DT82E Intelligent Environmental Data Logger

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

  • 2 to 6 Universal Analog Sensor Channels
  • ±30 V Input Measurement Range
  • 4 Bi-Directional Digital Channels
  • 4 High Speed Counter Channels
  • 1 SDI-12 Channel
  • Built-in Display
  • USB Memory Slot for Easy Data Transfer


The Environmental Data Logger

The dataTaker DT82E is an intelligent data logger that was designed with environmental applications in mind. The DT82E is a robust, stand alone, low power data logger featuring USB memory stick support, 18 bit resolution, extensive communications capabilities and built-in display. The dataTaker DT82E’s Dual Channel Isolation allows 4, 2 wire differential or 6 common referenced analog inputs to be used in many combinations.

Versatile Communication Methods

With support for SDI-12 sensor networks, TCP, FTP and Web interface, 12V regulated output to power sensors, the DT82E is ready to be rolled out into environmental, industrial and many other types of monitoring projects.

Communications features include RS232 with modem support, Ethernet and USB memory stick ports. Connect to the DT82E locally, remotely or over the Internet. The web interface allows users to configure the DT82E, access logged data and see current measurements as mimics or in a list using a web browser. FTP provides data to your office over the internet or mobile phone network, without the need for polling or specific host software.

Versatile Channel and Inputs

Analog and digital channels, along with high-speed counter inputs, allow the DT82E data logger to easily connect to most sensors and data measurement sources. Temperature, voltage, current, 4-20mA loops, resistance, bridges, strain gauges, frequency, digital, serial and calculated measurements can all be scaled, logged and returned in engineering units or within statistical reporting. Group sampling, logging, alarm and control tasks within schedules to suit your requirements.

Large storage and Easy Data Management

Store up to 10 million data points in user defined memory, log as much or as little as you need with independent control of schedule size and mode. Overwrite or stop logging once allocated memory is full. Archive data on alarm event, copy to USB memory or transfer via FTP, the choice is yours.

Read more about how the DT82E environmental data logger was used in Water Quality Monitoring.


Analog Channels
Data Channels Up to 6 Analog Channels
Up to 4 Flexible Digital Channels
Analog Channels 2 Wire w/ Com. Ref. Terminal: 6 Channels
2 Wire Isolated: 4 Channels
3 or 4 Wire Isolated: 2 Channels
Analog Inputs Inter-Channel Isolation: 100 Volts (Relay Switching)
Analog Section Isolation: 100 Volts (Opto-Isolated)
Input Impedance: 100 KO, >100MO
Common Mode Range: ±3.5V or ±35V on 30 Volts Range
Analog Measurement Ranges Voltage: ±30 mVdc; ±300 mVdc; ±3 Vdc; ±30 Vdc
Current: ±0.3 mA; ±3 mA; ±30 mA
Resistance: 100O; 1,000O; 10,000O
Frequency: 100Hz; 10 kHz
Analog Measurement Resolution Voltage: 0.25µV; 2.5µV; 0.25µV; 250µV
Current: 2.5nA; 25 nA ; 250 nA
Resistance: 1.5 mO; 15 mO; 150 mO
Frequency: 0.0002%; 0.0002%
Accuracy DC Voltage: 0.1% (5°C to 40°C); 0.35% (-45°C to 70°C)
DC Current: 0.15% (5°C to 40°C); 0.45% (-45°C to 70°C)
DC Resistance: 0.1% (5°C to 40°C); 0.35% (-45°C to 70°C)
Frequency: 0.1% (5°C to 40°C); 0.25% (-45°C to 70°C)
Sampling Integrates over 50/60 Hz Line Period for Accuracy and Noise Rejection
Maximum Sample Speed: 25 Hz
Effective Resolution: 18 Bits
Linearity: 0.01%
Common Mode Rejection: >90dB
Line Series Mode Rejection: > 35dB
Sensor Excitation (Supply) Analog Channles: Selectable 250µA or 2.5mA Precision Current Source, 4.5V Voltage Source, or Switched External Supply
General Purpose: Switchable 12V Regulated Supply for Powering Sensors & Accessories (Max. 150mA)
Analog Sensors
Thermocouples Type: B, C, D, E, G, J, K, N, R S, T
Calibration Standard: ITS-90
RTDs Materials Supported: Pt, Ni, Cu
Resistance Range: 10O to 10KO
Thermistors Type: YSI 400xx Series, other Types*
Resistance Range: <10kO**
* Other Thermistor Types are Supported by Thermistor Scaling and Calculated Channels
** Resistance Range Can Be Increased with the Use of a Parallel Resistor.
Monolithic Temperature Sensors Type: LM34 – 60, AD590, AD592, TMPxx, LM135, LM235, LM335
Strain Gauge and Bridge Sensors Configurations: 1/4, 1/2 & Full Bridge
Excitation: Voltage or Current
4-20mA Current Loop Internal 100R Shunt or External Shunt Resistor
Digital Channels
Digital Input/Outputs 4 Bi-Directional Channels
Digital Input Type: 4 Logic Level (Max. 20/30 Volts)
Digital Output Type: 3 With Open Drain FET (Max. 30V, 100mA), 1 with Logic Output
Relay Output 1 Latching Relay, contacts (Max: 30Vdc, 1A)
Counter Channels
Low Speed Counters — 4 Counters Shared with Digital Inputs
— 32 Bit Size
— 10 Hz Max Count Rate
— Low Speed Counters do not Function in Sleep Mode
Dedicated Counter Channels — 4 High Speed Inputs
— 32 Bit Size
— 10kHz Max Count Rate
— 2 Logic Level Inputs (Max ±30V)
— 2 Sensitive Inputs (10mV) for Magnetic Pick Ups (Max. ±10V)
Serial Channels
SDI-12 — 1 SDI-12 Inputs, Shared with Digital Channels
— Each input can support up to 10 SDI-12 Sensors
Generic Serial Sensor — Flexible Option for Logging From Wide Range of Smart Sensors and Data Streams
— Host RS232 Port* (Available Port)
— 300 to 115,200 Baud Rate
* If used as a Serial Sensor channel then the Host Port is Not Available for Other Communications
Calculated Channels
General Combine values from analog, digital and serial sensors using expressions involving variables and functions.
Functions Arithmetic, Trigonometric, Relational, Logical and Statistical
Condition High, Low or Within Range and Outside Range
Delay Optional Time Period for Alarm Response
Actions Set Digital Outputs, Transmit Message, Execute any DataTaker Command
Scheduling of Data Acquisition
Condition High, Low or Within Range and Outside Range
Number of schedules 11
Schedule rates 10ms to days
Internal Data Storage Capacity: 128mb = approx 10,000,000 data points
Removable USB storage device Type:compatible with USb 1.1 or USB 2.0 drivers, e.g. Flash drive
Capacity: approx 90,000 data points per megabyte
Communication Interfaces
Ethernet Port Interface: 10BasteT (10Mbps)
Protocol: TCP/IP
Host RS232 Port Speed: 300 to 115,200 Baud (57,600 Default)
Flow Control: Hardware (RTS/CTS), Software (XON/XOFF), None
Handshake Lines: DCD, DSR, DTR, RTS, CTS
Modem Support: Auto-Answer and Dial Out
Protocols: ASCII Command, TCP/IP (PPP), Serial Sensor
Network TCP/IP Services
Network Ethernet and/or Host RS232 (PPP) Communication Ports
Command Interface Access the ASCII command interface via TCP/IP
Web Server — Access Current Data and Status from any Web Browser
— Download Data in CSV Format
— Command Interface Window
— Define Mimic Displays
FTP Client Automatically upload logged data direct to an FTP server.
Display and Keypad Type: LCD, 2 Line by 16 Characters, Backlight
Functions: Channel Data, Alarms, System Status
Keypad: 6 Keys for Scrolling and Function Execution
Status LEDs: 4 (Sample, Disk, Attention, Power)
Firmware Upgrade Via: RS232, Ethernet, USB disk.
Real Time Clock Normal resolution: 200µs
Accuracy: ±1 min/year (0°C to 40°C), ±4 min/year (-40°C to 70°C)
Power Supply External Voltage Range: 10 to 30 Volts DC
Peak Power: 6 W (12 Volts DC 1 Amp)
Average power Consumption (typtical) 1 Sec Sampling: 560 mW (1 Sample); 926 mW (6 Samples)
5 Sec Sampling: 250 mW (1 Sample); 337 mW (6 Samples)
30 Sec Sampling: 50 mW (1 Sample); 65 mW (6 Samples)
1 Min Sampling: 30 mW (1 Sample); 38 mW (6 Samples)
5 Min Sampling: 14 mW (1 Sample); 16 mW (6 Samples)
30 Min Sampling: 11 mW (1 Sample); 11 mW (6 Samples)
1 Hr Sampling: 11 mW (1 Sample); 11 mW (6 Samples)
Physical Environment
Construction Powder Coated Steel & Anodized Aluminum
Dimensions 18.0 cm x 13.7 cm x 6.5 cm (180mm x 137mm x 65mm)
Weight 900 grams
Operating Range Temperature: -45°C to 70°C (Reduced LCD Operation Outside Range: -15°C to 50°C)
Humidity: 85% RH, Non-condensing


dEX Software

dEX is an intuitive graphical interface that allows you to configure your data logger, view real-time data in mimics,
trend charts or tables and retrieve your historical data for

dEX comes pre-installed on every logger in the DT80 range. The software loads in your web browser so there is no need to install cumbersome applications on your computer. Being browser-based, dEX will work on all major operating systems including Windows, Mac and Linux.

Configuration Editor

dataTaker dEX Configuration EditorThe configuration editor allows you to view, edit and save logger configurations in an easy-to-use Windows Explorer style user interface. The configuration tree view allows definition of measurement schedules and measurements.

Wiring diagrams show available wiring configurations for each sensor type. Configuration can be stored and retrieved on either the logger or a local computer.

Mimics and Charts

dataTaker dEX Mimics and ChartsMimics are organized into panels which can be modified to highlight custom alarm conditions or data grouping. Mimics include dials, bar graphs, thermometers, etc. Real-time chart recorder mimic allows you to view trends and historical data over a custom time/date range. Up to 16 mimics can be displayed on up to 5 mimic pages.


Minimum System Requirements

  • Web browser – IE7 or later, Safari, Google Chrome, Firefox
  • Adobe Flash Player (10 or higher)
  • Screen resolution of 1024 x 768