RJ-3 Electromagnetic Field Meter

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RJ-3 Electromagnetic Field Meter

Product ID：HFSchq003

Price: Please inquire PDF Format

Supply Ability:50SETS/MON

Port:SHENZHEN

Product Introduction
Other information

Model NumberRJ - 3

Brand NameMEGAOPIN

Payment TermsTT，PAYPAL，Alibaba.com Pay

RJ-3 Electromagnetic Field Meter

Product Introduction
The RJ-3 Electromagnetic Field Meter is designed to measure near-field electric and magnetic field strength in medium-wave and shortwave high-frequency environments. With a compact design, portable construction, and straightforward operation, it supports electromagnetic field assessments around industrial and RF equipment.
The RJ-3 high-frequency near-field meter is suitable for occupational health and safety, environmental protection, public health monitoring, and scientific research. It helps users assess field-strength levels around high-frequency equipment, identify potential exposure areas, and determine whether appropriate protective measures are needed in accordance with applicable standards.

Performance Features
• Wide frequency coverage: Supports a specified frequency range from 20 Hz to 200 MHz.
• Three measurement ranges: Provides three selectable ranges for different field-strength levels.
• Portable design: Weighs approximately 2 kg for convenient transport and field inspections.
• Simple operation: Designed for practical measurement in industrial and environmental settings.
• Broad application range: Suitable for assessing electromagnetic fields around RF and high-frequency equipment.
• Battery powered: Operates using two 6 V stacked batteries.

Working Principle
The RJ-3 measures electromagnetic field strength within its specified frequency range and displays the corresponding field-strength reading. Its three measurement ranges allow users to select a suitable range according to the expected field level.
By measuring near-field strength around operating equipment, users can assess the electromagnetic environment and compare readings with relevant occupational safety or environmental requirements. Specific probe characteristics and signal-processing details should be confirmed with the manufacturer.

Technical Specifications

Parameter	Specification
Model	RJ-3
Instrument Type	High-Frequency Near-Field Electromagnetic Field Meter
Frequency Range	20 Hz–200 MHz
Overall Measurement Range	0–450 V/m
Range 1	0–30 V/m
Range 2	30–150 V/m
Range 3	50–450 V/m
Overall Measurement Error	≤ ±30%
Power Supply	Two 6 V stacked batteries
Operating Temperature	−10°C to +40°C
Operating Humidity	<80% RH
Package Dimensions	440 × 320 × 120 mm
Weight	Approximately 2 kg

Application Scenarios
The RJ-3 electromagnetic field meter can be used for field-strength surveys and exposure assessments around:
•    High-frequency welding machines
•    High-frequency heat-sealing equipment
•    High-frequency induction hardening systems
•    RF medical equipment
•    FM broadcasting transmitters
•    Television broadcasting transmitters
•    Industrial and research RF facilities
•    Occupational health and environmental monitoring sites
•    Universities, factories, public health institutions, and military facilities

RJ-3 vs. General-Purpose Electromagnetic Field Meters

Comparison Item	RJ-3 Electromagnetic Field Meter	General-Purpose EMF Meter
Intended Use	High-frequency near-field measurement	Depends on model and sensor configuration
Specified Frequency Range	20 Hz–200 MHz	Varies by instrument
Electric Field Range	0–450 V/m	Varies by instrument
Range Selection	Three measurement ranges	Depends on model
Portability	Approximately 2 kg	Varies by model
Power Supply	Two 6 V stacked batteries	Battery or rechargeable power, depending on model
Typical Applications	Industrial RF equipment and workplace field surveys	General electromagnetic field assessment

Frequently Asked Questions
Q1: What does the RJ-3 electromagnetic field meter measure?
It is designed to measure field strength in high-frequency electromagnetic environments, particularly around industrial and RF equipment.
Q2: What is the frequency range of the RJ-3?
The specified frequency range is 20 Hz to 200 MHz.
Q3: What is its maximum electric field measurement range?
The overall specified measurement range is 0–450 V/m.
Q4: Does the RJ-3 have multiple measurement ranges?
Yes. It provides three ranges: 0–30 V/m, 30–150 V/m, and 50–450 V/m.
Q5: What is the measurement error?
The specified overall measurement error is no greater than ±30%.
Q6: Which equipment can be assessed with the RJ-3?
Typical applications include high-frequency welding and heat-sealing machines, induction hardening systems, RF medical equipment, and broadcast transmitters.
Q7: Is the RJ-3 suitable for field inspections?
Yes. Its approximately 2 kg weight and battery-powered operation support portable field use.
Q8: Can the readings be used to determine electromagnetic exposure compliance?
Readings can support an initial field assessment. Compliance decisions require comparison with the applicable standards and consideration of measurement procedures, instrument suitability, and uncertainty.

Frequently Asked Questions
Q1: What does the RJ-3 electromagnetic field meter measure?
It is designed to measure field strength in high-frequency electromagnetic environments, particularly around industrial and RF equipment.
Q2: What is the frequency range of the RJ-3?
The specified frequency range is 20 Hz to 200 MHz.
Q3: What is its maximum electric field measurement range?
The overall specified measurement range is 0–450 V/m.
Q4: Does the RJ-3 have multiple measurement ranges?
Yes. It provides three ranges: 0–30 V/m, 30–150 V/m, and 50–450 V/m.
Q5: What is the measurement error?
The specified overall measurement error is no greater than ±30%.
Q6: Which equipment can be assessed with the RJ-3?
Typical applications include high-frequency welding and heat-sealing machines, induction hardening systems, RF medical equipment, and broadcast transmitters.
Q7: Is the RJ-3 suitable for field inspections?
Yes. Its approximately 2 kg weight and battery-powered operation support portable field use.
Q8: Can the readings be used to determine electromagnetic exposure compliance?
Readings can support an initial field assessment. Compliance decisions require comparison with the applicable standards and consideration of measurement procedures, instrument suitability, and uncertainty.