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SENSORS FOR WEATHER STATIONS
DRT27 LTE IoT dendrometer with LTE modem for trunk growth monitoring
Non-invasive dendrometer with integrated LTE modem for online trunk circumference increment measurement with sub-micrometer resolution.
Built for long-term deployments, low maintenance and remote data visualization on EMScloud.
The EMS DRT27 LTE is a smart dendrometer for continuous monitoring of radial stem growth and the tree response to drought stress and freezing events. It combines the sensor, acquisition electronics and an LTE modem in one compact unit designed for long-term outdoor deployment.
The tape fixing method is non-invasive and does not affect natural growth. Because there is no upper stem diameter limit, the instrument can be installed on a wide range of trees. Thermal expansion of the construction closely matches wood behaviour, helping to maintain stable measurement under demanding field conditions.
The device sends data to EMScloud through a global SIM that automatically finds an available LTE network, so the unit is ready to transmit right after installation. Measured values can be viewed online, exported in several formats and further analysed in Mini32 for time-series work, automatic record alignment and growth parameter calculations.
It is an efficient tool for ecophysiology studies, drought monitoring, forestry campaigns, agricultural research and assessment of tree water status, especially when combined with soil water potential measurements.
- Online monitoring of trunk circumference increment.
- Integrated LTE modem with worldwide connectivity.
- Simple installation and low maintenance.
- Battery replacement possible without removing the sensor.
- Compatible with EMScloud and Mini32 software.
| Measuring interval | 30 min by default |
| Modem activity | 12 h by default |
| Battery life | Approx. 3 years with 30 min measurement interval and two transmissions per day |
| Circumference increment range | 71 mm |
| Resolution | Less than 1 µm |
| Internal temperature accuracy | ±0.3 °C |
| Protection rating | IP63 |
| Weight including battery | 540 g |
| Operating temperature | -40 to 60 °C |
| Operating humidity | 0 to 100% |
| Mounting | Non-invasive tape fixing with no effect on tree growth |
| Connectivity | LTE with global SIM and data delivery to EMScloud |
| Software | Web visualization on EMScloud and analysis in Mini32 |
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