Absolute Linear Dendrometer MIJ-02LM TypeII
Picture shows 2 sensors but selling sensor one by one
Feature
- Basically, target is the tree stem but by adjusting the securing bracket and spring rate will be able to measure thin branch, fruit, crops and etc.
- Possible to read daily expansion and contraction by equipping the non-backlash potentiometer.
- Reduced thermal characteristic to the limit by offsetting the linear thermal expansion coefficient of shaft and fixed nail.
- Avoid the thermal characteristic of potentiometer by using ratiometric output
- Minimum friction help to setting spring constant low
Introduction
Photosynthetic rate and water potential, these biological data are hard to gain by using automatic measurement. These difficulties can be solved by Dendrometer; MIJ-02 LM Type2 is the Dendorometer that will help measuring live tree’s sapwood displacement for long term and also high time resolution. MIJ-02 LM Type2 can measure with less than 0.1um resolution and also be able to analyze process of sapwood shrinks occur from sapflow and relation with sapwood pressure potential. As annual changes, individual carbon fixation and production from individual live tree will be the direct index which can lead estimation of whole canopy value.
Specification
| Product | MIJ-02LM Type2 (Sensor Only) Can purchase cable from 2m,5m or 10m choice The picture shows two sensors which does not mean selling as two sensor set |
| Measurement Range | 11000um |
| Resolution | 2.2um/mV (MIJ-01: 0.022um, MIJ-12: 2.2um) |
| Regression equation (Out put) |
dL=11000×Vout/Vpre (dL: displacement (um), Vout: voltage output, Vpre: preheat voltage） （MIJ-01: dL=11000*X001/5000input to PVS） |
| Preheat | 5VDC (Less than 1mA at 5VDC) |
| Withstand Voltage | >18VDC |
| pin assignment | Brown: preheat, Blue: Output voltage, Black: common (Preheat GND and output voltage GND are shared) |
| Sliding resistance | >0.3N (Not include spring） |
| Linearity | ±1％ |
| Thermal Characteristic | -0.126um/DEG |
| Waterproof | IP67 |
| Size |
Full Length:99.3mm(not include cable length) Diameter φ16mm (Include springφ20mm) |
| Weight |
30g (Not include cable weight） |
| Supplied |
Waterproof cable with connector |
Component List:(For first customer we suggest purchasing list 01〜05 )
| 1. | MIJ-02LM | With standard connecter cable 5m |
| 2. | MIJ-02LM Bracket | Dedicated Vice |
| 3. | Long Screw Bit L=65 | ＃3,L=65 |
| 4. | Long drill for pilot hole | φ2.5-L200mm,Griive Length:100mm |
| 5. | Fastening long Screw | Screw part L=50,φ5.9 Body L=85,φ4.2 length180mm |
| 6. | Drill for enhancing inner bark | φ4.5-L80mm, Groove Length:47mm |
| 7. | Thermocouple | 0.32TG,PVC |
| 8. | Standard connector cable 5m | For exchange |
| 9. | Connector cable 10m | Standard cable 10m version |
| 10. | Relay ended connector cable 5m | 5m cable for relay |
| 11. | Relay ended connector cable 10ｍ | 10m cable for relay |
New user need below parts
| MIJ-01 (1 or 2 sensor) |
 |
| MIJ-02 Bracket |  |
| Long screw Bit |  |
| Long Drill for Pilot hole |  |
| Fastening Long Screw |  |
| Cable |  |