DC Voltage Data Loggers & Recorders for Long-Term Voltage Monitoring

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Explore our range of precision voltage data loggers, engineered to deliver dependable, long‑term DC voltage measurement and logging across a broad spectrum of applications. Ideal for industrial testing, energy audits, research labs and regulated environments, our solutions deliver accurate insights you can trust.
Our range focuses on DC voltage data loggers and recorders — from compact USB loggers to wireless and multi-channel systems. For combined voltage and current logging and power/energy data, see our multi-parameter loggers below; for AC mains work, talk to our team about the right clamp or AC-capable option.

What is a Voltage Data Logger?

A voltage data logger is a compact electronic instrument that measures and records voltage levels over time. By connecting the logger directly to a circuit, battery pack, solar panel, or power supply, you can build a complete time-stamped record of voltage fluctuations — data that is essential for diagnostics, compliance testing, and preventive maintenance.
DC voltage data loggers are most commonly used for monitoring battery health and discharge cycles, recording the output of solar photovoltaic systems, logging signals process sensors, and validating power supply performance in industrial environments.

Explore our range of precision voltage data loggers, engineered to deliver...

  • MadgeTech Volt101A is a compact, low-level DC voltage data logger, available in four ranges: 2.5VDC, 15VDC, 30VDC and ±160mVDC.

    MadgeTech Volt101A | Voltage Data Logger

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    Compact, low level, DC voltage data logger.

    $ 586.61 Ex. GST
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  • MadgeTech RFVolt2000A wireless DC voltage data logger

    MadgeTech RFVolt2000A | Wireless DC Voltage Data Logger

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    Wireless voltage data logger, Available in 4 Meas…

    $ 882.50 Ex. GST
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  • The MadgeTech VoltX-16 is a 16-channel DC voltage data logger and available in three voltage ranges: 160 mV, 3.2 V, and 32 V.

    MadgeTech VoltX | 4/8/12/16-Channel DC Voltage Data Logger

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    4, 8, 12, and 16-channel DC voltage data loggers….

    Price range: $ 1,912.50 through $ 4,711.61 Ex. GST
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  • COMET U0541 Data logger is designed to record 2 voltage inputs and 2 x Pt1000 temperature inputs.

    COMET U0541 | 4-Channel Voltage & Temperature Data Logger (2x 0-10V + 2x Pt1000)

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    Data logger for 2 voltage inputs 0-10V and 2 exte…

    $ 703.50 Ex. GST
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  • COMET U5841 4-channel data logger for 3 x 0-10V voltage inputs and 1 x two-state input.

    COMET U5841 | 4-Channel Voltage Data Logger (3x 0-10V + 1x Two-State Input)

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    Data logger for 3 voltage inputs 0-10V and 1 two-…

    $ 703.50 Ex. GST
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  • COMET U5841G 4G datalogger is designed to record 3 voltage inputs and 1 binary input.

    COMET U5841G | 4-Channel Voltage 4G Data Logger (3x 0-10V + 1x Two-State Input)

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    Data logger for 3 voltage inputs 0-10V and 1 two-…

    $ 1,569.50 Ex. GST
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  • EFENTO 0-10V sensor interface NB-IoT

    EFENTO 0-10V NB-IoT Sensor Interface

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    $ 345.91 Ex. GST
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  • Efento Bluetooth 0-10 V sensor interface

    EFENTO Bluetooth 0-10V Sensor Interface

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    $ 237.05 Ex. GST
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  • COMET MS6D 16 channel data logger.

    COMET MS6D | Ethernet Monitoring System — 16-Channel

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    Sixteen Channel Data Logger with Alarms

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  • COMET MS6R rack mount Sixteen Channel Data Logger with Alarms.

    COMET MS6R | Ethernet Monitoring System -16-Channels

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    Sixteen Channel Data Logger with Alarms

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  • COMET MS6-Rack Ethernet Monitoring System with 16-Channels, 19" Rack-Mount.

    COMET MS6-Rack | Ethernet Monitoring System – 16-Channel, 19″ Rack-Mount

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    Sixteen Channel Data Logger, Rack mount with Alar…

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  • COMET MS55D Sixteen Channel Data Logger with Alarms and configurable inputs and outputs.

    COMET MS55D | Ethernet Monitoring System — 16-Channel

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    Sixteen Channel Data Logger with Alarms

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  • COMET M1300 multilogger with 4 channels.

    COMET M1300 | Ethernet Current, Voltage & Pulse Data Logger

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    Ethernet Multilogger – universal datalogger…

    $ 2,145.00 Ex. GST
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  • COMET M1320 multilogger with 2 MiniDIN and 2 Terminals.

    COMET M1320 | Ethernet Multi-Channel Data Logger

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    Multilogger – universal 4 channel thermomet…

    $ 2,145.00 Ex. GST
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  • COMET M1322 Ethernet multi-logger to monitor temperature, humidity and CO2

    COMET M1322 | Ethernet Multi-Channel Data Logger with CO2

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    Ethernet Multilogger – thermo-hygro-CO2

    $ 2,509.50 Ex. GST
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  • COMET M1323 multi-logger to monitor temperature, humidity, pressure and CO2.

    COMET M1323 | Ethernet Multi-Channel Data Logger with Barometric Pressure & CO2

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    Multilogger – thermo-hygro-CO2-barom…

    $ 2,695.00 Ex. GST
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  • Engineers use a voltage data logger (or voltage recorder) to capture battery and solar bank voltage, monitor mains/supply quality, validate DC power supplies and sensor signals, and record 3-phase and multi-channel installations — building a time-stamped record you can download to CSV or PDF.

    Choose by voltage range (millivolts to high-voltage inputs), channel count (single to 16-channel), and connectivity (USB download, Bluetooth, NB-IoT or wireless telemetry). We stock MadgeTech (Volt101A, VoltX, RFVolt2000A wireless), COMET (U5841 four-channel, M1300-series multi-loggers, MS-series monitoring systems) and EFENTO 0–10 V interfaces — with local stock, calibration and support across Australia.

    DC Voltage Data Loggers

    Our core range is built around DC voltage data loggers that record supply rails, battery banks, sensor outputs and control signals over time. Compact USB models like the MadgeTech Volt101A suit single-channel work, while the multi-channel VoltX and COMET U5841 / U0541 capture several 0–10 V inputs at once. Ranges run from millivolts up to higher DC inputs, with sampling from one second to several minutes. Deploy the logger, then download a time-stamped record to CSV or PDF for analysis.

    Voltage & Current Loggers

    Need power as well as voltage? A voltage and current logger records both parameters together, so you can derive watts and watt-hours — essential for energy audits, solar arrays and battery systems. Multi-channel COMET loggers and monitoring systems can capture voltage alongside current and other analogue inputs on a single system, and they pair naturally with the units on our Current Data Loggers page. Choose the channel count and input mix your installation needs.

    Why Choose Our Voltage Data Loggers?

    • High accuracy & resolution – Precise readings down to microvolt resolutions with stable calibrated performance.

    • Flexible recording modes – Choose between configurable reading intervals (from 4 Hz to once per day) and data logging modes (cyclic or non‑cyclic).

    • Scalable options – Single‑channel compact designs, high‑channel VoltX systems for simultaneous multi‑point logging, wireless or GSM connectivity.

    • Software & cloud ready – Full MadgeTech 4 and COMET Cloud integration for easy configuration, data access, alarms, and analytics.

    • Robust and compliant – Rugged enclosures rated for typical industrial ambient conditions, with support for ISO‑certified calibration.

    Our voltage loggers are trusted across regulated industries including medical and pharmaceutical, food and beverage, oil and gas, mining, and transport.


    Need assistance selecting the right model?
    Let us help you with channel count, voltage range, wireless needs, alarm settings, or software integration—to ensure your application is fully supported. Please call us on 1300 662 720 to speak with one of our Engineers.

    Frequently Asked Questions

    What is a voltage data logger?

    A voltage data logger is a device that automatically measures and records electrical voltage at set intervals and stores the readings in memory. You deploy it, then download a time-stamped graph of voltage over hours, days or months — ideal for battery and solar monitoring, supply-quality checks, and validating equipment.

    What is the difference between a voltage data logger and a voltage recorder?

    They are essentially the same thing — 'voltage recorder' is the traditional term and 'voltage data logger' the modern one. Both continuously record voltage unattended, unlike a multimeter which only shows an instantaneous reading.

    Do your voltage data loggers measure AC or DC voltage?

    Our core range is built for DC voltage (battery, solar, DC supplies and sensor signals), with ranges from millivolts up to high-voltage inputs. If you need to log AC mains voltage, contact our team — we can advise on AC-capable or clamp-based options to suit the job.

    Can one logger record voltage and current together?

    Yes. Several models log voltage and current simultaneously so you can calculate power (watts) and energy (watt-hours) — useful for energy audits and solar/battery systems. Multi-channel COMET loggers and MadgeTech multi-parameter units cover this.

    How do I choose the right voltage data logger?

    Match four things: (1) voltage range and AC vs DC; (2) number of channels (single up to 16); (3) connectivity — USB download, Bluetooth, NB-IoT or wireless telemetry; and (4) environment (portable, rugged or rack-mounted). Our Australian team can recommend a model for your application.

    Do they connect via USB or wirelessly?

    Both. USB loggers (e.g. MadgeTech Volt101A) are downloaded to a PC; wireless models (MadgeTech RFVolt2000A, COMET IoT and EFENTO NB-IoT/Bluetooth interfaces) stream readings to software or the cloud for remote monitoring.

    What software comes with the logger?

    Every logger includes configuration and download software, and many offer cloud or app access. You set the sampling rate and range, deploy the logger, then export a time-stamped report to CSV or PDF, or view it in your monitoring platform.

    Do you stock and support voltage data loggers in Australia?

    Yes. Pacific Sensor Technologies holds local stock, ships Australia-wide, and provides local calibration, configuration help and technical support — so advice and service don't depend on overseas turnaround.