Delphin Expert Logger 300

46 Channel Data Logger

  • 46 Universal analog inputs (mV mA, TC, RTD)
  • Sampling rate 3000 m/sec
  • 1 Digital Input
  • 1 Digital Output
  • 2 Gb Internal Storage
  • Software required and sold separately

Call for configuration and price. 1-800-956-4437


Expert Logger 300 Data Acquisition System

The Expert Logger 300 is Delphin‘s new generation of data loggers. It combines the latest communication technology with advanced measurement technology, and is based on FPGA technology to make it especially powerful. It can process up to 46 analog input channels at both low and high rates of sampling. Measurement data can be accurately acquired, independently stored and transmitted to the internet or a PC for evaluation via USB, LAN, WLAN or LTE.

Operation made simple

Sensors are connected via plug-in screw terminals and a chart clearly shows how channels are arranged. Users always have a good overview of the channels despite their high density. Each set of four terminals can be configured as two differential inputs to measure voltage, currents, thermocouples, or to take measurements from a 4-wire RTD.

Configuration – Fast and Easy

The Expert Logger 300 is simple to configure from a PC. These settings remain stored within the Expert Logger even when disconnected from the power supply. The device settings can also be read out and stored on a PC and analysed offline without the need for a connected Expert Logger. The offline configuration settings are then simply read into the device when connected. The software used for configuration is simple to operate to let users fully focus on their measurement tasks.

Intelligent Signal Processing

Signal processing using internal software channels significantly simplifies measurement tasks. Flexible calculation channels enable measurement data to undergo further computation and recording. Integrators directly calculate volumes or quantities from time related measurement data such as mass and discharge flow rates. Limit values can monitor measurement data and be used to switch digital outputs or automatically send emails. Complex signal processing is possible using pulse counters, stop-clock functions and operating-hours counter. Averages can be calculated and recorded as time-weighted or moving. The Expert Logger‘s software channels clearly set it apart from other loggers and make it very popular among users.


  • Data logging
  • Environmental measurement technology
  • Product testing
  • Measurement data diagnosis
  • Lab data acquisition
  • Trials and tests
  • Energy optimization


Device Type





Analog inputs (mV, mA, TC) 16 32 46 16
Appropriate for RTD’s (8) (16) (23) (8)
Sampling rate 1000 Hz 2 groups
per 1000 Hz
3 groups
per 1000 Hz
1000 Hz
Voltage / current measurement range ±156 mV .. ±10 V / 0 .. 20 mA, 4 .. 20 mA, free
Current reference for restistance measurement None, 100 μA, 200 μA or 1 mA software switchable
Strain gauge voltage ref, 5 VDC ±10 mV 1 1 0 0
Resolution / input impendance 24 Bit / 1 GΩ
Internal reference junctions yes/2 yes/4 yes/6 yes/2
Wthstand voltage / Galvanic isolation ±110 VDC / ±400 VDC to PE, other channel group
Analog outputs
Resolution 16 Bit
Output ranges 0 .. 12V/±12V/0 .. 20 mA/4 .. 20 mA
Galvanic isolation ±400 VDC to system / PE
Min. load/ max. burden 625Ω/950Ω
Number of digital channels
Digital inputs to 1 MHz 3 3 0 0
Digital inputs to 250 Hz 1 1 1 1
Digital outputs 4 4 1 0
Digital inputs / outputs 4 4 0 24
Technical information digital inputs
Input signal low: 0 .. 1V/high:5 .. 100 VDC@3,5 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 50V/2,5A
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 2 .. 14 GB (30 million measurement values per GB)
Data storage external USB, NFS, CIFS, (S)FTP
Interfaces / protocols
Sensor bus SDI12 1 1 0 0
COM1 und COM 2 RS485, 9-pole sub-D plug/ASCII, Modbus RTU, PROFIBUS DPV1 Slave
COM 3 RS485, 9-pole sub-D plug/ASCII, Modbus RTU
LAN 1000 Base-T
WLAN (alternative to WWAN) 802.11 b / g / n
WWAN (alternative to WLAN) UMTS, LTE max. 100 Mbit/s
USB Device 2.0 low-/full-/high-speed/Host 2.0 low-/full-/high-speed
TCP/IP protocols (LAN, WLAN, WWAN, USB) Modbus TCP, OPC UA
CAN 1 und CAN 2 CAN RAW protocols, Delphin expansion bus
General technical information
Dimensions / weight H 210 x B 80 x T 125 mm / 750 g
Fixing Rail mounting DIN EN 60715 or screw fixing
Signal connections Plug-in screw terminals, max. 1.5 mm², 96 in 2 rows
Temperature range -20 .. 50° C
Power supply 12 .. 24 V / ± 10%
Power input normal mode max. 10 W
Power input sleep mode 5 mW@12 V, 10 mW@24 V


Sensor connection

  • Universal analog inputs (mV mA, TC, RTD)
  • Digital inputs and outputs
  • Plug-in screw terminals

Serial and SDI12 interfaces

  • SDI12 interfaces for environmental sensors
  • Serial RS232 ports and a RS485
  • Configuration of individual ASCII protocols

Battery and rechargeable operation

  • Independent operation possible with batteries orrechargeables
  • Minimal energy consumption via a sleep function
  • User-defined wake and measuring intervals

Internal data storage

  • 4 GB of internal data storage for up to 125 million measurement values
  • Time stamps to msec resolution
  • Data read out via LAN, WLAN or USB interface

External data storage

  • Data recorded to external storage media (USB, NAS)
  • PUSH function to send measurement data to theinternet
  • Event-triggered recording with pre and post histories

Remote monitoring

  • WLAN link to PCs and mobile devices
  • Optional LTE / UMTS / 4G integrated modem
  • Automatic notification via email or text messaging

PC and field bus interfaces

  • LAN and USB interface to a PC or network
  • CAN-Bus interface for reading / writing identifiers
  • Field bus interfaces PROFIBUS DP, Modbus

Monitoring functions

  • Monitoring and data logging in a single device
  • Limit value setting for any sensor signal or calculationchannel
  • Controlling digital outputs with user-defined triggering
  • Logging of pictures from webcam by external trigger

Signal processing

  • Averaging (middle, min, max, RMS values)
  • Integration of time signals into volumes, masses or working values
  • Computational functions (basic functions, polynomial, trigonometric …)

Touch display

The touch display enables users to configure the Expert Logger‘s basic settings such as the IP address and network mask. The display also simultaneously shows selected measurement data. The display operates via either touch or an external USB mouse.


ProfiSignal Go enables users to portray measurement data online and offline and to carry out detailed analysis. The software can portray the Expert Logger‘s measurement data in trends. Users can choose between y(t) or y(x) diagrams as well as a range of other analysis diagrams. ProfiSignal Go is especially intuitive to make it highly user friendly.

Installation is very simple. It takes just a few mouse clicks to go from sensor connection to trend output.

Unlimited Trends

There are virtually no limits to trend portrayal for online and offline measurement data. Archived and online measurement data can be evaluated without having to interrupt ongoing measuring procedures. This is a unique function that is especially valued by customers.

In addition to y (t) diagrams are y (x) – and logic diagrams. The ProfiSignal Go Toolbox contains trend functions such as movable axes, zoom functions, cursors, markers and data export (e.g. as CSV or EMF files). Using the toolbox is self-explanatory. Configured trends can be saved and reused.

For visualization and automation functions, software upgrades to ProfiSignal Basic and ProfiSignal Klicks are possible at any time.

Alarm Functions

ProfiSignal Go also provides alarm management. A global alarm list provides a clear portrayal alarm notifications in tabular form. Alarm settings for the monitoring of over-runs, under-runs, process violations, status outcomes etc. are configured using the DataService/Configurator software. Measurement data can also be used to trigger specific actions, e.g. sending text messages or emails or switching digital outputs.

Interfaces and Drivers

Delphin products are equipped with drivers and interfaces to enable the import/export of data to external hardware and software. Laboratory equipment (e. g. scales, analysis/output devices) can be connected via USB and RS232/RS485 interfaces. A variety of protocols are available.

PROFIBUS and Modbus are used for data transfer between process control systems. The following interfaces are available for third-party software:

  • LabVIEW™
  • DASYLab™
  • OPC-Server
  • OPC Client
  • Modbus TCP-driver
  • OCX-driver
  • GPS-converter