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Grant Instruments Yoyo 2YL-M61-4M and 2YL-M62-4M

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The simple to use 2YL-M61-4M and 2YL-M62-4M Yoyo data loggers from Grant Instruments are designed to measure light levels with a 4 million readings standard memory.

The 2YL-M61-4M has one integrated sensor that accurately measures the luminocity range 0 to 4000 Lux.

The 2YL-M62-4M has three integrated sensors. One for humidity, one for temperature and one for luminocity. Similar to the 2YL-M61-4M the range is 0 to 4000 Lux.

Product Features

  • 2 model types
  • Range of accessories
  • Calibration options
  • Document downloads

Instrument product options

1. Select a model (2 available)

Continue to select accessories

2. Select accessories

3. Select a calibration



Standard delivery includes: 1 data logger, 1 standard battery, software YoyoView, USB cable, manual, and manufacturers declaration of conformity

Grant Instruments offers a range of Yoyo data loggers including versions for temperature, humidity, condensation, extra-low voltage, strain gauge, voltage, current, pulse, barometric pressure, as well as light and solar radiation. Please contact our sales team on 01344 459314 or sales@bis.fm if the version you require is not listed within the website.


Basic YoyoView software

The basic software, included with the logger is suitable for configuring the data logger, downloading and exporting basic data. All loggers are connected to a PC or laptop via a USB cable.

YoyoView Plus software

In addition to the functionalities of the basic software, the optional upgrade offers more complex analyses of data, charts and statistics.

  • Three scaleable Y-axes
  • Zoom function
  • Cursor readings
  • Display in spreadsheet format
  • Combination of a series of measurements in one chart
  • On-line metering
  • Statistical functions



Logger type 2YL-M61-4M

Ambient temperature operating range      - 40 to + 90 °C

Measuring range      0 to 40000 Lux

Accuracy      ± 20 % range

Inernal sensor resolution      1 Lux

Dimensions d x h      50 mm x 30 mm

Sensor type      Single channel Luminescence

Memory capacity (readings)      4 million

Interval      1 second to 24 hours

Housing      IP65

Battery type      Lithum (LITH-12)

Battery life      4 years @ 1 min. / 230 days @ 10 sec. / 25 days @ 1 sec

Logger type 2YL-M62-4m Specification as 2YL-M61-4M model except with the following additional features

Internal temperature range      - 40 to + 90 °C

Humidity sensor (internal & external) range/resolution      0 to100 % rh / 0 to 1 % rh

Sensor types      Single channel for Luminocity.  Integrated 1 x temperature, 1 x rh



Grant Yoyo logger data sheet

  • Technical Document
  • PDF file
  • 1 MB

Grant Yoyo logger user manual

  • Technical Document
  • PDF file
  • 1 MB

Grant YoyoGraph software user manual

  • Technical Document
  • PDF file
  • 1 MB
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