Datataker Comparison

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Analog Channels

A basic concept of the dataTaker data logger is that analog inputs can be used with more than one type of sensor, without needing additional input modules.

The dataTaker "analog channel" is a group of 4 terminals that can be used in many combinations.

DT80 has five   4 wire (4 terminal) channels,
DT81 has one        "
DT85 has sixteen   "

These allow sensors and signals based on voltage, current, resistance and frequency to be measured.
These are the fundamental signals output by most sensors.
It is not necessary to use all four terminals on each channel.

Each of these analog channels can be connected to between 1 and 3 sensors or signals, depending on the requirements of that sensor or signal type.

Refer to the user manual for detailed connection information.

FAQ on DT80, DT81 & DT85 (and G versions) (opens new tab or window)

The DT81 has been discontinued, in favour of the new DT82E Environmental logger.

Datataker Comparison

Fast logger



DT800

DT80

DT82E

DT85

DT80G has Vibrating Wire Sensor Support

DT85G has Vibrating Wire Sensor Support

Analog Channels:
Differential
    (4-wire, double-ended)

12

5
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.
The following maximums apply: Two wire with common reference terminal: 6
Two wire isolated: 4
Three and four wire isolated: 2

16

Expandable to
   * Expansion requires CEM20

100 *

300 *

NOTE: The DT80, DT81, and the DT85 loggers have different characteristics related to isolation.
They use "Dual channel" isolation technology to allow two isolated two wire inputs on the same channel
as well as disconnecting AGND (EXT#) when not in use.



DT800

DT80

DT82E

DT85

2-wire isolated (see note above),
expandable to

24
not expandable

10
expandable to 200 *

4
not expandable

32
expandable to 600 *

Single Ended (ground ref)
with one shared terminal

42

15
(with no differential)

6
(with no differential)

48
(with no differential)

Analog Input Expandable
* Expansion requires CEM20

No

Yes, to 300 *

No expansion

Yes, to 800 *

Multiplexer Type:
SS (Solid State) or Relay Contacts

SS

Relay

Relay

Relay

Analog Input Range

±13 VAC / VDC

±30V

±30V

±30V

Overall range is ±30Vdc, however
the default range for most measurement types is <±3Vdc.
The higher ±30Vdc range is only available if the internal attenuation is on.
By default all channel types except HV (high voltage) and AS (analog state) channel types have attenuation off.

Overvoltage protection

±40V
Lightning protection: secondary, via ±30V varistors

+/- 35 VDC

+/- 35 VDC

+/- 35 VDC

Common Mode Range

±13V or
–2V to 22V selectable

±3.5V or
±35V on 30V range

±3.5V or
±35V on 30V range

±3.5V or
±35V on 30V range

Max Samples per second (analog)

200 Sa/sec
Burst mode: 100kSa/sec

25 Sa/sec

25 Sa/sec

25 Sa/sec

Built-in Data Points Storage

130,000 expandable
dual battery backed SRAM

10 million
also has USB memory stick support

10 million

10 million



DT800

DT80

DT82E

DT85

Digital & Counter Inputs

16

8 bi-directional channels, as follows:
   Input Type:
      8 logic level (max 20/30V)
   Output Type:
      4 with open drain
               FET(max: 30V, 100mA),
      4 with logic output.
Relay Output: 1 latching relay,
         contacts (max: 30Vdc, 1A)

4 bi-directional channels, as follows:
   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)

12
Counter Channels
Low Speed Counters
8 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 or 2 phase encoder (quadrature) inputs, size: 32 bit Max Count rate: 10 kHz
Input type: 2 logic level inputs (max ±30V),
2 sensitive inputs (10mV) for magnetic pick-ups (max ±10V)

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: 10 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)

DT800

DT80

DT82E

DT85

SDI-12   SDI-12 Info
  (Serial Data Interface at 1200 bps)

Yes

4 SDI-12 inputs, shared with digital channels. Each input can support multiple SDI-12 sensors.

1 SDI-12 input, shared with a digital channel
up to 10 SDI-12 sensors

Yes (multiple networks), shared with digital channel

Serial Sensor Channel RS232

1

2

1

2

Isolated Communications with host computer

An RS232 port, 300 to 115200 baud, a
10baseT Ethernet port and a
PC card port are provided for dataTaker programming and data retrieval.

Host RS232 Port, Speed: 300 to 115200 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), Modbus, Serial Sensor

Generic Serial Sensor
Flexible options to allow data to be logged from a wide range of smart sensors and data streams. Available ports:
Serial Sensor Port (RS232, RS422, RS485) or
Host RS232 Port*
Baud rate: 300 to 115,200 *If used as a Serial Sensor channel then the Host Port is not available for other communications.
Generic Serial Sensor
Flexible options to allow data to be logged from a wide range of smart sensors and data streams.
Available ports: Host RS232 Port*
Baud rate: 300 to 115,200
*If used as a Serial Sensor channel then the Host Port
is not available for other communications

USB Port Interface: USB 1.1     (virtual COM port)
   Protocol: ASCII command
No
Yes
No
Yes
Ethernet Port
10BaseT Protocols: TCP/IP (UDP, FTP)
10BaseT (10Mbps) Protocol: TCP/IP

Web Interface
FTP for automatic data transfer
Modbus for SCADA connection

Yes

Web Server
Access current data and status from any web browser.
Custom HTML pages can be defined.
Download data in CSV format.
Command interface window.
Define mimic displays.
FTP Client
Automatically upload logged data direct to an FTP server.
Modbus Server (Slave)
Access current data and status from any Modbus client
(e.g. SCADA system)

Yes

Display built in

No

Yes

LCD, 2 line by 16 characters, backlight.
Display Functions: channel data, alarms, system status.
Keypad: 6 keys for scrolling and function execution.
Status LEDs: 4 for sample, disk, attention and power.

Yes

Panel Mount Display option

No

No

No

No

Resolution:
(15-bit gives 1µV)

14 to 18 bits

18 bit

18 bit

18 bit

Volts. Current, 4-20ma, Resistance

Yes

Yes

Yes

Yes

Frequency, Period

Yes

Yes

Yes

Yes

Thermocouple support
Types: B, C, D, E, G, J, K, N, R, S, T
Calibration standard: ITS-90

11 types

11 types

11 types

11 types

RTD support (Pt, Cu, Ni)

Yes

Yes

Yes

Yes

Bridges, Strain Gauge support

Yes

Yes

Yes

Yes

Thermistor Arrays:
    YSI 400xx Series
* Resistance range: <10kohms, <20kohms with parallel resistor

Yes *

Yes.
Other thermistor types are supported by thermistor scaling and calculated channels.
Resistance range: <10kohms **
**Resistance range can a parallel resistor.

Vibrating Wire support

No

DT80G has Vibrating Wire Sensor Support

No

DT85G has Vibrating Wire Sensor Support

DT800

DT80

DT82E

DT85

Digital channels Input/Output shared

8 shared I/O
2 of which have 10mV sensitive inputs for magnetic pick-ups

8 shared I/O
1 latching relay

4 shared I/O

8 shared I/O
1 latching relay

Digital Inputs, not shared, logic levl

8

Digital Output Ch types

8 shared with bi-directional channels, open-drain FET, +30V, 100mA

4 open drain FET,
4 with logic output

3 open drain FET,
1 with logic output

4 open drain FET,
4 with logic output

Relay output, latching,
   contacts (max: 30Vdc, 1A)

No

1 relay contact

1 relay contact

1 relay contact

Counters, slow (<10Hz)

14

8 shared with DI

4 shared with DI

8 shared with DI

Counters:
   high speed or phase encoders

2

4   or   2

4   or   1

4   or   2

Counter Input Ch types
Size: 32 bit (>4,000,000,000 counts)

16, shared with digital I/O channels Speed: Channels 1- 6 100Hz (3Hz in Sleep Mode) Channels 7- 8 10kHz (1kHz in Sleep Mode) Channels 9-16 100Hz (3Hz in Sleep Mode)

2 logic level inputs
(max ±30V),
2 sensitive inputs (10mV) for magnetic pick-ups
(max ±10V)

2 logic level inputs
(max ±30V),
2 sensitive inputs (10mV) for magnetic pick-ups
(max ±10V)

2 logic level inputs
(max ±30V),
2 sensitive inputs (10mV) for magnetic pick-ups
(max ±10V)

Counter Channel Expansion

No

No

No

No

Supports Datataker network (older models DT50, DT500, etc, have this)

No

No

No

No

Internal Battery

12V (2.2AHr) lead acid gel cell

6VDC (1.2AH)

6VDC (1.2AH)

6VDC (4AH)

Dimensions

260 x 110 x 90mm

180 x 137 x 65mm

180 x 137 x 65mm

300 x 137 x 65mm

DT800

DT80

DT82E

DT85

Datataker Comparison	Fast logger
	DT800	DT80	DT82E	DT85
		DT80G has Vibrating Wire Sensor Support		DT85G has Vibrating Wire Sensor Support
Analog Channels: Differential (4-wire, double-ended)	12	5	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. The following maximums apply: Two wire with common reference terminal: 6 Two wire isolated: 4 Three and four wire isolated: 2	16
Expandable to * Expansion requires CEM20		100 *		300 *
NOTE: The DT80, DT81, and the DT85 loggers have different characteristics related to isolation. They use "Dual channel" isolation technology to allow two isolated two wire inputs on the same channel as well as disconnecting AGND (EXT#) when not in use.
	DT800	DT80	DT82E	DT85
2-wire isolated (see note above), expandable to	24 not expandable	10 expandable to 200 *	4 not expandable	32 expandable to 600 *
Single Ended (ground ref) with one shared terminal	42	15 (with no differential)	6 (with no differential)	48 (with no differential)
Analog Input Expandable * Expansion requires CEM20	No	Yes, to 300 *	No expansion	Yes, to 800 *
Multiplexer Type: SS (Solid State) or Relay Contacts	SS	Relay	Relay	Relay
Analog Input Range	±13 VAC / VDC	±30V	±30V	±30V
		Overall range is ±30Vdc, however the default range for most measurement types is <±3Vdc. The higher ±30Vdc range is only available if the internal attenuation is on. By default all channel types except HV (high voltage) and AS (analog state) channel types have attenuation off.
Overvoltage protection	±40V Lightning protection: secondary, via ±30V varistors	+/- 35 VDC	+/- 35 VDC	+/- 35 VDC
Common Mode Range	±13V or –2V to 22V selectable	±3.5V or ±35V on 30V range	±3.5V or ±35V on 30V range	±3.5V or ±35V on 30V range
Max Samples per second (analog)	200 Sa/sec Burst mode: 100kSa/sec	25 Sa/sec	25 Sa/sec	25 Sa/sec
Built-in Data Points Storage	130,000 expandable dual battery backed SRAM	10 million also has USB memory stick support	10 million	10 million
	DT800	DT80	DT82E	DT85
Digital & Counter Inputs	16	8 bi-directional channels, as follows: Input Type: 8 logic level (max 20/30V) Output Type: 4 with open drain FET(max: 30V, 100mA), 4 with logic output. Relay Output: 1 latching relay, contacts (max: 30Vdc, 1A)	4 bi-directional channels, as follows: 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)	12
Counter Channels		Low Speed Counters 8 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 or 2 phase encoder (quadrature) inputs, size: 32 bit Max Count rate: 10 kHz Input type: 2 logic level inputs (max ±30V), 2 sensitive inputs (10mV) for magnetic pick-ups (max ±10V)	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: 10 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)
	DT800	DT80	DT82E	DT85
SDI-12 SDI-12 Info (Serial Data Interface at 1200 bps)	Yes	4 SDI-12 inputs, shared with digital channels. Each input can support multiple SDI-12 sensors.	1 SDI-12 input, shared with a digital channel up to 10 SDI-12 sensors	Yes (multiple networks), shared with digital channel
Serial Sensor Channel RS232	1	2	1	2
Isolated Communications with host computer	An RS232 port, 300 to 115200 baud, a 10baseT Ethernet port and a PC card port are provided for dataTaker programming and data retrieval.	Host RS232 Port, Speed: 300 to 115200 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), Modbus, Serial Sensor
		Generic Serial Sensor Flexible options to allow data to be logged from a wide range of smart sensors and data streams. Available ports: Serial Sensor Port (RS232, RS422, RS485) or Host RS232 Port* Baud rate: 300 to 115,200 *If used as a Serial Sensor channel then the Host Port is not available for other communications.	Generic Serial Sensor Flexible options to allow data to be logged from a wide range of smart sensors and data streams. Available ports: Host RS232 Port* Baud rate: 300 to 115,200 *If used as a Serial Sensor channel then the Host Port is not available for other communications
USB Port Interface: USB 1.1 (virtual COM port) Protocol: ASCII command	No	Yes	No	Yes
Ethernet Port	10BaseT Protocols: TCP/IP (UDP, FTP)		10BaseT (10Mbps) Protocol: TCP/IP
Web Interface FTP for automatic data transfer Modbus for SCADA connection		Yes	Web Server Access current data and status from any web browser. Custom HTML pages can be defined. Download data in CSV format. Command interface window. Define mimic displays. FTP Client Automatically upload logged data direct to an FTP server. Modbus Server (Slave) Access current data and status from any Modbus client (e.g. SCADA system)	Yes
Display built in	No	Yes	LCD, 2 line by 16 characters, backlight. Display Functions: channel data, alarms, system status. Keypad: 6 keys for scrolling and function execution. Status LEDs: 4 for sample, disk, attention and power.	Yes
Panel Mount Display option	No	No	No	No
Resolution: (15-bit gives 1µV)	14 to 18 bits	18 bit	18 bit	18 bit
Volts. Current, 4-20ma, Resistance	Yes	Yes	Yes	Yes
Frequency, Period	Yes	Yes	Yes	Yes
Thermocouple support Types: B, C, D, E, G, J, K, N, R, S, T Calibration standard: ITS-90	11 types	11 types	11 types	11 types
RTD support (Pt, Cu, Ni)	Yes	Yes	Yes	Yes
Bridges, Strain Gauge support	Yes	Yes	Yes	Yes
Thermistor Arrays: YSI 400xx Series * Resistance range: <10kohms, <20kohms with parallel resistor	Yes *	Yes. Other thermistor types are supported by thermistor scaling and calculated channels. Resistance range: <10kohms Resistance range can a parallel resistor.
Vibrating Wire support	No	DT80G has Vibrating Wire Sensor Support	No	DT85G has Vibrating Wire Sensor Support
	DT800	DT80	DT82E	DT85
Digital channels Input/Output shared	8 shared I/O 2 of which have 10mV sensitive inputs for magnetic pick-ups	8 shared I/O 1 latching relay	4 shared I/O	8 shared I/O 1 latching relay
Digital Inputs, not shared, logic levl	8
Digital Output Ch types	8 shared with bi-directional channels, open-drain FET, +30V, 100mA	4 open drain FET, 4 with logic output	3 open drain FET, 1 with logic output	4 open drain FET, 4 with logic output
Relay output, latching, contacts (max: 30Vdc, 1A)	No	1 relay contact	1 relay contact	1 relay contact
Counters, slow (<10Hz)	14	8 shared with DI	4 shared with DI	8 shared with DI
Counters: high speed or phase encoders	2	4 or 2	4 or 1	4 or 2
Counter Input Ch types Size: 32 bit (>4,000,000,000 counts)	16, shared with digital I/O channels Speed: Channels 1- 6 100Hz (3Hz in Sleep Mode) Channels 7- 8 10kHz (1kHz in Sleep Mode) Channels 9-16 100Hz (3Hz in Sleep Mode)	2 logic level inputs (max ±30V), 2 sensitive inputs (10mV) for magnetic pick-ups (max ±10V)	2 logic level inputs (max ±30V), 2 sensitive inputs (10mV) for magnetic pick-ups (max ±10V)	2 logic level inputs (max ±30V), 2 sensitive inputs (10mV) for magnetic pick-ups (max ±10V)
Counter Channel Expansion	No	No	No	No
Supports Datataker network (older models DT50, DT500, etc, have this)	No	No	No	No
Internal Battery	12V (2.2AHr) lead acid gel cell	6VDC (1.2AH)	6VDC (1.2AH)	6VDC (4AH)
Dimensions	260 x 110 x 90mm	180 x 137 x 65mm	180 x 137 x 65mm	300 x 137 x 65mm
	DT800	DT80	DT82E	DT85