DT82EM - Intelligent Data Logger with integrated Cellular Modem

Product Description

The dataTaker DT82EM is a robust, stand alone, ultra low powerdata logger with an integrated 2G/3G modem that allows it to beused across a wide variety of remote applications.

Automatic Data Delivery

The days of travelling long distances to get your data are over.The DT82EM's automatic data delivery features allow you to scheduleyour data to be automatically emailed to your inbox every day,week, month or other time interval. More sophisticated systems canmake use of the automatic data delivery features to send loggeddata to a FTP server.Alarm conditions can also trigger datadelivery or alarm messages to multiple email addresses or mobilephones.de

Termined Communications

Mobile network outages can occur at any time and can last forminutes or days, however dataTaker have gone to great lengths toensure the reliability of data transmissions. The DT82EM canrecognise incomplete downloads and will try again until the entiredata file is transmitted, ensuring no lost data. If the networkdrops your logger, the modem automatically reconnects before thenext scheduled transmission.If the mobile network has marginalcoverage, the DT82EM can scan for alternative networks and selectthe strongest signal.

Easy to Configure

The DT82EM is configured directly in your web browser usingdatataTaker's dEX graphical interface. dEX takes you through theconfiguration of your logger, showing you wiring diagrams andallowing you to decide - in as much or as little detail - how youwant the system to work, suiting both novice and advancedusers.Using the internal modem you can even re-configure yoursystem remotely over the internet if required.

Applications include:

  • Environmental Monitoring
  • Agricultural Research
  • Research & Development
  • Total Energy Monitoring Temperature Profiling
  • Weather Stations
  • Thermistor Arrays
  • Aquaculture
  • Wind Power Generation

Technical Specification

Analog Channels

2 analog input channels

Each channel is independent and supports: one isolated

3-wire or 4-wire input, or two isolated 2-wire inputs, or

three common referenced 2-wire inputs.

Two wire with common reference terminal: 6

Two wire isolated: 4

Three and four wire isolated: 2


Fundamental Input Ranges



The fundamental inputs that the DT82EM can measure


are voltage, current, resistance and frequency. All other

measurements are derived from these.

Auto-ranging is supported over 3 ranges.


Accuracy table above is % of reading ±0.01% of full scale.






Integrates over 50/60Hz line period for accuracy and noise



Maximum sample speed: 25Hz

Effective resolution: 18 bits

Linearity: 0.01%

Common mode rejection: >90dB

Line series mode rejection: >35dB





Inter-Channel Isolation: 100V (relay switching)


Analog Section Isolation: 100V (opto-isolated)

Input impedance: >100MΩ, 100KΩ (30v range)

Common mode range: ・}3.5V or ・}30V on 30V range


Sensor Excitation (Supply)



Analog channels: selectable 250μA or 2.5mA precision


current source, 4.5V voltage source, or switched external


General Purpose: Switchable 12V regulated supply for

powering sensors & accessories (max 150mA). Switchable

5V regulated supply for powering analog sensors (max



Analog Sensors



Supports a wide range of sensors including, but not limited


to, those listed below. A wide range of sensor scaling and

linearising facilities including polynomials, expressions

and functions.





Types: B, C, D, E, G, J, K, N, R, S, T


Calibration standard: ITS-90





Materials supported: Pt, Ni, Cu


Resistance range: 10Ω to 10KΩ





Types: YSI 400xx Series, other types*


Resistance range: <10kΩ**

* 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



Types supported: LM34 - 60, AD590, 592, TMPxx,


LM135, 235, 335


Strain Gauge and Bridge Sensors



Configurations: . , . & full bridge


Excitation: voltage or current


4-20mA Current Loop



Internal 100Ω shunt or external shunt resistor



Digital Channels


Digital Input/Outputs


4 bi-directional channels


Input Type: 4 logic level (max 20/30V)

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.


Low speed counters do not function in sleep mode.

Size: 32 bit

Max count rate: 10 Hz


Dedicated Counter Inputs



4 high speed inputs


Size: 32 bit

Max count rate: 100 kHz

Input type: 2 logic level inputs (max ・}30V), and 2

programmable inputs as either logic level inputs or

sensitive inputs (10mV) for magnetic pick-ups (max ・}10V)


Serial Channels




1 SDI-12 input shared with a digital channel


Supports up to 10 SDI-12 sensors.


Calculated Channels



Combine values from analog, digital and serial sensors


using expressions involving variables and functions.

Functions: An extensive range of Arithmetic,

Trigonometric, Relational, Logical and Statistical

functions are available.


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