ACA-Derm Moisture Meter

Author(s):  
Donald R. Wilson
Keyword(s):  
2005 ◽  
Vol 1 (1) ◽  
pp. 77-93
Author(s):  
Bíborka Gillay ◽  
David B. Funk

The price paid for corn is usually based on 15.0 or 15.5 percent moisture content. However, corn must be dried below 13 percent moisture to ensure safe storage for a year or more. In the U.S., such stored corn cannot be directly remoistened before selling it, but it can be mixed with moist new-crop corn. Accurate moisture measurement of mixtures of dry and moist corn is important to permit adjustment of blending ratios to maximize profitability, but grain moisture meters are less accurate for mixtures of wet and dry grain. This research evaluated the differences between dielectric-type moisture meter results for mixed and equilibrated corn samples at different moisture levels and different measurement frequencies. Equilibrated grain samples tended to give lower moisture results than recently mixed grain samples - especially in the 1 to 10 MHz region. These differences permitted detection of mixtures by using moisture measurements at two frequencies.


1945 ◽  
Vol 22 (12) ◽  
pp. 243-244 ◽  
Author(s):  
C F Brockelsby
Keyword(s):  

1935 ◽  
Vol 25 (3) ◽  
pp. 326-343 ◽  
Author(s):  
W. S. Rogers

1. A soil moisture meter which gives direct and continuous measurement of the soil moisture content is described. The instrument consists of a special porous pot filled with water, connected by a tube to a mercury manometer. The pot is buried in the soil, whose capillary pull causes the mercury to rise. The height to which the mercury rises depends on the amount of moisture in the soil, and also on the size of soil particles and the degree of compactness of the soil. (The last two factors remain constant for an instrument in one position.)2. To read actual moisture percentage each instrument has to be calibrated for the soil in which it is placed. Once this is done, all sampling and weighing is eliminated.


1987 ◽  
Vol 30 (3) ◽  
pp. 0853-0857 ◽  
Author(s):  
Spires Mexas ◽  
G. H. Brusewitz

2016 ◽  
Vol 5 (4) ◽  
pp. 327-333 ◽  
Author(s):  
Putri Asriya ◽  
Meqorry Yusfi

Telah dilakukan rancang bangun sistem monitoring kelembaban tanah menggunakan wireless sensor berbasis Arduino Uno. Rancangan perangkat keras sistem ini terdiri dari satu unit transmitter yang dilengkapi oleh sensor soil moisture SEN0114 V2 dan satu unit receiver. Semua unit dikendalikan dengan menggunakan Arduino Uno. Data kelembaban tanah dikirim oleh unit transmitter  ke unit receiver menggunakan transceiver nRF24L01+ yang memanfaatkan gelombang radio sebagai media pengiriman. Hasil deteksi nilai kelembaban tanah pada sensor ditampilkan oleh LCD 2x16 karakter. Hasil pengujian sensor kelembaban tanah meperlihatkan bahwa hubungan antara tegangan keluaran sensor dengan kelembaban tanah pada moisture meter adalah linear dengan nilai regresi sebesar 0,9758. Berdasarkan pengujian transceiver, jarak terjauh pengiriman data yang dapat diterima oleh receiver di luar ruangan tanpa ada penghalang adalah 200,1 m. Pada pengujian variasi sudut pengiriman, data dapat diterima oleh unit receiver pada sudut ³ 26,56⁰. Apabila sudut lebih kecil dari 26,56⁰ data masih dapat diterima dengan adanya delay hingga sudut 11,31⁰.Kata kunci: sensor soil moisture, kelembaban tanah, wireless, gelombang radio, nRF24L01+ 


1993 ◽  
Author(s):  
D.C. Agouridis ◽  
T.M. Gayle ◽  
W.H. Griest
Keyword(s):  

1975 ◽  
Vol 27 (3-4) ◽  
pp. 331-337
Author(s):  
M. Visvalingam

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