MHJ-98 Microwave Leakage Detector

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MHJ-98 Microwave Leakage Detector

Product ID：HFSchq004

Price: Please inquire PDF Format

Supply Ability:50SETS/MON

Port:SHENZHEN

Product Introduction
Other information

Model NumberMHJ - 98

Brand NameNJHUIYAN

Payment TermsTT，PAYPAL，Alibaba.com Pay

MHJ-98 Microwave Leakage Detector

Product Introduction
The MHJ-98 Microwave Leakage Detector is a portable measuring instrument designed to detect microwave energy leakage from microwave ovens, industrial microwave equipment, and other microwave-emitting devices. It measures microwave power density across a frequency range of 0.9–3 GHz, making it suitable for microwave safety inspections, equipment maintenance, and industrial radiation leakage monitoring.
Equipped with an imported microwave sensor chipset, a high-precision analog-to-digital conversion chip, and an LED digital display, the MHJ-98 provides clear and direct measurement readings. Its automatic zeroing and startup self-test functions simplify operation, while adjustable alarm thresholds enable users to configure audible and visual warnings according to their monitoring requirements.
The detector also features an external switching output that can be connected to compatible control systems. When the measured microwave power density exceeds the preset threshold, the output can support external equipment shutdown or other control actions, subject to the connected system's configuration. Its compact size and lightweight design make it convenient for field inspections and routine safety testing.

Performance Features
1. Wide Frequency Coverage: Operates across 0.9–3 GHz for measuring microwave leakage from compatible equipment.
2. Digital Measurement Display: Features an LED digital display and high-precision analog-to-digital conversion for straightforward reading of measured power density.
3. Imported Microwave Sensor: Uses an imported microwave sensor chipset for microwave leakage detection.
4. Automatic Startup Self-Test: Checks instrument operation during startup to support reliable measurement preparation.
5. Automatic Zeroing: Simplifies instrument setup and helps establish a measurement baseline.
6. Adjustable Alarm Threshold: Allows users to set the microwave power density alarm threshold through the instrument's control panel.
7. Audible and Visual Alerts: Provides sound and light alarms when the measured value exceeds the configured threshold. The factory alarm setting is above 5 mW/cm².
8. External Switching Output: Provides one switching output for integration with compatible equipment control circuits or industrial control systems.
9.Continuous-Wave and Pulsed-Wave Measurement: Supports measurements under continuous-wave and pulsed-wave conditions, with the displayed value representing average power density.
10. Portable and Lightweight Design: Measures 100 × 210 × 35 mm and weighs approximately 0.5 kg, making it suitable for on-site inspections.

Working Principle
The MHJ-98 Microwave Leakage Detector operates by sensing microwave electromagnetic energy and converting the detected signal into a measurable power density value.
When microwave energy leaks from equipment such as a microwave oven or industrial microwave system, the detector's microwave sensor receives the electromagnetic signal. The instrument's electronic circuitry processes the sensor output and converts it into a digital measurement displayed on the LED screen.
The measured average microwave power density is compared with the user-defined alarm threshold. If the reading exceeds the preset value, the instrument activates its audible and visual alarms. At the same time, the external switching output can provide a control signal for a compatible external system, allowing configured actions such as equipment shutdown.

Technical Parameters

Parameter	Specification
Model	MHJ-98
Instrument Type	Portable Microwave Leakage Detector
Microwave Frequency Range	0.9–3 GHz
Microwave Power Density Range	0.01–9.99 mW/cm²
Operating Temperature	-10°C to 40°C
Relative Humidity	66% ± 15% (as specified by the manufacturer)
Display	LED digital display
Sensor	Imported microwave sensor chipset
Startup Function	Automatic self-test
Zeroing Function	Automatic zeroing
Alarm Type	Audible and visual alarm
Factory Alarm Threshold	Above 5 mW/cm²
Alarm Threshold Adjustment	User-adjustable across the instrument's range
Calibration Field Accuracy	±0.75 dB
Full-Scale Error at Rated Voltage	≤ ±1.5%
Waveform Compatibility	Continuous-wave and pulsed-wave signals
Displayed Measurement	Average power density
External Output	One switching output
Maximum Switching Load	DC 24 V / 1 A
Dimensions (L × W × H)	210 × 100 × 35 mm
Weight	Approximately 0.5 kg

Note: Confirm the specified relative humidity tolerance and full-scale error definition with the manufacturer before publication. The stated alarm threshold is a factory setting, not a universal microwave exposure safety limit.

Application Scenarios
• Microwave Oven Safety Inspection: Checking microwave leakage around oven doors, seals, and other potential leakage points.
• Industrial Microwave Equipment: Measuring leakage from industrial microwave heating, drying, and processing equipment.
• Equipment Maintenance: Supporting routine inspections and troubleshooting of microwave-emitting devices.
• Quality Control Laboratories: Conducting microwave leakage checks during equipment acceptance and maintenance procedures.
• Industrial Safety Management: Monitoring microwave power density around equipment operating areas.
• Equipment Interlock Systems: Providing an external switching signal for compatible shutdown or alarm control systems.
• Field Testing and Inspection: Performing portable microwave leakage measurements at different inspection locations.

MHJ-98 vs. Conventional Microwave Leakage Detectors

Feature	MHJ-98 Microwave Leakage Detector	Conventional Microwave Leakage Detectors
Frequency Range	0.9–3 GHz	Depends on model
Measurement Range	0.01–9.99 mW/cm²	Depends on model
Display	LED digital display	Analog or digital, depending on model
Startup Self-Test	Supported	Depends on model
Automatic Zeroing	Supported	Depends on model
Alarm System	Adjustable audible and visual alarms	Depends on model
External Switching Output	One output, up to DC 24 V / 1 A	Optional or model-dependent
Signal Measurement	Continuous-wave and pulsed-wave signals; displays average power density	Depends on model
Portability	Approximately 0.5 kg	Depends on model
Typical Applications	Microwave ovens, industrial microwave equipment, and field inspections	Depends on frequency coverage and configuration

Frequently Asked Questions
1. What is the MHJ-98 Microwave Leakage Detector used for?
The MHJ-98 measures microwave power density associated with leakage from microwave ovens, industrial microwave equipment, and other compatible microwave-emitting devices.
2. What is the measurement range of the MHJ-98?
The instrument measures microwave power density from 0.01 to 9.99 mW/cm² across its specified operating frequency range of 0.9–3 GHz.
3. Does the MHJ-98 support automatic alarms?
Yes. It provides audible and visual alarms when the measured power density exceeds the configured threshold. The factory alarm setting is above 5 mW/cm², and users can adjust the threshold through the control panel.
4. Can the alarm threshold be customized?
Yes. The user can configure the alarm threshold within the instrument's measurement range to suit the intended monitoring application. The chosen threshold should be based on applicable regulations and the relevant equipment requirements.
5. Can the MHJ-98 trigger external equipment shutdown?
The instrument provides one external switching output rated for a maximum load of DC 24 V / 1 A. When the measured value exceeds the preset threshold, this output can be integrated into a compatible control circuit for shutdown or other control actions. Proper interface design and electrical compatibility must be verified.
6. Can the MHJ-98 measure pulsed microwave signals?
Yes. It supports both continuous-wave and pulsed-wave operating conditions. The displayed reading represents average power density, so it should not be interpreted as peak pulse power density.
7. Is the MHJ-98 suitable for field inspections?
Yes. Its compact dimensions of 210 × 100 × 35 mm and approximate weight of 0.5 kg make it convenient for portable inspection and routine equipment maintenance.
8. What environmental conditions are required for operation?
The specified operating temperature is -10°C to 40°C, with relative humidity listed as 66% ± 15%. Avoid exposing the sensor to strong light, as indicated by the manufacturer.
9. Does the MHJ-98 measure all types of microwave radiation?
No. Its specified frequency range is 0.9–3 GHz. Before use, confirm that the frequency range and measurement characteristics are appropriate for the equipment being tested. The detector should not be assumed to measure frequencies outside its specified range.

Frequently Asked Questions
1. What is the MHJ-98 Microwave Leakage Detector used for?
The MHJ-98 measures microwave power density associated with leakage from microwave ovens, industrial microwave equipment, and other compatible microwave-emitting devices.
2. What is the measurement range of the MHJ-98?
The instrument measures microwave power density from 0.01 to 9.99 mW/cm² across its specified operating frequency range of 0.9–3 GHz.
3. Does the MHJ-98 support automatic alarms?
Yes. It provides audible and visual alarms when the measured power density exceeds the configured threshold. The factory alarm setting is above 5 mW/cm², and users can adjust the threshold through the control panel.
4. Can the alarm threshold be customized?
Yes. The user can configure the alarm threshold within the instrument's measurement range to suit the intended monitoring application. The chosen threshold should be based on applicable regulations and the relevant equipment requirements.
5. Can the MHJ-98 trigger external equipment shutdown?
The instrument provides one external switching output rated for a maximum load of DC 24 V / 1 A. When the measured value exceeds the preset threshold, this output can be integrated into a compatible control circuit for shutdown or other control actions. Proper interface design and electrical compatibility must be verified.
6. Can the MHJ-98 measure pulsed microwave signals?
Yes. It supports both continuous-wave and pulsed-wave operating conditions. The displayed reading represents average power density, so it should not be interpreted as peak pulse power density.
7. Is the MHJ-98 suitable for field inspections?
Yes. Its compact dimensions of 210 × 100 × 35 mm and approximate weight of 0.5 kg make it convenient for portable inspection and routine equipment maintenance.
8. What environmental conditions are required for operation?
The specified operating temperature is -10°C to 40°C, with relative humidity listed as 66% ± 15%. Avoid exposing the sensor to strong light, as indicated by the manufacturer.
9. Does the MHJ-98 measure all types of microwave radiation?
No. Its specified frequency range is 0.9–3 GHz. Before use, confirm that the frequency range and measurement characteristics are appropriate for the equipment being tested. The detector should not be assumed to measure frequencies outside its specified range.