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Non-destructive dendrometer MIJ-02LMS-MIJ-02LMS
Non-destructive dendrometer MIJ-02LMS-Japan Environmental Measurement Co., Ltd.

Non-destructive dendrometer MIJ-02LMS
Japan Environmental Measurement Co., Ltd.


About This Product

■Summary

MIJ-02LMS Type II is a high-resolution dendrometer that can be installed and operated non-destructively, targeting thin branches and stems with a diameter of 23 mm or less. The structure is based on the MIJ-02LM type 2, which has been verified for long-term stable operation outdoors, and is equipped with a hammer head that can handle thin samples. The thinner the plant, the less destructive it is, so LMS was developed with the condition of being "non-destructive." The sample cross section is divided into 120° sections from three directions to improve holding performance. In addition, the unique shape of the fastening part in which the fastening part to the sample is separated from the side cross section and extends in the direction of the stem (trunk) makes it possible to disperse and minimize stress caused by attachment of foreign objects from the plant's perspective. This stress-free structure also has other benefits, as it eliminates almost all the time it takes for the sensor to adjust to the sample, allowing it to output measurement data that is useful for analysis immediately after installation. Another advantage of the hammerhead is its ability to geometrically amplify resolution. Thin trunks and stems generally have a radius displacement in the range of ± several tens of um/day. It can be determined that the measurement resolution required to confirm the change is 1/100 of that, 0.1 um. Depending on the resolution of the data logger to which the LMS is connected, a resolution of 0.00911um/0.01mV can be obtained. This resolution exceeds that of the LM type. The basis for this is Hammerhead. This stay has the effect of increasing the resolution geometrically, and the resolution becomes 1/ (1+SQR2) with the LM ratio of the direct drive type. The annual change in diameter is typically 10 mm/year in particularly fast-growing tropical rainforests, and several mm/year in temperate Japan. LMS has a measurement range of φ1.5 to 23mm, so that range is sufficient. Direct indicators of individual carbon fixation and production can be obtained, and values ​​for entire forests and fields can be estimated by scaling.

■Features

・Dendrometer: non-destructive type ・Measurement with high time resolution, unattended, and high resolution ・Measurement range from φ1.5 to 23mm ・Output is ratiometric. Avoid temperature characteristics of internal potentiometer ・Spring constant can be set low because friction is minimal

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    Non-destructive dendrometer MIJ-02LMS

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1 Models of Non-destructive dendrometer MIJ-02LMS

Image Part Number Price (excluding tax) Cable Size Spring constant Pin assignment Preheat Output Output regression equation Resolution Sliding resistance Standard accessories Standard product model Temperature characteristics Measuring range Linearity Withstand voltage Weight Waterproof ability
Non-destructive dendrometer MIJ-02LMS-Part Number-MIJ-02LMS

MIJ-02LMS

Available upon quote

Sold separately (select from 2m, 5m, 10m)

Total length: 133mm (when measuring the maximum target diameter of 23mm)

Standard 0.3N/mm

Brown: Preheat Blue: Voltage output Black: Common (Preheat GND and voltage output GND are shared)

5VDC (<1mA at 5VDC), 0.1 seconds (<1 second depending on the logger's start-up performance)

Ratiometric (e.g., output full scale is 5V when preheating is 5V)

Dr=11,000* (Vout/ Vpre) / (1+SQR2 )
dr: Radial displacement, Vout: Output mV, Vpre: Preheat voltage mV, SQR: Square root

0.911um/mV

0.3N or less (not including spring)

MIJ-02LMS body, Ept Sealer 1m, Insulok

MIJ-02LMS TypeII (sensor only)

<-0.126um/DEG

Φ1.5mm~23mm

±1%

18VDC or less

42g (including U-shaped stay, not including attached cable)

IP67

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