Didactum Alternating Current Sensor for Voltage Monitoring

Function and Purpose

The Didactum AC Sensor has been specifically developed for precise monitoring of mains voltages in critical environments. It makes a significant contribution to the operational safety and reliability of technical infrastructures. In data centers, telecommunication systems, or industrial control installations, undetected voltage fluctuations can have serious consequences — from component failures to data loss. Through continuous measurement, the sensor ensures stable, monitored power conditions and enables a rapid response to deviations.

The device measures AC voltage in the range of 0 to 246 V AC and provides accurate real-time measurement data. It reliably detects electrical anomalies such as overvoltage and undervoltage, transmitting this information directly to the connected Didactum monitoring system. When predefined thresholds are exceeded, the system can automatically trigger an alarm notification via email, SNMP trap, or SMS. This allows potential failure risks to be detected early and preventive measures to be initiated.

The sensor is designed for international use and is supplied with interchangeable plug types. The delivery includes adapter plugs for Europe, the USA, China, Australia, and South Africa. Thanks to this versatility, the sensor can be used globally in various power networks. It is ideal for power outlets or power strips with standardized IEC C14 connectors.

The sensor is connected to a Didactum monitoring unit via an analog port (A1…A8). After plugging it in, it is automatically detected and integrated without any additional configuration — a true plug-and-play solution. The precise measurement data are visualized and archived via the web-based user interface of the Didactum monitoring systems, and can be used for trend analysis or automation of control processes.

To extend the monitoring range, the maximum number of sensors and the distance to the main monitoring unit can be increased using a sensor expansion unit. This flexibility enables scalable solutions — from simple voltage monitoring of individual devices to fully integrated energy monitoring systems for complex infrastructures.

Thus, the Didactum AC Sensor provides an efficient combination of accuracy, reliability, and ease of integration — an indispensable tool for proactive energy management in modern IT and industrial applications.

Applications

These application examples show how the AC Sensor assists in monitoring AC voltage to ensure the stability and safety of equipment across various sectors.

Power monitoring in data centers: Measure and monitor the AC voltage supplied to server racks and other critical equipment to ensure reliable power delivery and prevent device damage caused by voltage fluctuations.
Telecommunication stations: Use the sensor to monitor AC power supply at base stations to maintain consistent power and avoid network outages resulting from voltage issues.
Industrial power systems: Monitor voltage in industrial automation systems where a stable AC power supply is essential for proper operation of machines and control systems.
UPS systems (Uninterruptible Power Supply): Integrate the sensor into UPS systems to monitor incoming voltage and prevent equipment failure due to under-voltage or over-voltage conditions.
Electrical control panels: Install the sensor in electrical distribution panels to measure and monitor voltage supply to critical systems, ensuring safety and regulatory compliance.
Building Management Systems (BMS): Integrate the sensor into a BMS to monitor the AC voltage delivered to various systems within a facility and to detect and correct power losses at an early stage.

Dimensions and technical data:

Technical Specifications:

Sensor type: Analog sensor
Accuracy: 1%
Dimensions: 63 × 40 × 67 mm (Length × Width × Height)
Package weight: 125 g
Voltage measurement range: 0 to 246 V
Input: Power plug – EU (Europe), US (United States), AU (Australia and China), SA (South Africa), UK (United Kingdom)
Output: USB to RJ11 6P4C
Power consumption: 60 mW
Operating temperature: -10 °C to +80 °C
Mounting options: Plug-in mount – EU, US, AU, SA, UK
Maximum distance to unit: 100 m

Connecting the sensor:

Sensor Installation

Connect the sensor to one of the “A1…A8 analog ports” of the Didactum monitoring system using the supplied “RJ11 6P4C‑to‑USB cable.”

Plug the sensor into the IEC14 socket.

The sensor is automatically detected by the system.

Monitoring of IEC C13, C14, and Other Sockets

With the help of an adapter, IEC C13 or C14 sockets can be monitored. Here is an example of an adapter available at a nearby electronics store.

Monitoring of IEC C13, C14, and Other Sockets

With a suitable adapter, IEC C13 or C14 sockets can be monitored.

Here you can see an example of an adapter available at a nearby electronics store.

Function and Purpose

Applications

Dimensions and technical data:

Connecting the sensor:

Sensor Installation

Monitoring of IEC C13, C14, and Other Sockets

Monitoring of IEC C13, C14, and Other Sockets

Wiring diagram: