Envco – Environmental Equipment

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Medium Fruit Growth Sensor

A series of absolute displacement sensors provides recording both size and growth rate of intact rounded fruits in three diameter ranges within 7 to 160 mm. Two phenomena affect fruit diameter. These are growth and internal water content. The growth component is usually dominant. At the same time, in some cases, the fruit may loose water that is manifested in deceleration of growth rate or even shrinkage of the fruit. It may be a result of water stress, lack of light, or another limiting factor. Thus, the FI-type sensor allows investigating effect of irrigation rate and other environmental factors on both water balance and growth of fruits. Another exiting application of the sensor is monitoring of harvested fruits during storage.
Fruit Growth Sensors for rounded and cylindrical fruits 7 to 45 mm
Fruit Growth Sensors for rounded and cylindrical fruits

The FI-type sensor consists of an LVDT transducer mounted in a special clip and a DC powered signal conditioner. Standard cable length between sensor and signal conditioner is 1 meter.

Original parallelogram design of moving arms provides firm and straight positioning of the sensor's flaps on a fruit under study.

FI-LM (large), FI-MM (medium) and FI-SM (small) models have different clips for providing three measurement ranges: 30 to 160, 15 to 90 and 7 to 45 mm, respectively.

FI-SM Specifications
Measurement range 7 to 45 mm
Resolution, mm 0.019
Sensitivity, mV/mm 52.6
Output
Standard 0 to 2 VDC, linear
Optional 4 to 20 or 0 to 20 mA
Supply voltage 10 to 30 VDC @ 1 W max
Noise < 1 mV w/filter, 1 kHz cutoff
Operating temperature 5 to 50 ℃
Temperature effect < 0.02% total stroke/℃
Excitation time 5 s

Ordering Information (Specify Output and Cable Length)
IS041011M FI-SM Fruit Growth (7 to 45 mm)
Other Ranges
IS042011M FI-MP Fruit Growth (15 to 90 mm)
IS043011M FI-LP Fruit Growth (30 to 160 mm)
IS044011M FI-XSP Fruit Growth (3 to 30 mm)

If you cannot find the part number in the documentation please provide detail. Specific to this item, it could include part number or application detail, (ex. 20 meters of cable, or 20 litres of volume)

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