Measurement data acquisition with Expert Logger
Analog and digital signals under control
Whether in research, industry or plant monitoring - as a universal measurement data logger, the Expert Logger offers a powerful and flexible platform for the precise acquisition, recording and analysis of technical measurement data.
The modular architecture enables use in a wide range of applications - from mobile data acquisition to permanent system integration. Thanks to versatile interfaces, simple configuration and integrated intelligence, the Expert Logger can be quickly and efficiently integrated into existing processes.
This turns complex measurement technology into a practical solution - tailored precisely to your requirements.
Product highlights
- Processes up to 46 analog input channels
- FPGA technology ensures fast and precise measurements
- Connection via USB, LAN, LTE and various fieldbuses
- Stores up to 960 million measured values internally
- PUSH function sends measurement data automatically
- Four versions for different duct requirements
- Software channels enable internal signal processing
I/Os and interfaces
The clear display of all inputs and outputs as well as communication interfaces enables efficient system integration and uncomplicated commissioning.
Input signals
- Voltage/Currents
- Thermocouples
- DMS
- Resistance/RTD
- Digital input
- Frequencies/SDI-12
Output signals
- Voltage/Currents
- PWM
- Digital output
Expert Logger
Interfaces
- LAN
- USB
- GPS
- RS 232/485
Protocols
- PROFINET
- PROFIBUS
- CAN
- Modbus TCP
- Modbus RTU
- OPC UA
- OPC UA HA
Here you will find an overview of the standard and optionally available Hardware interfaces and protocols. Find out more about the interface diversity our measurement technology software.
With Expert Logger, configuration does not become the main task, but users can concentrate fully on the measurement task. Typical solutions with the Expert Logger are
- Data logging
- Environmental measurement technology
- Product testing
- Measurement data diagnosis
- Laboratory data acquisition
- Trials and tests
- Energy optimization
Functions
Expert Logger - Future-proof data logging for industry, the environment and test engineering
The Expert Logger is a powerful, modular system for recording, processing and forwarding measurement data. Whether stationary or mobile, in the laboratory or in the field - the Expert Logger impresses with its versatile interfaces, intelligent signal processing and simple operation. Industry 4.0 capability included.
- Open communication with OPC UA - The Expert Logger supports OPC UA both as a server and as a client. This allows data to be exchanged securely and in a standardized manner with OPC UA-capable sensors, controllers or subsystems. This openness makes the system ideal for future-oriented applications in the sense of Industry 4.0.
- Versatile interfaces for maximum integration - In addition to OPC UA, other industrial protocols such as PROFIBUS, Modbus, CAN bus and serial interfaces are also available. This allows the logger to be easily integrated into existing system architectures and automation solutions - without any additional hardware.
- Fast sensor connection - well thought-out and clear - Sensors are connected via plug-in screw terminals, which simplifies installation and maintains clarity even with a high channel density. Four terminals each can be flexibly configured for differential inputs or Pt100(0) sensors in a four-wire circuit.
- Simple configuration - online and offline - The device is configured intuitively using PC software. Changes can be prepared offline and transferred later. All settings are retained even if power is lost - for smooth commissioning and trouble-free use.
- Intelligent signal processing directly in the device - Thanks to powerful software channels, measured values can be processed, calculated or evaluated internally - e.g. for averaging, limit value recognition, time functions or integrations. This reduces the need for external evaluation systems and saves time.
- High storage capacity - internally and externally expandable - An internal memory of 32 GB enables the recording of up to 960 million measured values with millisecond-accurate time stamps. If required, the memory can be expanded as required via USB or NAS - even with event-controlled recording.
- Secure data transfer - automated and flexible - Measured values can be automatically transferred to the Internet or to external storage devices using the PUSH function. The device also supports event-triggered transmissions with pre- and post-processing - ideal for time-critical applications or remote analysis.
- Reliable monitoring and alarming - Thanks to built-in limit value monitoring, digital outputs can be controlled or automatic notifications can be triggered by e-mail and SMS. This allows you to keep an eye on critical values at all times - even remotely.
- Mobile and self-sufficient operation - The logger can also be operated with batteries or rechargeable batteries for mains-independent use. Wake-up and measurement intervals are freely adjustable, which enables energy-efficient long-term operation - e.g. for environmental or outdoor measurements.
- Direct access via touch display - The integrated touch display enables the configuration of basic settings such as IP address and netmask as well as the direct display of selected measured values. It can be operated by touch or alternatively via a connected USB mouse.
Expert Logger - detachable screw terminal illustration
Versions
Flexibly scalable - with large storage capacity and precise timestamp
The Expert Logger is available in four versions with varying numbers of analog and digital inputs. All models have an internal 32 GB memory for autonomous recording of up to 960 million measured values - including date and time stamp in the millisecond range. If required, the storage capacity can be flexibly expanded via USB or a NAS system.
Expert Logger - Available as type 100, type 200, type 300 or type 400
| Type | 100 | 200 | 300 | 400 |
|---|---|---|---|---|
| Analog inputs for mV, mA, thermocouples | 16 | 32 | 46 | 16 |
| Appropriate for RTD's | 8 | 16 | 23 | 8 |
| Sampling rates (measurements / sec.) | 1000 | 2000 | 3000 | 1000 |
| Analog outputs | 0 | 0 | 0 | 6 |
| Digital / Frequencies inputs | 4 | 4 | 0 | 1 |
| SDI 12 sensor bus | 1 | 1 | 0 | 0 |
| Digital / PWM outputs | 4 | 4 | 0 | 0 |
| Digital inputs / outputs | 4 | 4 | 1 | 24 |
Here you will find an overview of the standard and optionally available Hardware interfaces and protocols. Find out more about the interface diversity our measurement technology software.
FAQ
The Expert Logger from Delphin Technology is a modular, universal data logger designed for the precise acquisition, storage, processing, and transmission of measurement data. It is suitable for use in industry, research, environmental measurement, test benches, energy optimization, and plant monitoring—both in stationary and mobile applications.
Continuous operation requires devices with industrial-grade components and non-volatile configuration. The Expert Logger from Delphin is designed for 24/7 industrial operation and enables continuous process monitoring for years—without the need for a PC running continuously.
Yes—with the Expert Logger from Delphin, all device settings are stored non-volatily and are fully preserved even in the event of a power loss. Once power is restored, the device automatically resumes measurement without requiring any reconfiguration.
Thanks to preconfigured interfaces, pluggable sensor connectors, and intuitive configuration software, commissioning the Expert Logger from Delphin is significantly faster than with many other modular systems. The configuration can be prepared offline and transferred to the device later.
Yes—the Expert Logger from Delphin features a built-in touchscreen display. This allows you to configure basic settings such as the IP address and subnet mask, as well as view selected measurement values directly on the device. It can be operated via the touchscreen or, alternatively, using a connected USB mouse.
No—the Expert Logger from Delphin processes measured values directly within the device via so-called software channels. Averaging, threshold detection, time functions, and integration are configured via settings rather than through programming. This allows the device to be used either as a standalone monitoring device or as a PLC replacement.
The Expert Logger from Delphin measures voltage and current, thermocouples, Pt100 and Pt1000 sensors (RTDs), resistances, strain gauges (SG), digital signals, and frequencies, as well as sensors on the SDI-12 sensor bus. All measurement parameters can be recorded simultaneously in a single device.
Depending on the device type, the Expert Logger offers between Delphin and 46 analog channels, as well as additional digital inputs and outputs. The four models offer 16, 32, 46, and 16 analog inputs, respectively—half of which can be used for Pt100(0) sensors in a four-wire configuration.
The Expert Logger from Delphin uses a 24-bit sigma-delta converter and achieves an accuracy of 0.01 % of the full-scale value for voltage and current measurements, and 0.02 % for resistance measurements in a 4-wire configuration. Pt100 measurements are accurate to 0.10 °C. The voltage measurement ranges extend from ±156 mV to ±10 V.
Thanks to FPGA-based measurement data acquisition, the Expert Logger from Delphin achieves a total sampling rate of 1,000 Hz per channel group—meaning up to 3,000 measurements per second for the Type 300, which has three groups. This allows even faster process operations to be documented seamlessly.
Depending on the model, the Expert Logger from Delphin has two to six internal reference measurement points. This achieves an accuracy of 0.1 % of the measurement range after sensor compensation. Alternatively, an external thermoblock with an accuracy of 0.3 K can be connected.
The Expert Logger from Delphin, in its 100 and 200 models, offers an integrated strain gauge supply voltage—5 VDC ±10 mV internally, and externally selectable at 1, 2.5, 5, or 10 V. This allows for force, pressure, and strain measurements without the need for additional amplifier hardware.
The Expert Logger from Delphin, in its 100 and 200 models, features an SDI-12 sensor bus. This allows digital environmental sensors—such as those for soil moisture, water levels, or weather data—to be connected directly and recorded together with analog measurements in a single device.
The Expert Logger from Delphin offers digital/frequency inputs up to 1 MHz with 64-bit counters. This allows flow, energy, and speed pulses to be recorded over long periods of time without the risk of overflow. The inputs are galvanically isolated from PE and from each other at ±400 VDC.
Galvanic isolation prevents ground loops and increases operational safety. In the Delphin Expert Logger, the channels are isolated from PE and from each other—with an isolation voltage of ±400 VDC and a dielectric strength of ±110 VDC. This effectively prevents interference between different potentials.
The Expert Logger Type 400 from Delphin features six analog outputs with 16-bit resolution and output ranges from 0 to 10 V and 0 to 20 mA, respectively. Supplemented by 24 digital inputs/outputs and PWM signals (5 Hz to 10 kHz), it is suitable for control and regulation tasks on test benches.
The Expert Logger from Delphin features 32 GB of internal memory for up to 960 million data points—including date and millisecond-level timestamps. Storage can be flexibly expanded via USB media, network storage (NAS with NFS or CIFS), and (S)FTP.
Yes—the Expert Logger from Delphin records measurement data either on a time-based or event-based schedule, including both preceding and subsequent data in each case. This ensures that only relevant process segments are stored, which saves storage space and significantly simplifies the subsequent analysis of fault events.
The Expert Logger from Delphin automatically transmits measurement data to the Internet or to external storage devices via the PUSH function. In addition, network protocols, open APIs, and direct integration with IT and automation systems are available. Event-triggered transmissions with pre- and post-data are also possible.
Yes—the Expert Logger from Delphin monitors threshold values directly within the device and, when necessary, triggers digital outputs or automatic notifications via email and SMS. Since the monitoring runs within the device, the alarm system functions even without a running PC or a higher-level control system.
Technical specifications
| Expert Logger device type | 100 | 200 | 300 | 400 |
| Analog inputs (mV, mA, TC) | 16 | 32 | 46 | 16 |
| Appropriate for RTD's | 8 | 16 | 23 | 8 |
| Total sampling rate | 1000 Hz | 2 groups à 1000 Hz | 3 groups à 1000 Hz | 1000 Hz |
| Voltage measurement range | ±156 mV .. ±10 V | |||
| Current measuring range | 0 .. 20 mA, 4 .. 20 mA, free | |||
| Current reference for restistance measurement | 100 μA, 200 μA or 1 mA (4-wire); 2 x 200 µA (3-wire) | |||
| Resistance measurement range | 0 .. 100 kΩ | |||
| Resolution/type ADC / input impedance | 24 bit Sigma-Delta / 1GΩ | |||
| Internal reference junctions | yes / 2 | yes / 4 | yes / 6 | yes / 2 |
| Withstand voltage / galvanic isolation | ±110 VDC / ± 400 VDC to PE, other channel group | |||
| Measuring accuracy voltage, current | 0.01% from upper range value | |||
| Measuring accuracy resistance measurement | 0.02% of the measuring range end value (4-wire connection) | |||
| Measuring accuracy thermocouples* | External thermoblock: 0.3 K Internal reference measuring point: 0.1 % of the measuring range after sensor compensation | |||
| Measuring accuracy Pt 100 (4-wire connection) | Measuring range -260 °C to 147 °C: 0.10 °C Measuring range -260 °C to 596 °C: 0.20 °C Measuring range -260 °C to 849 °C: 0.43 °C | |||
| Measuring accuracy Pt 1000 (4-wire connection) | Measuring range -260 °C to 64 °C: 0.10 °C Measuring range -260 °C to 408 °C: 0.15 °C Measuring range -260 °C to 849 °C: 0.35°C | |||
| Strain gauge voltage excitation | 1 | 1 | 0 | 0 |
| Voltage | internal: 5 VDC ± 10 mV, external: 1 / 2.5 / 5 / 10 V | |||
| Analog outputs | 0 | 0 | 0 | 6 |
| Resolution | 16 bit | |||
| Output ranges | 0 .. 10 V / ± 10 V / 0 ... 5 V / ± 5 V / 0 ... 12 V / ± 12 V / 0 ... 6 V / ± 6 V / 0 ... 20 mA / 0 ... 24 mA / 4 ... 20 mA / | |||
| Galvanic isolation | ± 400 VDC to system / PE | |||
| Min. load / max. burden | 625 Ω / 950 Ω | |||
* These measuring accuracies apply to positive measuring temperatures (> 0°C). For measurements in the negative temperature range, we recommend calibration at the respective operating point.
| Expert Logger device type | 100 | 200 | 300 | 400 |
| Number of digital channels | ||||
| Digital inputs up to 1 MHz | 3 | 3 | 0 | 0 |
| Digital inputs up to 250 Hz | 1 | 1 | 0 | 1 |
| Digital outputs | 4 | 4 | 0 | 0 |
| Digital inputs / outputs | 4 | 4 | 1 | 24 |
| Technical information digital inputs | ||||
| Input signal | low: 0 .. 1 V/ high:5 .. 100 [email protected] mA | |||
| Frequency range / width counter | 0,2 Hz .. 1 MHz, respectively 0,2 Hz .. 250 Hz / 64 bit | |||
| Galvanic isolation | ± 400 VDC to PE / other channels | |||
| Technical information digital outputs | ||||
| Max. switching voltage / current | 50 V / 2.5 A for 2 seconds, 250 mA continuous current | |||
| PWM function / pulse duty factor | Basic frequency 5 Hz .. 10 kHz / 1:1000 | |||
| Galvanic isolation | ± 400 VDC to PE / other channels | |||
| Data storage | ||||
| Data storage internal | 32 GB (approx. 960 million measured values) | |||
| Data storage external | USB, NFS, CIFS, (S)FTP | |||
| Expert Logger device type | 100 | 200 | 300 | 400 |
| Interfaces / protocols | ||||
| SDI 12 sensor bus | 1 | 1 | 0 | 0 |
| COM1 and COM 2 | RS485, 9-pin Sub-D socket / ASCII, SCPI, Modbus RTU Master & Slave, PROFIBUS DPV1 Slave with sniffer function | |||
| COM 3 | RS232, 9-pole sub-D plug / ASCII / SCPI / Modbus RTU | |||
| LAN | 1 x 1000BASE-T | |||
| USB | Device 2.0 / Host 2.0 low / high / full | |||
| TCP / IP | Modbus TCP Server & Client, OPC UA Server & Client, OPC UA HA Server (optional) | |||
| PROFINET (TCP/IP) | PROFINET RT Device, IO/MRP/LLDP, Conf Class B, RT Class 1, Netload Class III, I&M 0,1,2,3,5, 2xRJ45 100MBit/s full duplex | |||
| CAN / RS 232/485 | 2 x CAN 2.0 / Modbus RTU Master & Slave, SCPI, ASCII, SMTP, NTP, PTP | |||
| General technical information | ||||
| Dimensions / weight | W 217 mm x H 88 mm x D 128 mm / 750 g | |||
| Fixing | Mounting rail DIN EN 60715 or screw mounting | |||
| Connecting terminals | Plug-in screw terminals, 96 terminals in 2 rows, max. 1.5 mm² | |||
| Temperature range | -20 .. 50 °C* | |||
| Humidity | max. 90 % relative humidity, non-condensing | |||
| Supply voltage | 12 .. 24 V / ± 10% | |||
| Power input normal mode | max. 15 watts | |||
* Sufficient air circulation in the control cabinet must be ensured.
Status: 20.02.2025
Software
Software interfaces
Modern software interfaces make Expert Logger compatible with common industrial and IoT systems.
Interfaces
- OPC (Server/Client)
- OPC UA (Server/Client)
- OPC UA HA (Server)
- API
- Python
- SQL
- LabView
- Diadem
- Modbus TCP
- DasyLab
DataService / Data Center
Expert Logger
Suitable software for Expert Logger
Data acquisition and analysis
Display and monitor measurement data live | Intuitive operation and easy handling without programming knowledge | Versatile diagram and analysis functions for various measurement data | Ready for data acquisition and analysis in just a few minutes
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Operating and monitoring
Reliably record and save measurement data | Clearly display and evaluate measured values | Quickly set up and operate projects without programming effort | Ideal for individual measuring stations up to small measuring systems
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Automate and control
Monitor measurement data and control processes directly | Create automations simply by dragging and dropping | Suitable for complex test benches and automation tasks | Implement and adapt projects without programming knowledge
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Visualisation and operation
Easily create your own visualizations for measurement data | Conveniently evaluate and log measurement and process data | Intuitive interface for efficient work without programming knowledge | Ideal for individual measuring stations through to complex monitoring solutions
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Data acquisition and saving
Display and monitor signals and processes in real time | Easy handling with no training required | Access to measurement data from PC, tablet or smartphone | Ready for many measurement and analysis tasks in just a few minutes
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Central measurement data management
Central storage of operating, maintenance and process data | Cross-site real-time monitoring of machine and process statuses | Modular structure makes it easy to adapt to growing plant and process environments
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Software channels as extended functions
Realise and execute monitoring and automation tasks easily
Our measuring and testing devices have extended functions, which are summarized under the term software channels. The online measurement data is offset against the software channels and then used for visualization, storage or control.
In this way, entire programme sequences can be configured very simply and intuitively with the regulation and control function. These then run autonomously without PC support. This is how you use your data logger effectively, also as a monitoring device or PLC replacement.
The software channels enable functions such as limit value monitoring, integration or online calculation and are configured very easily. This means that even users who are not experts in programming can easily implement their own monitoring tasks or balancing independently in the unit.
More information