Grant SQ2040-2F16-WiFi

16/32 Channel Portable, Universal Input Data Logger with WiFi

  • 16 true differential or 32 single ended universal analog inputs for voltage, current or resistance measurements plus 2 high voltages, 4 pulse and 8 digital event/state inputs
  • Analog inputs can be used with thermistors, thermocouples, 2,3 or 4 wire RTD temperature sensors and 4 – 20mA signals
  • User selectable logging rates of up to 100Hz on up to four channels
  • Standard (802.11b) wireless (Wi-Fi) Ethernet networking, USB and RS232 communication ports
  • Large non-volatile internal memory storage for up to 14 million readings
  • Download of internal data to removable MMC/SD (Multi Media Card / Secure Digital) memory card
  • Sensor power and FET outputs for use with external devices
  • Easy to read LCD and simple 4 button user interface
  • Calculated channels derived from real channels using advanced mathematical functions e.g. log(x); ln(x); sqrt(x)

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


SQ2040-2F16-WiFi Portable Universal Input Data Logger – High-performance wireless data loggers for demanding applications

The SQ2040-2F16-WiFi Portable Universal Input Data Logger has up to 100 readings per second on 2 channels; Two 24-bit A to D converters

  • Fully configurable via the integrated keypad
  • Graphical LCD display
  • Compatible with B, C, D type thermocouples
  • Integral Wi-Fi Ethernet networking
  • High precision (0.05%)
  • Advanced data management, to MMC/SD or PC
  • Flexible communications (USB, Ethernet, RS232)
  • High-speed option (100Hz on 4 channels)
  • Various Remote connection options e.g. via Ethernet or dial-up modem

The Grant Squirrel SQ2040 Wi-Fi series combines a high channel, high performance, universal inputs with the simplicity of Wi-Fi networking in a compact and portable instrument.

Using multiple 24-bit analog to digital converters, twin processors and removable memory and Wi-Fi networking the SQ2040 Wi-Fi provides great flexibility to handle a wide range of complex and demanding multi-channel applications. The Squirrel SQ2040 Wi-Fi series is ideal for industrial, scientific research and quality assurance applications. The SQ2040 Wi-FI provides standalone data acquisition, advanced networked solutions, and data analysis straight out-of-the-box.

Analog inputs supported:

  • Thermistors
  • Thermocouples
  • Pt100/Pt1000 (maximum of eight 3- or 4-wire Pt100/1000 sensors – model 4F16 only)
  • Voltage
  • Current
  • Resistance


Analog input channel options Analog to digital converters: 2
Differential: 16
Single Ended*: 32
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: 2 temperature
Logging speed: 1 sec to 1 day in 1 sec
Increments: or 100Hz (20Hz or 100Hz only on 2 channels)
Logging speed 100 readings / sec on 2 channel
Communication Standard: Wireless Ethernet ( Wi-Fi): 802.11b, 2.4GHz, 1 to 14 channels.
Security: Open, WEP(64 or128bi encryption), WPA orWPA2/ 802.11i.
Network: Infrastructure only with specified SSID( external mains power
required for Wi-Fi connection)
RS232 ( Auto bauding to 115200 baud)
USB 1.1 & 2.0 compatible
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 95 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.



1. 16 to 32 universal analog inputs for recording temperature, current, voltage and resistance
2. Easy to use, removable connector system
3. Power output for sensor excitation / external devices
4. 2 high voltage channels (20, 40 or 60V) for automotive applications
5. USB, Wireless Ethernet and RS232 connectivity for quick and easy PC and remote communication and networking
6. Range of trigger functions via 8 digital inputs; 4 pulse rate / counter inputs; 4 alarm outputs for triggering external devices
7. Power supply – internal alkaline batteries or external DC power supply


1. To operate the logger simply use the four integral push buttons and display, or use the convenient SquirrelView set-up, download and export software – free with every Squirrel logger
2. Large, clear 128*64 dot graphical LCD screen for easy access to readings and set-up information
3. Robust, ergonomically designed case with easy access to all user facilities

  • Store up to 1.8 million readings in the Squirrel’s on board memory
  • Store up to 6 logger configurations. Load from a removable MMC / SD card for speed and convenience,or download data files to the card


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