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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchThe Metex MS-9150 is a vintage four-in-one bench system combining a frequency counter, function generator, DC power supply and digital multimeter. It can be a space-saving, inexpensive tool for education, audio and general electronics work, but it is not a modern precision or safety-certified test platform. A used example is worth considering only when its individual sections, connectors, mains configuration and documentation have been checked.
What is the Metex MS-9150?
“Metex 9150” normally refers to the Metex MS-9150 Universal System, also described as a multi-measurement station. It was marketed for teaching, servicing, design work and home workshops, putting four basic instruments in one chassis: a frequency counter, function generator, multi-output DC supply and digital multimeter. The product identity and principal specifications are documented by TEquipment.
Search results may also use MS 9150, MS9150 or, in some databases, RO-9150. Related units have appeared under Voltcraft, PeakTech and other distributor labels. Treat those as possible rebadged or related versions, not automatically identical products: compare the model label, rear panel, connector layout, ratings and manual before assuming interchangeability.
A radio-equipment database identifies the manufacturer as Metex Corporation of Seoul, although surviving documentation is largely archival rather than a current manufacturer support catalog (Radiomuseum).
#1 Best Overall
- Versatile Digital Multimeter - Accurately measures AC/DC Current, AC/DC Voltage, Capacitance, Frequency, Duty Cycle, Resistance, Diode, Continuity and Temperature.
- Thoughtful Design - Support Data Hold, Large LCD Backlit Screen, Auto Shut-off and Kickstand make the process of measurements easier. Professional level is reflected in some features include Auto-Ranging capability, and True RMS for measuring both AC Current and Voltage.
- Suitable For Many Occasions - This Multimeter is a golden partner to help to troubleshoot a variety of automotive and household electrical problems safely and accurately.
- Ensure Safety - Double ceramic fuse is anti-burn and protects from overloading，and it will be more secure and reliable； F400mA/600V and F10A/600V explosion-proof ceramic fuse tubes can protect the multimeter effectively.
- Additional Tips - Please take off the cap before using the test leads. Check the manual for more usage information.
- Counter: low-frequency channel A and a separate 50-ohm high-frequency channel B.
- Generator: multiple analog waveforms, sweep and TTL output, specified to 2 MHz.
- Supply: variable 0–30 V output plus fixed 5 V and 15 V outputs.
- DMM: voltage, current, resistance, capacitance, inductance and diode functions, with a reported RS-232 interface.
MS-9150 specifications
These are the strongest surviving MS-9150 figures, principally from the TEquipment specification page. Vintage listings are not fully consistent, so use them as a baseline rather than a guarantee for every chassis.
Frequency counter
| Specification | Reported value |
|---|---|
| Channel A | 1 Hz–20 MHz |
| Channel B | 20 MHz–2.7 GHz |
| Channel A input impedance | 1 MΩ |
| Channel B input impedance | 50 Ω |
| Maximum input voltage | 3 V |
| Channel A sensitivity | 20 mV RMS sine wave or 100 mV peak-to-peak |
| Channel B sensitivity | 40 mV RMS from 20 MHz–1.3 GHz; 70 mV RMS from 1.3–2.7 GHz |
| Time base | Switch-selectable |
That 2.7 GHz figure applies to frequency counting on channel B, not to signal generation, spectrum analysis or RF-power measurement. The 3 V maximum is a counter-input limit and must not be confused with the DMM’s high-voltage ranges.
Function generator
| Specification | Reported value |
|---|---|
| Waveforms | Sine, square, triangle, skewed sine, ramp, pulse and TTL |
| Frequency | 0.2 Hz–2 MHz |
| VCF input | 0–10 V DC |
| Output impedance | Selectable 50 Ω or 600 Ω |
| Output amplitude | 2–20 Vpp open circuit; 1–10 Vpp into 50 Ω |
| Attenuator | −20 dB |
| Sweep time | 20 ms–2 s |
| Sweep mode | Linear or logarithmic |
| Sweep width | More than 100:1 |
Generator amplitude depends on load. A voltage specified open-circuit will be approximately halved by a matched 50-ohm load, so verify settings with the actual termination used in your circuit. The 2 MHz upper limit is a specification, not a promise of laboratory-grade waveform quality at that frequency.
Rank #2
- VERSATILE FUNCTIONALITY: Measures AC/DC voltage up to 600V, 10A AC/DC current, 50MΩ resistance; additional features include continuity, temperature, capacitance, frequency/duty cycle and diode test
- LEAD-ALERT PROTECTION: LEDs on the meter illuminate to indicate proper test lead placement, enhancing accuracy and safety during measurements
- BACKLIT DISPLAY: LCD shows clear readings in low-light conditions for enhanced visibility
- ACCURATE MEASUREMENTS: Auto-ranging and True Root Mean Squared (TRMS) technology provides precise and accurate measurements
- CONVENIENT FEATURES: Test lead holders on the back of the meter, kickstand and optional magnetic hanger (Cat. Nos. 69445 or 69417) for hands-free operation
DC power supply
| Output | Reported rating |
|---|---|
| Variable | 0–30 V, up to 2 A |
| Fixed | 5 V, up to 2 A |
| Fixed | 15 V, up to 1 A |
| Ripple | 1 mV maximum on variable output; 2 mV maximum on fixed outputs |
| Mains options | 110/120 V or 220/240 V AC, 50–60 Hz |
Digital multimeter
| Function | Reported range |
|---|---|
| DC voltage | 400 mV–400 V; 1,000 V range |
| AC voltage | 400 mV–400 V; 750 V range |
| DC and AC current | 40 mA–400 mA; 20 A range |
| Resistance | 400 Ω–4 MΩ; 40 MΩ range |
| Capacitance | 4 nF–400 nF; 4–200 µF ranges |
| Inductance | Reported to approximately 40 mH |
| Other functions | Diode test |
| Display | 3¾-digit |
| Battery | Single 9 V battery |
| Computer interface | RS-232 reported |
Size and weight: conflicting published data
Surviving sources disagree on physical dimensions and mass. TEquipment listings include approximately 14.5 × 6.5 × 12.5 inches and 39 lb, while another line gives approximately 14.5 × 14.0 × 7.0 inches and 37 lb. Radiomuseum lists about 380 × 185 × 370 mm and 20 kg. Do not rely on any one figure for shipping or bench planning; measure the actual chassis.
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Why online specifications conflict
Some pages combine data for the MS-9150, MS-9160 and other related universal systems. A surviving combined specification document distinguishes the MS-9150 generator (0.2 Hz–2 MHz) from the MS-9160 generator (1 Hz–10 MHz), which explains why 10 MHz generator figures are sometimes incorrectly assigned to the 9150 (combined MS-9150/MS-9160 PDF).
Another database entry gives an MS-9150 or related RO-9150 a counter around 5 Hz–1.3 GHz and different supply-current figures (Radiomuseum). Before buying, match the exact front-panel model, rear-panel markings and manual to the serialised unit. Do not silently substitute MS-9160 values for MS-9150 specifications.
Rank #3
- Smart Digital Multimeter: Thanks to its Smart Auto Mode, TESMEN TM-510 4000 counts smart digital multimeter allows you to quickly switch between all measurement tasks, including AC/DC voltage, resistance, and continuity, without selecting a mode or range. It makes measuring work easy, fast, and accurate
- Non-contact: Completely safe Non-Contact Voltage test with a visual and audible alarm; a time-saving and safe feature. You can measure the voltage on the AC wire without having to connect the wire, which makes troubleshooting the line much easier
- Safety Guarantee: CAT II 600V, CE, and RoHS certified. Overload protection measures are used inside the instrument to improve the product's safety performance and maximise users' safety. The outer silicone cover protects the multimeter from damage and potential electric shock
- User Friendly: Supports Data Hold, Automatic Shutdown, Low battery indicator, Backlight display, and Flashlight. All these convenience features make the instrument more than enough for daily use by amateurs, car owners, and homeowners. Easy to use, enjoy endless DIY fun
- About TM-510: In auto mode, if the detected battery voltage is below 0.8V, the device will automatically measure the resistance. Package includes a digital multimeter, 2 test leads, a storage bag, 2 AAA batteries, and a user manual
What it can realistically do
Audio and low-frequency electronics
The generator, counter and supply cover many classroom, audio and analog troubleshooting tasks. You can inject a sine or square wave, power a circuit, observe frequency response and check voltages without filling the bench with four separate boxes.
General servicing and education
Its integrated layout is useful when convenience matters more than resolution. The counter can check the generator’s frequency, while the DMM handles routine voltage, resistance, capacitance and diode measurements.
Basic RF frequency checks
Channel B may be useful for a properly attenuated RF source within its sensitivity and input limits. It is not a GHz signal generator, spectrum analyzer or RF wattmeter. Never connect a transmitter output directly to the counter; use suitable attenuation, coupling and protection.
Rank #4
- Wide Application - The AstroAI M4K0R Multimeter accurately measures AC/DC voltage to 600V, Current to 10A, Resistance to 40MΩ. You can use it for continuity test, diode test, battery test and live wire test. Includes 1.5V, 9V and 12V battery test modes to easily test a wide variety of batteries. Multimeter light turns red for low voltage and green for enough voltage.
- Non-Contact - Fully safe non-contact voltage testing with sound and light alarms. You can detects AC voltage without the use of test leads. Uses NCV function：When the Meter senses a strong AC signal, the red indicator light will turn on and the buzzer will emit a quick beep.
- Thoughtful Design - Support Data Hold, Max, Auto Shut-off, low battery indicator and continuity buzzer. Includes Convenient features like Audial and Visual Alarm, LCD Backlit Screen and Flashlight make it easy to use. Two 1.5V AAA batteries are included in the package.
- Ensures Safety - Double ceramic fuse is anti-burn and protects from overloading. The multimeter has passed overvoltage category III 600V safety standards. The silicone cover is able to protect the multimeter from failing damage and prevent electric shocks.
- Additional Tips - This Multimeter is designed to troubleshoot a variety of automotive and household electrical problems safely and accurately. It’s a suitable tool if you want to do some household or commercial improvements whether DIYers or Hobbyists.
What it does not replace
- A modern high-count precision DMM.
- An arbitrary waveform generator with contemporary modulation and waveform fidelity.
- A regulated, well-documented modern supply for safety-critical or production work.
- A spectrum analyzer, RF power meter or transmitter test load.
- Modern USB software and driver support.
A hobbyist teardown reports amplitude variation, questionable waveform quality near the generator’s upper range and less-than-ideal supply stability. Those are individual observations, not certified performance tests (Majorres report).
Used-unit inspection and testing
Before you pay
- Request photographs of the front, rear, model label, mains selector and every connector.
- Confirm that the 9 V battery compartment and contacts are intact.
- Ask whether all four sections work, not merely whether the display lights.
- Check for the power cord, meter leads, BNC cable, RS-232 cable, software and manual.
- Ask for calibration or repair history and any known connector or fuse damage.
An ended eBay listing shows why “powers on” is weak evidence: an MS-9150 sold for US$119.99 on February 21, 2026, after being tested only for power-on, with a damaged or missing connector reported (eBay listing). That is one transaction, not a market average.
Power-supply checks
- With no load, turn the variable output smoothly from zero upward and verify the 5 V and 15 V outputs.
- Apply an appropriate test load and check voltage regulation, current limiting and ripple.
- Watch for excessive heat, hum, smell, fan noise or unstable readings.
Function-generator checks
- Test sine, square and triangle waves at low, middle and high settings.
- Measure amplitude both open-circuit and with a 50-ohm load.
- Verify 50 Ω/600 Ω selection, attenuation, sweep and TTL output.
- Compare the displayed frequency with a trusted counter or oscilloscope at several points.
Counter checks
- Use a known low-frequency reference on channel A.
- Check a mid-band signal and observe gate-time behavior.
- Use a properly attenuated source on channel B; never exceed its 3 V maximum.
- Reject intermittent, erratic or wildly fluctuating readings until the input and time base are serviced.
DMM checks
- Compare DC and AC voltage with a trusted modern meter.
- Test resistance and capacitance using known components, then verify diode test.
- Test current only with a protected source, correct fuse and correct lead position.
- If logging matters, verify that RS-232 output and the required cable or software are actually available.
Safety considerations
This is mains-powered vintage equipment. Inspect the cord, plug, fuse, insulation and enclosure before energising it, and confirm the mains-voltage selector where fitted. Do not infer modern CAT safety ratings from the DMM’s printed 1,000 V DC or 750 V AC ranges.
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Best Value
- Pro-Grade Safety & Protection: Engineered for peace of mind. The FS899L meets strict CAT.III 1000V and CAT.IV 600V safety standards, featuring dual ceramic fuses and full-range overload protection. Whether you're troubleshooting an industrial panel or a car battery, you’re shielded from surges and accidental shorts.
- Precision You Can Count On: Stop guessing and start measuring. Powered by True RMS technology and a 6000-count resolution, this meter delivers lab-grade accuracy for AC/DC voltage, current, resistance, and capacitance. It’s the reliable precision a pro needs to diagnose complex electrical issues with total confidence.
- Vibrant Color Display & Worklight: Forget squinting at blurry numbers. The massive 4.8-inch high-definition color screen offers crystal-clear readings even in direct sunlight or pitch-black basements. Paired with a built-in flashlight and Data Hold, it turns cramped, dimly lit workspaces into manageable jobs.
- The Ultimate All-in-One Tool: From HVAC temperature checks to NCV (Non-Contact Voltage) detection, this tool handles it all. It’s a versatile powerhouse that measures continuity, frequency, and live wires, making it the go-to diagnostic companion for household repairs, shop work, and industrial maintenance.
- USB-C Power: Always Ready: Stop hunting for spare batteries. The modern USB-C rechargeable design offers a fast 2-hour charge for a full day of continuous field use. It’s a cost-effective, eco-friendly solution that ensures your most important tool is always powered up and ready for the next task.
- The DMM’s 20 A input can create a dangerous short if connected across a voltage source.
- The counter input is limited to 3 V, even though the separate DMM accepts higher voltages.
- Do not use damaged leads, cracked insulation or corroded connectors.
- An isolation transformer, where appropriate, does not replace safe probing practice.
- Unknown calibration and aged input protection make high-energy measurements especially risky.
Manuals, schematics, software and accessories
An archive at Schaltungen.at references an MS-9150 operating manual, technical data and circuit diagrams for the supply, generator, counter, multimeter and display. It is an archive rather than a current official support portal; download files cautiously and scan them before opening.
A separate technical-data document covering the MS-9150 and related MS-9160 is available from ES Thailand. Keep operating instructions, specification sheets, schematics and software distinct: a manual explains controls, a schematic supports repair, and an old RS-232 program may not run on a current operating system.
Is the MS-9150 worth buying?
Buy one when you want four basic bench functions in one compact chassis, work mainly on low-frequency or general electronics, can test or repair vintage equipment, and the seller offers a complete unit at a price that leaves room for calibration and repairs.
Avoid it when you need certified modern safety, precision measurements, clean high-frequency waveform generation, current operating-system support, or dependable operation straight from the box. A failure in one section can leave you with a large, difficult-to-replace chassis rather than one failed inexpensive instrument.
The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Historical Hungarian catalog prices of 92,000 and 117,900 forints plus VAT are period regional prices, not evidence of current value (issue 63; issue 62). A TEquipment page has displayed a US$499 list price, but that legacy listing is not proof of current stock, calibration, warranty or mains version; confirm those details directly (TEquipment).
Alternatives to a vintage universal system
| Approach | Main strengths | Main trade-offs |
|---|---|---|
| MS-9150 | Four functions, compact bench footprint, potentially low used cost | Age, unknown calibration, mixed documentation, obsolete software and safety uncertainty |
| Separate modern instruments | Better displays, support, replacement flexibility and clearer current specifications | More cost, space and cables |
| Modern integrated system | Retains the one-box concept with contemporary support | Usually higher purchase cost; exact capabilities vary |
| Dedicated RF equipment | Proper tools for GHz frequency, power or spectrum work | Does not replace a general-purpose bench supply and DMM |
Voltcraft, PeakTech, Tenma and other branded systems may be worth investigating as related vintage options. Confirm the generator and counter ranges, supply ratings, mains version, connectors and available documentation rather than assuming a visual match is electrically identical. Related branding and model confusion are discussed in surviving listings and a Mikrocontroller.net discussion.
Quick Recap
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