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
1xint 2 x ext sensors
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M41-and -M42

One or two external input channel.
Designed to measure potential-free pulses such as TTL signals or voltage signals of up to 3V.
With the YY-CP connection cable the logger can measure signals up to 24V.
The logger can also be integrated into the aerodynamic rain gauge YY-RG.
The logger is programmable, allowing logging on one or two channels simultaneously. 

Download Brochure HERE

  YL-M41 pulse Log
1 x external pulse channel
YL-M42 pulse Log
2 x external pulse channels
Upgraded Memory Humidity Logger YL-M33-4M YL-M34-4M
Temperature operating range with
CR2477N battery
-30 to +70°C
Temperature operating range with
CR2450HT battery
-40...+90°C *
Cable YY-CS for pulses <3volts
YY-CP for pulses between 5 and 24volts
Measuring pulses (potential free) /range/resolution 0 to 65000 pulses, interval of 0 to 100 pulses/second 1Hz/1 pulse
Voltage pulses/range/resolution 0 to 65000 pulses, interval 0 to 1300Hz 1Hz/1 pulse
Signal input Potential-free signals or low level pulses <0.5 Vdc and high level between 2 and 3Vdc can be processed with the YY-CS cable.**
Dimensions d x h (mm) 50/30
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, YY-CS connection cable

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

** Higher voltage levels up to 24Volts require the YY-CP cable.


YY-CS Connection cable for pulse inputs of less than 3V


YY-CP Connection cable for pulse inputs between 5V and 24V.

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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 Loggers contains 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)




Test and measurement 

Uptime monitoring of harbour cranes, photovoltaic systems. Tyre manufacturing, raingauge, water supply counte


Weather monitoring

Monitoring outside temperature / humidity and via connected sensors also soil moisture and  rainfall