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INSTRUMENTATION

Electronic Fibre Bundle Strength Tester


First Generation Type (using Microprocessor)
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A portable electronic fibre bundle strength tester have been developed which is basically a modification and upgradation of the manual type of instrument, developed by NIRJAFT in the early fifties.
It completely eliminates the human errors in operation.
The new instrument can measure Tenacity of the fibre bundle under test in gm/Tex, Breaking load in Kg, Elongation in % and Time of break in sec.  It also stores the results in the built in memory unit of the instrument.
The stored records can be downloaded to a PC, as and when required. It eliminates the manual error of operation completely and also eliminates the manual computations.   
It can run both in 230V, 50HZ ac supply and 12 V dc supply, thus is a completely portable instrument.

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Second Generation Type (using Microcontroller)
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An upgraded version of the previous Electronic Fibre Bundle Strength Tester has been developed by NIRJAFT which replaces the microprocessor based circuitry with the use of Microcontroller.
This new instrument has a very high response time and is more accurate and sensitive than the previous version.
Due to the application of modern microcontroller based elements, the price of this Electronic Fibre Bundle Strength Tester has been reduced to almost 50% than the previous version.
It can also run both in 230V, 50HZ ac supply and 12 V dc supply, thus is a completely portable instrument and also the stored records can be downloaded to a PC, as and when required.

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Digital Moisture Measurement Meter

First Generation (Laboratory Type)
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Initially a Laboratory type Digital Moisture Measurement meter  had  been developed by NIRJAFT to measure the moisture content of any jute product using any of the 3 types of probe using the principle of leakage current measurement technique and with the use of look up table method.    
In this instrument the facility of data storage and access facility was also present.  
The same instrument can also be used to measure moisture content of any textile and non textile test samples.
To measure the moisture content of any test sample, any one of the suitable probes, out of 3, is connected with the instrument and is placed over the test sample.
It can also store the test results using computer interface unit.

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Second Generation (Portable Type)
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A more handy digital moisture meter has been developed using Micro Controller for jute having the following advantages:
Response time is less than a second.
Using this single instrument Relative Humidity, Moisture content and Moisture Regain can be measured.
No sample preparation & expertise is required.
Long life rechargeable cells used.
Communication through USB port.
Economical.

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Online Moisture Measurement Unit
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This instrument is used for measuring the moisture content online from the fibre while it is under processing.
Here a semiconductor sensor has been used which senses the moisture vapor from the jute fibre and gives the Relative Humity, moisture content and regain value.
Due to the application of semiconductor type of moisture sensor, measurement and displaying of result occurs with a very short duration of time as required in on line system monitoring.  

Production quality will be improved and immediate attention to any variation of moisture can be identified and rectified easily using this system

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Electronic Fibre Fineness Meter
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The new Electronic Jute Fineness tester developed is an electronic version of the old mechanical type, developed by this institute earlier.
The fineness of the jute fibre in expressed directly in tex
This instrument eliminates various human and other source of error and also provides the correct result digitally within a very short span of time.

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Electronic Thermal Insulation Value Tester
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NIRJAFT has developed a unique Thermal Insulation Value Tester for a quick and reliable assessment of thermal insulation properties of both textile and non-textile materials.
It provides digital output, provides sound alarm when ready and data acquisition interface system, being implemented with personal computer.
Here the thermal resistance of the material is determined by using disc method, an application of Lee’s disc apparatus to textiles. Following internationally accepted standards guarded two plate method has been employed to develop the instrument.
The instrument can be used for the products having the thickness of wider range and under any atmospheric condition.
In this method, the material under test is held between two metal discs one of which has the known thermal resistance.
In steady state condition, the temperature drop values across the metal discs of known thermal resistance and across the material under test are measured and then used to obtain the thermal resistance of the specimen.
The TIV is calculated in Tog value and is displayed digitally.

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