Description
Product Overview
The Peak ESR70 is a precision instrument designed to measure both capacitance and equivalent series resistance (ESR) across a broad spectrum of capacitor types. Engineered by Peak Electronic Design Limited, this handheld meter combines rugged construction with high‑resolution electronics to deliver reliable data in demanding environments. Its measurement range spans from 1 µF to 22 000 µF, covering motor capacitors, smoothing capacitors, electrolytic, polypropylene, and virtually any dielectric material. The device features an enhanced dynamic range of 0 Ω to 40 Ω, with ESR resolution as fine as 0.01 Ω, allowing users to detect minute changes that can indicate early failure. A built‑in 12 V battery provides up to several hours of continuous operation, making the ESR70 truly portable. The front panel displays clear numeric readouts, while audible alerts signal predefined ESR thresholds, helping technicians respond quickly to abnormal conditions. The meter’s compact dimensions—approximately 0.04 × 0.04 × 0.04 inches—and lightweight design (3.39 oz) ensure it can be carried in a tool belt or pocket without adding bulk.
![[Product front view showing all components]](https://www.runninglife.store/wp-content/uploads/2026/06/550faa00be154d95b048688654be4d84.jpg)
Usage
Designed for both laboratory and field applications, the ESR70 excels in environments where accurate capacitor diagnostics are critical. In a manufacturing setting, quality‑control engineers use the meter to verify that newly produced capacitors meet design specifications before assembly. Service technicians in HVAC, refrigeration, and industrial motor maintenance rely on the ESR70 to quickly assess motor start and run capacitors, identifying high‑ESR conditions that cause overheating or reduced efficiency. The audible alert system is especially useful when working in noisy workshops, as the device can emit distinct tones for low, medium, and high ESR levels, allowing the user to keep both hands free for probe placement. Portable testing is further facilitated by the included 12 V battery, which eliminates the need for external power sources during on‑site inspections. The meter’s intuitive interface requires only a few button presses to switch between capacitance and ESR modes, making it accessible to both seasoned professionals and newcomers to electronic diagnostics.
Why Choose Us
Peak Electronic Design Limited has a reputation for delivering high‑quality measurement tools that combine durability with precision. The ESR70 benefits from rigorous quality‑assurance processes, including calibrated component testing and environmental stress screening, ensuring consistent performance across thousands of units. Unlike many competing meters that offer limited ESR resolution, the ESR70’s 0.01 Ω granularity provides a decisive advantage when troubleshooting high‑performance equipment where even small resistance variations can impact overall system reliability. The device is built to withstand drops, vibration, and exposure to typical workshop contaminants, thanks to its sealed housing and reinforced keypad. In addition, Peak offers comprehensive after‑sales support, including a one‑year warranty, access to online firmware updates, and a dedicated technical helpline staffed by engineers familiar with capacitor diagnostics. Customers also receive a detailed user manual that includes step‑by‑step procedures for common testing scenarios, calibration tips, and safety guidelines, helping them get the most out of their investment.
Key Features
- High‑resolution ESR measurement down to 0.01 Ω for precise fault detection.
- Wide capacitance range (1 µF‑22 000 µF) covering all common capacitor types.
- Audible alerts that differentiate low, medium, and high ESR levels for hands‑free operation.
- Portable 12 V battery power enabling field testing without external power.
- Robust construction with sealed housing and a one‑year warranty plus dedicated technical support.
FAQ
What types of capacitors can the ESR70 test?
The ESR70 can accurately measure motor start and run capacitors, smoothing capacitors, electrolytic capacitors, polypropylene capacitors, and any other dielectric type within the 1 µF to 22 000 µF range.
How does the audible alert system work?
The meter emits three distinct tones: a low‑pitch beep for ESR values below a user‑defined threshold, a medium‑pitch beep for moderate ESR levels, and a high‑pitch beep for high ESR readings that may indicate imminent failure. Users can customize the threshold values in the settings menu.
Can the ESR70 be used for continuous monitoring?
While the ESR70 is primarily designed for spot‑checking and diagnostic measurements, its battery life supports several hours of continuous operation. For long‑term monitoring, users should consider a dedicated data‑logging solution.
Is calibration required?
The ESR70 is factory‑calibrated and meets industry accuracy standards out of the box. However, for critical applications, periodic verification against a known reference capacitor is recommended to maintain optimal performance.
What warranty and support does Peak provide?
Peak offers a one‑year limited warranty covering manufacturing defects, along with access to online resources, firmware updates, and a technical support hotline staffed by experienced engineers.





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