In today’s world of electronic diagnostics and electrical troubleshooting, having a reliable multimeter is essential for both professionals and DIY enthusiasts. The Auto Ranging Digital Multimeter TRMS 6000 (also known as the Thsinde 18B+) has emerged as a compelling budget-friendly option that promises to deliver professional-grade features at a fraction of the cost of premium brands like Fluke. After extensive testing and analysis of user feedback, this comprehensive review examines whether this multimeter lives up to its promises and delivers genuine value for money.
Design and Build Quality
Physical Construction
The TRMS 6000 immediately impresses with its substantial build quality that defies its budget price point. The multimeter features a robust dual-molded construction with a gray plastic base encased in an orange rubber protective boot. This design choice serves both aesthetic and functional purposes – the orange color makes the device easily visible in cluttered work environments, while the rubber overmold provides shock absorption and improved grip.
The device is notably larger than many budget multimeters, measuring approximately 7.5 inches in length and featuring a full-size form factor that feels substantial in hand. This larger size, while requiring more toolbox space, contributes to the professional feel and accommodates the generous display screen. The weight distribution is well-balanced, preventing hand fatigue during extended use.
Ergonomics and User Interface
The rotary selector switch operates smoothly with positive detents at each position, providing tactile feedback that inspires confidence in selection accuracy. The switch feels robust and shows no signs of wobble or play, suggesting good long-term durability. The button layout is intuitive, with clearly labeled functions for Hold, Min/Max, Range, Select, and REL (relative) modes.
One thoughtful design element is the integrated probe storage system on the rear of the protective boot. This feature allows users to secure the test leads when not in use, though it should be noted that the alligator clips must be removed for the probes to fit properly in these holders.
The fold-out stand is a practical addition that enables hands-free operation, though some users report that it could benefit from a more secure locking mechanism to prevent accidental closure.
Display and User Experience
LCD Performance
The 6000-count LCD display represents one of the multimeter’s strongest features. The large, high-contrast screen provides excellent readability even in challenging lighting conditions. The display updates at a reasonable speed, though some users note it’s slightly slower than premium multimeters – a minor trade-off for the auto-ranging functionality.
Backlight System
The integrated backlight system significantly enhances usability in low-light environments such as automotive work, basement electrical panels, or outdoor applications. However, the backlight timer presents a notable limitation – it automatically shuts off after approximately 15 seconds and cannot be configured to remain permanently on. While this preserves battery life, many users find the timeout too short for practical applications.
Auto-Ranging Functionality
The auto-ranging capability sets this multimeter apart from many competitors in its price range. This feature automatically selects the most appropriate measurement range, eliminating guesswork and reducing the likelihood of user error. The system works reliably across all measurement types, though manual range selection remains available for users who prefer more control over their measurements.
Measurement Capabilities and Accuracy
Voltage Measurements
The TRMS 6000 excels in voltage measurement applications, handling both AC and DC voltages with impressive accuracy. Real-world testing against calibrated Fluke meters shows voltage readings typically within 0.1% of reference standards. The multimeter comfortably measures household mains voltage (120V AC) with readings consistently around 119-120V, demonstrating excellent calibration from the factory.
For DC applications, the meter shows similar accuracy across its range, from battery testing (1.5V, 9V) to automotive applications (12V systems). The high input impedance (>11 MΩ in voltage ranges) ensures minimal circuit loading, making it suitable for sensitive electronic measurements.
Current Measurements
Current measurement capability spans from microamps to 10 amperes, covering the needs of most residential and light commercial applications. The meter includes proper safety features with appropriately rated fuses – a 0.5A fast-blow fuse for the milliamp ranges and a 10A fuse for high-current measurements. These are proper ceramic fuses rated for the correct voltage levels, not the inadequate glass fuses found in some budget meters.
Users should note that current measurements require moving the red test lead to the dedicated current input jacks, following standard multimeter safety protocols.
Resistance and Continuity
Resistance measurements prove highly accurate across the full range, from sub-ohm to megohm values. The continuity function features an audible beeper that responds quickly to circuit closure, though some users report the beep volume could be louder for noisy work environments.
The meter shows some limitations at very low resistance values (below 1 ohm), where lead resistance can affect accuracy. This is common among budget multimeters and doesn’t significantly impact typical applications.
Capacitance Testing
One of the standout features is the capacitance measurement capability, which many users cite as their primary reason for purchase. The meter handles capacitance measurements from picofarads to millifarads, though accuracy varies by range:
- Small capacitors (100-1000pF): Accuracy suffers significantly, with readings often 10-25% low
- Mid-range capacitors (2.2nF-100µF): Generally accurate within 5-10%
- Large electrolytic capacitors: Good accuracy for most values, though some very large capacitors may read high
Frequency and Duty Cycle
The frequency measurement function operates reliably from 1 Hz to over 20 MHz in the dedicated Hz mode, significantly outperforming many premium meters that top out around 1 MHz. The duty cycle measurement provides useful functionality for automotive and electronics applications, though it requires adequate signal amplitude (typically 7V RMS or higher) to function reliably.
Special Features
The non-contact voltage (NCV) detection represents a convenient safety feature, though with notable limitations. The function works reliably for detecting live AC circuits in outlets and switches, but shows inconsistent performance depending on wire separation and environmental factors. Users should never rely solely on NCV for safety verification – always confirm with contact measurements.
Included Accessories and Value Proposition
Test Leads and Probes
The multimeter includes two complete sets of test leads, representing exceptional value. The standard leads feature adequate insulation and reasonable build quality, while the fine-tip probe set proves invaluable for precision work on circuit boards and automotive fuse testing.
The probe tips are well-designed with grooved surfaces to prevent slippage, and the banana plugs fit securely in the meter inputs, though initial insertion may require firm pressure on new units.
Alligator Clips
The included alligator clips represent both a value-add and a source of frustration. While their inclusion is appreciated, the clips suffer from a fundamental design flaw – they’re sized for 4mm banana plugs but have been modified to accept the 2mm plugs used on this meter. This modification creates a loose fit that worsens with use, eventually rendering the clips unreliable.
Many users successfully address this issue by carefully crimping the clip connectors with pliers or replacing them entirely with higher-quality alternatives.
Battery and Power Management
The choice of a 9V battery over AA or AAA cells proves wise, as 9V batteries are less prone to leakage and provide more consistent voltage output. The battery compartment is secured with screws rather than a sliding cover, which some users find less convenient but provides better long-term security.
The auto-shutoff function helps preserve battery life, though users can disable this feature by holding the yellow button during power-on – a useful feature for long-term monitoring applications like automotive parasitic draw testing.
Performance Comparison and Competitive Analysis
Against Premium Brands
When compared to Fluke meters costing 5-10 times more, the TRMS 6000 holds up remarkably well in basic measurement accuracy and functionality. While it lacks the rugged construction, advanced features, and comprehensive safety certifications of premium instruments, it delivers 90% of the functionality for 10% of the price.
Professional users report successfully using these meters as backup instruments or for applications where instrument loss or damage is a concern. The accuracy is sufficient for most troubleshooting applications, though critical measurements should always be verified with calibrated instruments.
Safety Considerations
The meter carries a CAT IV 600V safety rating with 8000V overvoltage protection, providing adequate safety margins for residential and light commercial applications. However, users working with high-energy industrial systems should consider the limitations compared to higher-rated professional instruments.
The probe insulation and meter construction appear adequate for the rated voltages, though the overall package doesn’t inspire the same confidence as meters designed specifically for harsh industrial environments.
Long-Term Reliability and Durability
Build Quality Assessment
User reports spanning several years of ownership generally paint a positive picture of long-term reliability. The meter appears to maintain calibration well over time, with many users reporting consistent accuracy after extended use.
The rotary switch and buttons show good durability, with no widespread reports of failure. The protective boot provides adequate protection for normal use, though it’s unlikely to survive the kind of abuse that industrial-grade meters are designed to handle.
Common Issues and Solutions
The most frequently reported issues include:
- Alligator clip problems: Addressed through careful crimping or replacement
- Short backlight timeout: Manageable through work habit adaptation
- Probe connection tightness: Usually resolves after initial break-in period
- NCV inconsistency: Inherent limitation that requires understanding of proper use
Applications and Use Cases
Automotive Applications
The meter excels in automotive diagnostics, handling everything from battery testing to complex electrical troubleshooting. The fine-tip probes are particularly valuable for automotive fuse testing, while the Min/Max function proves useful for monitoring charging system performance.
Home Electrical Work
For residential electrical projects, the meter provides all necessary functionality with adequate safety margins. The non-contact voltage detection, while imperfect, serves as a useful preliminary check, and the voltage accuracy is more than sufficient for outlet testing and basic troubleshooting.
Electronics and Hobby Use
Electronics enthusiasts will appreciate the capacitance measurement capability and the precision offered by the fine-tip probes. The frequency measurement range makes it suitable for audio and RF applications, though serious RF work may require more specialized instruments.
Professional Backup
Many professional technicians report using these meters as backup instruments or for situations where instrument security is a concern. The performance is adequate for most troubleshooting tasks, though critical measurements should be verified with primary calibrated instruments.
Limitations and Considerations
Measurement Speed
The auto-ranging function, while convenient, does introduce some measurement delay compared to manual-ranging meters. This is most noticeable when taking rapid sequential measurements across different ranges.
Low-End Accuracy
Like most budget instruments, accuracy suffers at the extremes of each range, particularly for very low resistance values and small capacitances. Users should understand these limitations and work within the instrument’s capabilities.
Documentation Quality
The included manual represents a significant weakness, with poor English translation making it difficult to understand all features. Users are better served by online resources and general multimeter tutorials.
Environmental Limitations
While adequate for normal use, the meter lacks the environmental sealing and temperature specifications of professional instruments. Users in harsh environments should consider these limitations.
Value Proposition and Recommendations
Who Should Buy This Meter
This multimeter represents excellent value for:
- DIY enthusiasts and homeowners
- Students learning electronics
- Automotive hobbyists
- Professionals seeking backup instruments
- Anyone needing capacitance measurement capability on a budget
Who Should Consider Alternatives
Professional users in demanding environments, those requiring traceable calibration, or users working with high-energy systems should consider investing in higher-grade instruments despite the significant cost increase.
Tips for Optimal Use
- Fully insert test leads – ensure proper connection for accurate readings
- Replace or modify alligator clips for better reliability
- Understand NCV limitations – always verify with contact measurements
- Use fine-tip probes for improved connectivity and accuracy
- Disable auto-shutoff for long-term monitoring applications
Conclusion
The Auto Ranging Digital Multimeter TRMS 6000 delivers remarkable value in the budget multimeter category. While it cannot match the build quality, advanced features, or comprehensive safety certifications of premium instruments costing 5-10 times more, it provides 90% of the functionality at 10% of the price.
The meter’s strengths – excellent measurement accuracy, comprehensive feature set, quality display, and generous accessory package – far outweigh its limitations for most users. The build quality feels substantial and professional, with thoughtful design touches that enhance usability.
Minor issues like the problematic alligator clips and short backlight timeout are manageable through simple modifications or adaptation of work habits. The documentation quality, while poor, doesn’t significantly impact usability for users familiar with basic multimeter operation.
For DIY enthusiasts, students, automotive hobbyists, and professionals seeking backup instruments, this multimeter represents exceptional value. The inclusion of features like capacitance measurement, frequency counting, and True RMS capability at this price point makes it particularly attractive.
While professional users working in demanding environments or requiring traceable calibration should consider higher-grade alternatives, this meter proves that excellent measurement capability doesn’t require a premium price tag. It stands as a testament to how far budget test equipment has evolved, delivering professional-grade performance at consumer prices.
Overall Rating: 4.5/5 stars – An outstanding value proposition that delivers professional functionality at an exceptional price point, with minor limitations that don’t significantly impact its utility for most applications.
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