Bluetooth Wireless for iPads and PC.  Versatile, cost-effective tool that is scientifically proven to improve test scores and help students develop a deeper understanding of science concepts.

Ease of use is critical for classroom tools.  If the teacher can’t figure out how to use it, the box will never be opened.  That’s why we have designed the V-Log4 and software to be very user friendly.


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Empowering educators worldwide, from schools and libraries to renowned institutes.

The future of education is here, and it fits right in the palm of your hand. Give your students the gift of engaging, interactive, and collaborative learning experiences with our SmartSchool Systems Microscope solutions. 

With over 50 different sensors for the V-Log4, real live data is at your fingertips.

The FREE EasySense PC and Mac software site license allows you to view, record and analyze data.

The V-Log 4 Bluetooth Datalogger can be used in multiple ways:

Stand alone-

Set up, View and Save data all from the V-Log4  (without a PC!)

V-Log4 is a full datalogger, offering all the features you would expect from a logger in the multi award winning EasySense range: general purpose classroom data logging, fast logging for Physics, long term recording for Biology & Environmental experiments and of course fully compatible with the SmartQ Sensor range.

V-Log4 has a large user memory for storing data files. Captured data can be transferred to a PC by direct USB connection.

With a PC-

Connect V-Log4 to a PC, and you can:

  • Use V-Log4 as an interface, control V-Log4 from the PC.
  • View real-time data collection. Great for whole class demonstrations
  • Data captured on V-Log4 can be transferred to the PC and opened directly into PC EasySense software

​With a Mac-

Connect V-Log4 to a Mac, and you can:

  • Use V-Log4 as an interface, control V-Log4 from the computer.
  • View real-time data collection.  Great for whole class demonstrations​

​With a Chromebook-

Connect V-Log4 to a Chromebook, and you can:

  • Use V-Log4 as an interface, control V-Log4 from the computer.
  • View real-time data collection.  Great for whole class demonstrations​

​With an iPad, iPhone or Android device-

Connect V-Log4 wirelessly with Bluetooth, and you can:

  • Use V-Log4 as an interface, control V-Log4 from the mobile device.
  • View real-time data collection.  Great for whole class demonstrations​


  • 4 SmartQ sensor inputs
  • Large graphical display
  • Remotely record data (14 days)
  • Snapshot logging mode
  • Pictogram and Meter modes
  • Fast logging mode (up to 50,000 samples a second)
  • Accurate digital timing mode
  • Multiple stored data sets
  • USB Connectivity
  • Bluetooth Connectivity
  • Built-in battery USB rechargeable
  • Free EasySense software (PC & Mac)
  • Storage case and cables ​

1x (2404A) V-Log4 USB and Bluetooth
1x (3021) USB Lead
2x (3004) Short Sensor Leads – 150 mm
2x (3005) Long Sensor Leads – 1.5 m
1x (2490) Gratnell SmartCase Storage Case
Free Download EasySense Software

Datalogger Technical Specification:

LCD: Graphical

Sensor Inputs (Plug-in): 4

Timing Inputs A & B: Yes

Analogue Resolution: 12-Bit

Fastest Logging Speed: 50,000 samples per second

Digital Timing Accuracy: 4 microseconds

Rechargeable Batteries: Yes

USB Client (to PC): Yes

Firmware Upgradeable: Yes

USB Connection to:

Windows XP or later

Apple Mac OS 10.8 or higher


Bluetooth Connection to:

Windows XP or later

iPad, iPhone and Android devices

More about the Gratnells SmartCaseTM

  • Moulded handle for storage on the go
  • All cases come with a one year guarantee
  • Compatible with all school furniture
  • Made in the UK
  • Ideal storage for all school kits including outdoor, science and maths – both for primary and secondary levels.
  • Easy to transport, stackable and water resistant – making it perfect for outdoor education, especially field work including data logging.
  • Lightweight design ensures SmartCaseTM is suitable for all ages.