Grant SQ2020-2F8

High Performance 8/16 Channel Portable, Universal Input Data Logger with Ethernet

  • 8 to 16 universal analog plus 8 digital inputs
  • Up to 16 derived /calculated channels
  • 4 alarm outputs
  • 4 pulse rate / counter inputs (2 at up to 64kHz, 2 at up to 100Hz)
  • Configured via integral interface or via PC
  • 0.05% basic accuracy
  • Up to 14 million readings
  • Removable MMC / SD card
  • In-built Ethernet networking capability
  • USB and RS232 connectivity



SQ2020-2F8 Portable Universal Input Data Logger – Powerful data loggers for standard and high-speed applications

The SQ2020-2F8 Portable Universal Input Data Logger has up to 100 readings per second on 2 channels

In-built Ethernet connectivity

Up to four 3 or 4 wire Pt 100/1000 sensor inputs

  • Fully configurable via the integrated keypad
  • Graphical LCD display
  • Compatible with J,K,T,N,R,S,B,C,D type thermocouples
  • Up to 16 universal inputs
  • High precision (0.05%)
  • Advanced data management to MMC/SD card or PC
  • Flexible communications (USB, Ethernet, RS232)
  • High speed option (100Hz)
  • Various Remote connection options e.g. via Ethernet or dial up modem

The Grant Squirrel 2020 series offers high-performance universal data loggers packed with powerful features to provide great flexibility to handle a wide range of routine and demanding applications.

Hand-held and lightweight, the Squirrel 2020 models are easy, fast and convenient to use – either as stand-alone loggers or as PC-linked data acquisition systems in industrial and scientific research and quality assurance applications.

Twin processors, multiple 24-bit analog-to-digital converters, up to 16 universal channels and a choice of communications methods ensure that the Squirrel 2020 series provides state-of-the-art data logging and communication capability for sophisticated applications needs.

Key Features

  • Standalone data logger or link to a PC
  • Compact and portable
  • 8 to 16 universal analog plus 8 digital inputs
  • Up to 16 derived /calculated channels
  • 4 alarm outputs
  • 4 pulse rate/counter inputs (2 at up to 64kHz, 2 at up to 100Hz)
  • Configured via integral interface or via PC
  • 0.05% basic accuracy
  • Up to 14 million readings
  • Removable MMC / SD card
  • In-built Ethernet networking capability (SQ2020-2F8 only)
  • USB and RS232 connectivity

Analog inputs supported:

  • Thermistors
  • Thermocouples
  • Pt100/Pt1000 (maximum of four 3 or 4-wire Pt100/1000 sensors)
  • Voltage
  • Current
  • Resistance


Analog input channel options Analog to digital converters: 1
Differential: 8
Single Ended*: 16
3 or 4 wire: 0
Additional channels
* Please refer to our Technical Note for
the configuration of these inputs
Pulse: (2 x fast-64kHz)& (2 x slow – 100Hz)
Event/digital: 8 state inputs or 1 x 8 bit binary
Single Ended*: 2
3 or 4 wire: 1 temperature
Logging speed 20 readings / sec on 1 channel
Communication Standard:RS232 ( Auto bauding to 115200 baud)
USB 1.1 & 2.0 compatible
External options: GSM, Wifi and PSTN Modems
Analog inputs Accuracy: (at 25°C) voltage and resistance (± 0.05% readings + 0.025% range)
Common mode rejection: 100dB
Linearity: 0.015%
Input impedance: > 1MO
Series mode line rejection: 50/60Hz 100dB
Analog – digital conversion Type: Sigma – Delta
Resolution: 24bit
Sampling rate: up to 10, 20* or 100* readings per sec. per ADC. No 100Hz on 1F8
(* with mains rejection off)
Thermistor Ranges Y & U-type: – 50 to 150°C
Pt100/ Pt1000: – 200 to – 850°C (2 wire only on 1F8)
Customer specific thermistor range
Thermocouple Ranges;
Differential and Single Ended
K-type: – 200 to 1372°C
R-type: – 50 to 1768°C
B-type: 250 to 1820°C
T-type: – 200 to 400°C
S-type: – 50 to 1768°C
C-type: 0 to 2320°C
N-type: – 200 to 1300°C
J-type: -200 to 1200°C
D-type: 0 to 2320°C
Working environment – 30 to 65°C, RH up to 95% (non-condensing
Voltage Ranges;
Differential and Single Ended
– 0.075 to 0.075V, – 0.15 to 0.15V, – 0.3 to 0.3V, – 0.6 to 0.6V, 0.6 to 1.2V, 0.6 to 2.4V, – 3.0 to 3.0V,
– 6.0 to 6.0 V, -6.0 to 12.0V, – 6.0 to 25.0V
High voltage input range 4.0 to 20.0V, 4.0 to 40.0V, 4.0 to 60.0 (max 2 may be selected)
Current Ranges, Differential
(Requires external 10O shunt)
-30.0 to 30.0mA, 4 to 20mA
Resistance Ranges, all 2 wire 0.0 to 1250O, 0.0 to 5000O, 0.0 to 20000O, 0.0 to 300000O
Resistance range 3 and 4 wire (2F8) 0.0 to 500O, 0.0 to 4000O
Digital/Alarm Output 4 open drain FET (18V 0.1A)
Memory Internal: up tp 128M(up to 14 million readings)
External: Up to 1Gb – removable MMC/ SD ( for transferring internal memory
and storing setups only
Internal memory modes Stop when full or overwrite
Calculated channel Up to 16 virtual channels derived from physical input channels
Resolution Up to 6 significant digits
Display/Keypad 128*64 dot graphical display,4 button keypad
Power supply Internal: 6 x AA alkaline batteries
External: 10-18VDC. Reverse and polarity and over-voltage protected
Power consumption@ 9V Sleep mode: 600µA
Logging: 40 – 80 mA
Power output for external device Regulated 5VDC at 50mA or logger supply voltage at 100m
Time and Date In-built clock in 3 formats
Programming / logger setup Squirrelview or Squirrelview Plus Software
Dimensions (w x d x h), weight 235 mm x 175 mm x 55 mm, 1.2 kg, enclosure material ABS

Please note: SQ2020 is supplied with software, manual, USB cable, wall bracket, batteries and 4 current shunt resistors.


SquirrelView Software

Key features of SquirrelView

  • Export data into Excel or as a CSV file for customisable data analysis
  • Easily view and control the logger status from one single screen
  • Use the simple communication wizard for hassle free working with modems, Ethernet, GSM, etc.
  • Download data by date, time or events, saving time when working via modem or looking for specific data
  • Save settings on the PC for efficient re-use
  • Protect your data and set-up configurations with the security function

For full analysis and reporting facilities SquirrelView Plus is available as an add-on option (a free 30-day trial is included with the SquirrelView software).

Minimum PC specification

Windows® 2000, XP; Pentium II 266MHz, 60Gb HDD, colour SVGA screen, at least one RS232 or one USB port.

SquirrelView Plus Software

SquirrelView Plus has all the features of SquirrelView with the additional benefits of allowing graphical analysis of historical and on-line data, whilst providing advanced reporting options.

SquirrelView Plus allows quick and easily analysis of the Squirrel data in a familiar Explorer navigation-style interface.

Data can be displayed with two different auto scaling Y-axes ─ essential for displaying widely varying data from different sensors on one graph. Particular data of interest can be zoomed into whilst an on-screen cursor can pick out exact values. Data can be shown in a statistical summary with set high and low alarm thresholds. The powerful calculation function allows the creation of “virtual” new channels from existing channels e.g. value from channel 1 added to the average of 10 readings from channel 2 etc.

SquirrelView Plus also incorporates a flexible report generation facility which allows the creation of custom report consisting of a title page with descriptive text, headers and footers, graphs, tabular lists of data, statistics and Squirrel logger set-up information. These can be saved as templates with any of these combinations saving time when preparing similar presentations of data.

Key features

  • Flexible data presentation allows you to quickly display and analyse real time or historical data as a line graph, bar chart or analogue gauge
  • Graphical alarm and event identification lets you easily identify occurrences around specific analogue or digital events, e.g. a pump switching on
  • Quick Graph function lets you quickly and easily view large data files
  • Wizards for easy set-up of communications and data export
  • Ability to send real time metered data from the Squirrel directly into Excel
  • Downloader for automating data download using MS Scheduler® (Squirrel 2010, 2020 and 2040 only).
  • Fully configurable data views
  • Flexible zoom feature including X and Y axes
  • Customisable report facility: print out graphs, readings, etc.
  • Tolerance curve
  • Calculated channels
  • Product cure calculation
  • Display oven profiles and oven zones