A Simple Insulated Monopole Sensor Technique for Determination of Moisture Content in Hevea Rubber Latex

Ansarudin, Farizah; Abbas, Zulkifly; Hassan, Jumiah; Yahaya, Nor Zakiah; Ismail, M. A.

doi:10.2478/v10048-012-0034-5

Cited by 11 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…results obtained indirectly from the dielectric measurements with the actual m.c. found using the microwave oven method (Ansarudin et al 2012).…”

Section: Performance Analysismentioning

confidence: 99%

Microwave Technique for Moisture Content and pH Determination during Pre- Harvest of Mango cv. Chok Anan

Suhaime¹,

Sairi²,

Abbas³

et al. 2018

JSM

View full text Add to dashboard Cite

The maturity of mango is usually assessed by the determination of its moisture content (m.c.), soluble solid content (SSC) and pH. However, these techniques are either time consuming, tedious or destructive. In this research, we extend the application of the open-ended coaxial probe technique to determine m.c. and pH of Chok Anan mango from its dielectric properties from week 5 to week 17 after anthesis. The effects of frequency and m.c. on the values of the dielectric constant and loss factor were also investigated. The critical frequency separating the different polarizations was found to be inversely proportional to m.c. Also, in this research we proposed a new classification of fruit ripeness related to the number of weeks after anthesis. The actual dielectric properties, m.c., SSC and pH of Chok Anan mango were measured using standard methods. Relationships were established between the dielectric constant, loss factor, critical frequency, pH and m.c. The accuracy for the determination of m.c. and pH using the coaxial probe was within 1.7% and 3.0%, respectively.

show abstract

“…results obtained indirectly from the dielectric measurements with the actual m.c. found using the microwave oven method (Ansarudin et al 2012).…”

Section: Performance Analysismentioning

confidence: 99%

Microwave Technique for Moisture Content and pH Determination during Pre- Harvest of Mango cv. Chok Anan

Suhaime¹,

Sairi²,

Abbas³

et al. 2018

JSM

View full text Add to dashboard Cite

show abstract

“…With some materials, surface drying tends to form a "skin" that seals the moisture inside, but such effects have not been observed with natural rubber cup lump. In any case, this should not be relevant until relatively high dryness (Liang et al, 2003;Ansarudin et al, 2012). The increased surface area created by slicing the cup lump also reduces the barrier effects of such skin.…”

Section: Moisture Content (Mc) Measurementmentioning

confidence: 99%

Rapid moisture determination for cup lump natural rubber by near infrared spectroscopy

Suchat

Theanjumpol

Karrila

2015

Industrial Crops and Products

View full text Add to dashboard Cite

“…There are several applications reported that used the microwave technique to sense grain MC, such as a microwave microstrip ring resonator for single wheat grain (Abegaonkar et al, 1999) as well as a prototype moisture meter using a microwave transceiver (Kim et al, 2002), multi-layer microstrip moisture sensor (Jafari et al, 2010) and cylindrical slot antennas for rice grain quality . Besides, microwave technique was also applied in MC determination for oil palm fruit (You et al, 2010a), soybean (Shrestha et al, 2014), tuber (Zainuddin et al, 2013), clay granule (Mextorf et al, 2012), latex (Ansarudin et al, 2012;Mohammadi et al, 2012) and mortar (Jusoh et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Rice Grain Moisture Determination Using Microstrip Wide-Ring and Microstrip Coupled-Line Sensors

Mun¹,

You²,

Dimon³

2015

American Journal of Applied Sciences

View full text Add to dashboard Cite

Determining the Moisture Content (MC) inside rice grain is an important element for grain processesing such as harvesting, storage, quality control and transportation. A microstrip wide-ring sensor and a microstrip coupled-line sensor with low insertion loss were developed to operate at relatively low frequency to determine the MC and relative complex permittivity of rice grain. The complex permittivity for rice grain with various moisture levels was measured by the proposed sensors based on the resonance technique. Calibration equations for measurement of grain MC were obtained and validated with white rice for MC ranging from 10 to 28% wet basis. The coupled-line sensor showed better sensitivity to moisture measurement as compared to the wide-ring sensor. For a 1% change in MC, the changes of resonant frequency for the wide-ring and coupled-line sensors were 4.36 and 10.69 MHz respectively. Meanwhile, the wide-ring sensor had a higher accuracy in MC prediction than the coupled-line sensor. The average errors in moisture prediction for wide-ring and coupled-line sensors were 0.85 and 1.30% respectively.

show abstract

A Simple Insulated Monopole Sensor Technique for Determination of Moisture Content in Hevea Rubber Latex

Cited by 11 publications

References 9 publications

Microwave Technique for Moisture Content and pH Determination during Pre- Harvest of Mango cv. Chok Anan

Microwave Technique for Moisture Content and pH Determination during Pre- Harvest of Mango cv. Chok Anan

Rapid moisture determination for cup lump natural rubber by near infrared spectroscopy

Rice Grain Moisture Determination Using Microstrip Wide-Ring and Microstrip Coupled-Line Sensors

Contact Info

Product

Resources

About