Grant CMK610-S

6 Channel Concrete Maturity Kit

  • Includes: OQ610 Temperature Data Logger with 6 Type K or T thermocouple inputs
  • Bright yellow, weatherproof, heavy duty case
  • USB connecting cable LC80
  • SquirrelView software
  • Fast sample rate – up to 8x per second
  • Automatic start/stop logging based on time or temperature



The CMK610-S Concrete Maturity Kit contains the Grant Squirrel OQ610-S data logger, a bright yellow, heavy-duty weatherproof case, and SquirrelView software.

The OQ610-S logger has 6 temperature channels and digitally displays the value of all channels, and comes with type K extension leads. It can be connected to a PC or laptop via USB interface for downloading readings.

To determine concrete maturity, temperature measurement cables are cast into the concrete and cut off at the surface when the concrete has cured. Concrete maturity is calculated from elapsed time versus temperature and is shown as a maturity number. The maturity number is then used to determine when the concrete has cured sufficiently for the cables to be removed.


Squirrel OQ-610 Technical Specifications

Accuracy -50 to 500°C – ± 0.5°C
-200 to 1300°C – ± 1.0°C
Resolution 0.1°
Sampling rate Fastest: eight times per second per channel
Slowest: once every two hours per channel
Channel 6 K or T type thermocouples
Temperature measuring range 200°C to 1300°C (K type)
-200°C to 400°C (T type)
Operating environment Temperature range -30 to 65°C
Humidity 95%
Memory Flash memory of 260,000 readings
Maximum runs stored 8
Communication USB 1.1 and 2.0 compatible
Display Alphanumeric display of 2 x 16 characters shows pass/fail, battery status, probes connected, real time
readings and communication to printer or P
Power supply Two AA cells to give 200 hours operation at default settings
Dimensions and weight (l x w x h), g 148 mm x 95 mm x 21 mm, 450


Case Specifications

Outside Dimensions 9.25″L x 7.56″ W x 4.38″ H
Weight 2.1 lbs.
Features IP67 rating, Dust / Sand Proof
Withstands temperatures -10 / 210°F
Handle (no wheels)
Pad lockable


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