ATUOTIN ESR DCR Capacitor Tester – In-Circuit Meter with Leads
ATUOTIN ESR DCR Capacitor Tester – In-Circuit Meter with Leads
ATUOTIN ESR DCR Capacitor Tester – Precision In-Circuit Capacitance Meter
The ATUOTIN ESR DCR Tester is a professional-grade, handheld electrical testing meter designed for electronics technicians, hobbyists, and engineers who demand accurate, reliable capacitor measurements. With high-precision ESR and DCR readings, wide frequency support up to 100 kHz, and smart auto-shutdown functionality, this compact meter is an essential tool for your electronics workbench.
Made in Mainland China.
Key Features
- High-Precision Measurement: Accurately measures Equivalent Series Resistance (ESR) and DC Resistance (DCR) of capacitors across a 0–25Ω range, split into two auto-switching sub-ranges: 0–5Ω (resolution 0.01Ω) and 5–25Ω (resolution 0.1Ω).
- 100 kHz Industry-Standard Frequency: Operates at the ESR measurement industry-standard frequency of 100 kHz for trustworthy, repeatable results.
- Online & Offline Measurement: Test capacitors both in-circuit and out-of-circuit with a safe 5 mA measuring current — no need to desolder components for quick diagnostics.
- Synchronous Short-Circuit Detection: Uses synchronous detection to capture the true ESR value, eliminating parasitic interference for unmatched accuracy.
- Measurement Accuracy: 0–5Ω range: ±1.5% ±0.01Ω | 5–25Ω range: ±1.5% ±0.1Ω.
- Automatic Zero Adjustment: Auto-zeroes on power-on and when switching between ESR and DCR modes. The LCD simultaneously displays the ESR value and probe compensation value for easy real-time zero adjustment.
- Overvoltage Input Protection: Built-in protection at the input terminals safeguards the meter and your components from accidental voltage spikes.
- Smart Auto-Shutdown: Automatically powers off after approximately 5 minutes of inactivity to conserve battery life. Low-voltage warning appears on the LCD before auto-shutdown.
- Rechargeable Lithium Battery: Powered by a 3.7V 14500 lithium rechargeable battery (sold separately). Supports charge-and-use simultaneously via DC 5–6V input. Charging time: 2–3 hours. Red LED = charging; Green LED = fully charged.
- User-Friendly Interface: Simple ON/OFF/ZERO button for mode switching between ESR and DCR. Large, clear LCD display for effortless reading in any lighting.
- Versatile & Compact: Compact dimensions of 125 × 80 × 32 mm (4.92 × 3.15 × 1.26 in) make it easy to carry and use in tight spaces.
Specifications
| Measuring Range | 0–25Ω (auto-switch: 0–5Ω / 5–25Ω) |
| Resolution | 0.01Ω (0–5Ω range) / 0.1Ω (5–25Ω range) |
| Accuracy | ±1.5% ±0.01Ω / ±1.5% ±0.1Ω |
| Measuring Frequency | 100 kHz |
| Measuring Current | 5 mA |
| Battery | 3.7V 14500 lithium rechargeable (not included) |
| Charging Input | DC 5–6V | Charge time: 2–3 hours |
| Max Working Current | ~60 mA at 3.7V |
| Dimensions | 125 × 80 × 32 mm / 4.92 × 3.15 × 1.26 in |
| Country of Origin | Mainland China |
What's in the Box
- 1 × ESR DCR Tester
- 2 × Test Pens
- 2 × Test Clips
- 1 × USB Charging Cable
Note: Battery is NOT included. Please purchase a compatible 3.7V 14500 lithium battery separately.
Safety & Standards
For guidance on safe use of electrical testing equipment in the workplace, refer to the OSHA Electrical Safety guidelines. For standards related to electronic test & measurement instruments, visit NIST Measurement & Instrumentation resources.
Note: Due to variations in monitor settings and lighting, the actual product color may differ slightly from images. Please allow ±1–2 cm deviation due to manual measurement.
Frequently Asked Questions
Q: Can I use this ESR DCR tester to measure capacitors while they are still in the circuit?
A: Yes! The ATUOTIN ESR DCR Tester supports both online (in-circuit) and offline (out-of-circuit) measurements. Its low 5 mA measuring current is safe for testing capacitors without desoldering them from the board, saving you significant time during diagnostics.
Q: Does the ESR capacitor tester come with a battery?
A: No, the tester does not include a battery. You will need a 3.7V 14500 lithium rechargeable battery (purchased separately). The unit can be used while charging via a DC 5–6V supply, and the built-in indicator light turns green when fully charged.
Q: How does the auto-zero adjustment work on this capacitance meter?
A: The tester automatically performs zero adjustment when powered on and again each time you switch between ESR and DCR modes. The LCD simultaneously shows the ESR reading and the probe compensation value, allowing you to fine-tune zero manually at any time for maximum accuracy.
Q: What is the measuring range and accuracy of this ESR meter?
A: The meter covers 0–25Ω total, automatically switching between two sub-ranges. The 0–5Ω range offers 0.01Ω resolution with ±1.5% ±0.01Ω accuracy, while the 5–25Ω range provides 0.1Ω resolution with ±1.5% ±0.1Ω accuracy — delivering high precision across a broad spectrum of capacitor types.