Meter

$140.00

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  The LHY OLED LINE EMI METER is a professional electromagnetic interference detection instrument designed to monitor electromagnetic noise in the frequency range of 10 kHz to 10 MHz on 240 VAC 50 Hz power outlets. Its built-in speaker projects amplified and demodulated AM/FM noise from the power line in real time, providing an intuitive reflection of power quality. This device quickly identifies power cleanliness, assisting both household and commercial users (particularly those with audio systems) in ensuring a pure electrical environment, thereby enhancing audio equipment performance. It is recommended to test the power line before configuring high-sensitivity audio systems to guarantee optimal sound output..

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AC Voltage: 85V-250V
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Dual-Parameter Real-Time Display

  • OLED dot-matrix screen clearly shows AC voltage (e.g., 126.1 mV) and noise voltage (e.g., 221 μV), enabling dynamic comparison before and after power conditioning.
  • Noise Progress Bar: Length adjusts in real time with noise intensity—longer bars indicate stronger interference for quick assessment.

High-Frequency Noise Detection

  • Specifically designed to measure 10KHz–10MHz high-frequency noise, covering common interference sources (e.g., AM/shortwave radio signals, motors, arcing).
  • Note: Some filters may have limited suppression effects on this frequency range; test data should be evaluated comprehensively.

Acoustic Diagnostics

  • Built-in speaker amplifies and outputs noise signals, helping users identify interference sources (e.g., radio signals or EMI from devices) via amplitude and frequency.

Convenient Power Supply

  • Directly plugs into 220V/50Hz AC outlets—no batteries required. Includes a detachable 0.8m two-core power cord.
  • Input Voltage: 85V–250V AC (50/60Hz, ±5%–10% tolerance)
  • Measurement Range: 1mV–1999mV noise voltage
  • Accuracy: ±5%@1MHz; ±5% to −50%@10KHz–10MHz
  • Display: 4-digit yellow/blue dual-color OLED screen
  • Dimensions/Weight: 132×91×41mm / 150g

Operation Guide

Plug the test lead (AC power cord) into the power source. The meter will display noise in millivolts AC. Let the meter remain plugged in for at least 30 seconds​to stabilize the readings.

General guidelines:

<50mV: Excellent

<100mV: Very good

<800mV: Good

<1000mV: Average

<1500mV: Poor

Operation conditions:

  • Indoor use only
  • Operating temperature 28∘C±10∘C
  • Humidity 0 to 90% non-condensing
  • Altitude up to 2,000 meters

Certificate: CE-LVD | IEC | ROHS | FCC

  • Free shipping on orders over $199
  • Standard delivery within 7-15 business days
  • Easy 15-day returns
  • Return items in original condition for a full refund

1. What is the difference between the OLED Line EMI Meter and LCD Wideband Powerline Noise Analyzer?

Q: What does the OLED version measure?

A: The OLED version measures absolute noise values. It shows the actual ripple/noise level directly, which reflects the real electrical noise. However, noise reduction needs to be calculated manually.

Q: What does the LCD version measure?

A: The LCD version measures relative values. You can set a reference level (for example, 100), making it easy to instantly see the percentage of noise reduction. This is faster and more convenient for comparison.

Q: Which one should I choose?

A: Choose OLED if you want real, absolute noise measurements. Choose LCD if you prefer quick, intuitive comparisons and percentage-based results.