Multi loggers 2YL-M36-4M 2YL-M37-4M 2YL-M61-4M 2YL-M62-4M 2YL-M90-4M 2YL-M90E-4M 2YL-M91-4M
Grant YL-M37-4M
2YL-M37-4M Multi Terminal Input Logger

Flexible input logger with terminal blocks for two external sensors types PT100/1000, T/C, voltage, current, digital RH/T, soil moisture. Input for Strain Gauge sensors.4 Million readings, measuring range -40 to +90ºC, IP65 rated.

Supplied with YoyoLog View software, USB lead and long life battery.

Key Features
• Plugs included to connect 1 or 2 sensors
• Status LED: - Indicates Alarm - Low Battery Warning
• Works with many standard sensors - configurable
• 2YL-T37-4M: - Strain Gauge - Logger can supply a high precision constant current

Download Brochure HERE

Dimensions (d x h) 50 x 33mm
Ambient temperature range -40 to +90ºC
Internal sensor resolution 0.01K
Memory capacity (readings) 4 million
Active start
Sensor type Flexible Input Terminals - All Sensors + Strain Gauge
Intervals 1 second to 24 hours
IP rating 40
Battery type LITH-12

Battery life (Logging Speed)
1 minute

4 years

10 seconds

230 days
1 second 25 days
Robust, shock proof

Supplied with YoyoLog View software, USB lead and long life battery.

Input ranges
Range 0 to 1V 0 to 2.5V 0 to 5V 0 to 10V 0 to 24mA
Resolution µV * 15.4 38.9 76.9 154 0.36µA
Input impendance Mohm 0.1 0.1 0.1 0.1 10 Ohmshunt

* input ranges can be measured at 32 Hz. At 32 Hz the maximum resolution is ten times of the above value.
Note: A YY-CU cable with integrated potential divider is required in order to connect voltage signals. Current signals require the YY-CI cable.


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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)




Note: Optional Extras include - YoyoView Software, Calibration Certificate, Wall holder, Lead Seal Kit, Probes and Accessories.


Test and measurement  Uptime monitoring of harbour cranes, photovoltaic systems. Recording on-board voltage of a racing car or helicopter. All kinds of analogue signals from sensors/transducers.


Measure AC current with current clamps


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