Test & Measurement Power Supplies
Certified AC-DC power adapters for Digital Multimeters and Clamp Meters
Quankang designs and manufactures test-and-measurement power supplies for OEMs and instrument brands worldwide. For 36 years, we have built stable, low-noise AC-DC power adapters for equipment that depends on accurate readings and dependable electrical performance, from handheld digital multimeters used in field service to clamp meters relied on for inspection, maintenance, and industrial testing.
Our power solutions are engineered for the demands of precision measurement instruments, with stable voltage output, ultra-low ripple and noise, strong EMC performance, and global safety certifications. With in-house design, testing, and production under one roof, plus an EMC laboratory that helps identify interference risks early, we help customers move from development to market faster and with more confidence.
*Share your specifications. Our engineering team typically responds within one business day.
Why Test & Measurement Devices Demand Reliable Power
The power supply is the primary barrier between mains voltage and the patient. Unlike consumer or IT-grade adapters, a medical power supply must hold that barrier under both normal operation and single-fault conditions — reliably, for years of daily use. Getting this wrong has direct consequences for patient safety, device performance, and regulatory approval.
Six engineering factors separate a medical-grade power supply from a standard adapter — and each one has direct consequences for your device.
Six Engineering Requirements Define The Difference:
Applications
Test & Measurement Power Supply Solutions by Application
Different test and measurement instruments place different demands on the power supply. Explore our application pages for recommended models, typical power requirements, and design considerations for digital multimeters and clamp meters.
Applications
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Digital Multimeter (DMM)
Certified AC-DC power adapters for portable handheld, bench-top, and industrial digital multimeters — engineered for ultra-low ripple, stable output, and dependable reading accuracy across laboratory, field, and calibration use.
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Clamp Meter
Certified AC-DC power adapters for handheld, industrial, and high-precision clamp meters — built for strong EMC performance, stable voltage delivery, and reliable operation in complex electrical testing environments.
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Selection Guide
Power Supply Selection Guide
Output voltage is only one part of power supply selection for test and measurement instruments. Evaluating ripple performance, EMC behavior, protection features, and operating conditions early in development can help reduce redesign risk and support more reliable long-term measurement performance.
| Device Type | Typical Voltage | Key Power Requirement | Recommended Protection |
|---|---|---|---|
| Digital Multimeter (DMM) | 5V / 9V / 12V | Ultra-low ripple, stable output | Over-voltage, over-current, thermal |
| Clamp Meter | 5V / 9V / 12V | Strong EMC performance, stable voltage | Over-voltage, short-circuit, thermal |
Key Features
Key Features of Quankang Test & Measurement Power Supplies
Certified Safety and EMC Compliance
Designed to meet IEC/EN 62368-1 safety requirements and support low-interference operation in measurement environments.
Stable Voltage Output
Well-regulated DC output supports accurate readings, reliable signal processing, and consistent instrument performance.
Ultra-Low Ripple and Noise
Clean power helps reduce interference and protects sensitive analog and digital measurement circuits.
Measurement-Grade Reliability
Engineered for repeated testing, daily inspection work, and dependable long-term measurement performance.
Built-In Protection
Includes over-voltage, over-current, short-circuit, and thermal protection for safe long-term operation.
Flexible Output Options
Available in common output voltages such as 5V, 9V, and 12V.
Global Safety Approvals
Supports international market access with certifications including CE, UL, FCC, CB, PSE, and UKCA.
OEM/ODM Customization
Custom output, plug type, cable length, enclosure, labeling, and branding are available.
Environmental Compliance
RoHS and REACH compliant materials support global environmental requirements.
Proven Engineering Experience
Backed by 36 years of manufacturing expertise, 212 active patents, and customers in more than 50 countries.
Frequently Asked Questions
What standards are most important for test and measurement power supplies?
Why can’t a standard consumer adapter be used for test instruments?
Which test and measurement devices commonly use external AC-DC power adapters?
Can Quankang customize a power supply for my instrument?
Are your power supplies suitable for laboratory and field use?
Do your power supplies support global market requirements?
Power Your Next Measurement Instrument with Confidence
Whether you are developing a new digital multimeter, refining a clamp meter platform, or expanding a broader test equipment line, the right power supply improves measurement accuracy, simplifies compliance, and supports long-term field performance. Share your voltage, output, certification, and form factor requirements, and our engineers will recommend a qualified model or develop a tailored solution for your application.
Start Your Test & Measurement Power Project
Send us your voltage, output, certification, and form factor requirements today. An engineer will follow up with recommended models or customization options, typically within one business day.