Choosing a voltage and current data logger helps engineers and technicians monitor electrical systems, diagnose faults, and verify performance over time. The following selection focuses on reliability, true RMS measurements, sampling versatility, and ease of data retrieval. Use the quick-reference table below to compare key products at a glance.
| Product | Brand | Key Capability |
|---|---|---|
| Extech DL150 True RMS | Extech | AC voltage, current, USB download |
| OWON CMS061 3-in-1 | OWON | Clamp meter, oscilloscope, data logger with Bluetooth |
| Lascar EL-USB-3 | Lascar Electronics | USB voltage logger with long battery life |
| Supco DVCV | Supco | Voltage, current, watts with graphical display |
| AEMC-212605 L261 | AEMC | Single-channel voltage logger, true RMS |
Extech DL150 True RMS Voltage/Current Datalogger
The Extech DL150 offers true RMS measurements for AC voltage up to 600V and current up to 200A. It can log up to 100,000 readings with a programmable sample rate from 1 second to 24 hours. Data can be downloaded via USB for software analysis or export to a spreadsheet, enabling efficient trend review and reporting.
OWON CMS061 3-in-1 Bluetooth Clamp Meter
This 3-in-1 device combines a 600A AC/DC True RMS clamp meter, oscilloscope, and data logger. It supports real-time waveform analysis for precise troubleshooting of motors and power supplies. Smart Bluetooth connectivity with the i-Meter app enables wireless data logging, trend analysis, and remote monitoring.
Lascar EL-USB-3 USB Voltage Data Logger
The Lascar EL-USB-3 is a compact USB voltage data logger with a focus on long-running battery life and straightforward logging. It records voltage over time with a simple interface and ships with software options for data review and export, suitable for routine monitoring tasks.
Supco DVCV True RMS Data Logger
The Supco DVCV data logger provides graphical displays of current, voltage, watts, and a logging summary. It includes an alarm LED and software alarms for over- and under-range conditions, helping users quickly identify power quality issues. An 18-month warranty supports long-term usage.
AEMC-212605 L261 Single-Channel Logger
The AEMC L261 is a single-channel logger designed for voltage measurement with true RMS capabilities. It includes LED indicators to display logger status and supports monitoring, troubleshooting, and verification of electrical systems up to 600V AC/DC.
Buying Guide: Key Considerations For Voltage And Current Data Loggers
- Measurement range and true RMS: Ensure the device supports the voltage and current ranges you work with, and choose true RMS models for accurate readings with non-sinusoidal waveforms.
- Sampling rate and memory: Consider how often you need to sample and how many readings the logger can store. Higher sampling rates and larger memory are better for transient events and long-term studies.
- Connectivity and data retrieval: USB is common for direct PC downloads; Bluetooth or Wi‑Fi-enabled loggers support wireless monitoring and remote access, which can save time in fieldwork.
- Ease of use and software: Look for intuitive software that exports data to CSV or Excel, provides plotting, and supports alarms or thresholds for quick diagnostics.
- Form factor and installation: Clamp meters and split-core sensors simplify installation on existing wiring without disconnecting circuits. Consider warranted durability for field use.
- Power and battery life: If the logger is not USB-powered, check battery life to minimize maintenance. Some units use long-life internal batteries or rechargeable packs.
- Warranty and service: A longer warranty and readily available support help ensure long-term reliability in professional settings.
- Safety certifications: For electrical work, verify compatibility with local safety standards and the environment you’ll operate in (dust, moisture, temperature).