YL-M32 MicroV Log
2 x ext sensor
YL-M33/M34 V&C
1-2 x ext channels
YL-M41/42 Pulse Log
1 or 2 x ext channels
YL-M61 LuxLog
1 x int sensors
YL-M62 Lux/RH/Temp
3 x int sensors
YL-M90 MultiLog
1 x int 2 x ext sensors
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Three integrated sensors. One for humidity, one for temperature and one for luminocity.
Its spectral sensitivity is adjusted to that of the human eye

Download Brochure HERE

YL-M62 Lux/RH/Temp Log with 2 internal channels
Upgraded Memory Humidity Logger YL-M62-4M
Temperature operating range with
CR2477N battery
-30 to +70°C
Temperature operating range with
CR2450HT battery
-40...+90°C *
Internal temperature range / resolution -40 to +90°C / 0.001K
Humidity sensor (internal & external) range/resolution 0..100%rh / 0.01%rh
Measuring range Light 0 to 40000 Lux
Dimensions d x h (mm) 50/33
Standard memory capacity/Upgraded memory capacity 100,000 readings/ 4 million readings
Interval 1 sec to 24h
Enclosure Robust, shock-proof POM, protection class IP65
Standard lithium battery life 4 years @ 1 min / 230 days @ 10 sec / 25 days @ 1 sec

Included in delivery: Data logger, 1 standard battery, Software YoyoView, USB cable, manual, declaration of conformity

* Using the logger within the extended temperature operating range requires the use of the CR2450HT battery.

Specs YY internal 20_23_25_61_90.jpg

Specs YY external T 20_23_25_61_90.jpg

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Wall Holder Enables you to securely install the logger onto walls. Complete with tamper-evident lead seal.

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Lead seal kit For Temperatue and Humidity LoggersContains 50 pieces of wire and 50 numbered lead tamper-evident seals for single use. These are manually closed around the wire and can only be released by cutting.


YoyoView Software In addition to the functionalities of the included basic software, the optional upgrade allows more complex analysis of data, creation of charts and calculation of data statistics.
» Three scaleable Y-axes
» Zoom function
» Cursor readings
» Display in spreadsheet format
» Combination of a series of measurements in one chart
» Definition of thresholds
» Y/T-charts (values over time)
» Statistics (min, max, and average values)
» Online metering (display actual values)