Low-cost water-bath temperature controller

1992 ◽  
Vol 69 (7) ◽  
pp. 568 ◽  
Author(s):  
Gary D. Mercer
Keyword(s):  
Low Cost ◽  
Bath Temperature ◽  
Water Bath ◽  
Temperature Controller

Development of fuzzy logic water bath temperature controller using MATLAB

2012 ◽  
Author(s):  
Norhaslinda Hasim ◽  
Mohd Shahrieel Mohd Aras ◽  
Mohd Zamzuri Ab Rashid ◽  
Anuar Mohamed Kassim ◽  
Shahrum Shah Abdullah
Keyword(s):  
Fuzzy Logic ◽  
Bath Temperature ◽  
Water Bath ◽  
Temperature Controller

Water-bath temperature controller

1978 ◽  
Vol 16 (3) ◽  
pp. 334-336
Author(s):  
D. F. Noble ◽  
D. Pearce
Keyword(s):  
Bath Temperature ◽  
Water Bath ◽  
Temperature Controller

Low-cost programmed oven temperature controller

1982 ◽  
Vol 59 (4) ◽  
pp. 338 ◽  
Author(s):  
Gerald D. Clubine
Keyword(s):  
Low Cost ◽  
Temperature Controller

scholarly journals Design and development of polymerase chain reaction thermal cycler using proportional-integral temperature controller

2018 ◽  
Vol 14 (2) ◽  
pp. 213-218
Author(s):  
Chong Kim Soon ◽  
Nawoor Anusha Devi ◽  
Kok Beng Gan ◽  
Sue-Mian Then
Keyword(s):  
Polymerase Chain Reaction ◽  
Low Cost ◽  
Maximum Temperature ◽  
Gradient System ◽  
Chain Reaction ◽  
Temperature Controller ◽  
Proportional Integral ◽  
Integral Temperature ◽  
Polymerase Chain ◽  
Thermal Cycler

A thermal cycler is used to amplify segments of DNA using the polymerase chain reaction (PCR). It is an instrument that requires precise temperature control and rapid temperature changes for certain experimental protocols. However, the commercial thermal cyclers are still bulky, expensive and limited for laboratory use only.  As such it is difficult for on-site molecular screening and diagnostics. In this work, a portable and low cost thermal cycler was designed and developed. The thermal cycler block was designed to fit six microcentrifuge tubes. A Proportional-Integral temperature controller was used to control the thermal cycler block temperature. The results showed that the maximum temperature ramp rate of the developed thermal cycler was 5.5 °C/s. The proportional gain (Kp) and integral gain (Ki) of the PI controller were 15 A/V and 1.8 A/Vs respectively. Finally, the developed thermal cycler successfully amplified six DNA samples at the expected molecular weight of 150 base pair. It has been validated using the Eppendorf Mastercycler nexus gradient system and gel electrophoresis analysis

Research of Artificial Rumen Constant Temperature Water Bath Based on Fuzzy Logic Controller

2014 ◽  
Vol 602-605 ◽  
pp. 2487-2490
Author(s):  
Xi Wu Li ◽  
Bo Xu
Keyword(s):  
Fuzzy Control ◽  
Constant Temperature ◽  
Fuzzy Logic Controller ◽  
Control Unit ◽  
Bath Temperature ◽  
Water Bath ◽  
Dynamic Responses ◽  
Test Operation ◽  
Constant Temperature Water Bath ◽  
Temperature Water

In the artificial rumen device constant temperature water bath temperature control for model and parameter uncertainty is proposed that 89S51 microcontroller as the control core, using fuzzy control algorithm, realized thermostatically control of water bath temperature. This paper presents the overall system architecture and design philosophy of fuzzy control unit and associated circuits. Systematic simulation and test operation showed that: the good dynamic responses of the system, high precision control, strong robustness, achieve better control of the water bath temperature.

scholarly journals Preparation and Optimization of Waterborne Acrylic Core Microcapsules for Waterborne Wood Coatings and Comparison with Epoxy Resin Core

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2366 ◽  
Author(s):  
Xiaoxing Yan ◽  
Yu Tao ◽  
Xingyu Qian
Keyword(s):  
In Situ Polymerization ◽  
Urea Formaldehyde ◽  
Paint Film ◽  
Bath Temperature ◽  
Water Bath ◽  
Core Material ◽  
Wall Material ◽  
Formaldehyde Resin ◽  
The Core ◽  
Resin Core

Microcapsules were prepared by in situ polymerization with urea formaldehyde resin as the wall material and Dulux waterborne acrylic acid as the core material. The effects of the core–wall ratio, water bath temperature and depositing time on the morphology, particle size, yield and encapsulation ratio of microcapsules were investigated by orthogonal experiment of three factors and two levels. The results showed that the core–wall ratio had the greatest influence on the performance of microcapsules. When the core–wall ratio was 0.58:1, the water bath temperature was 70 °C, and the depositing time was 5 d, the microcapsule performance was the best. With the increase in depositing time, the yield of microcapsule particles increased gradually, and the microcapsules appeared to show an adhesive phenomenon. However, the long-term depositing time did not lead to complete deposition and agglomeration of microcapsules. When 10.0% concentration of the waterborne acrylic microcapsules with 0.58:1 of core–wall ratio was added to the coatings, the mechanical and optical properties of the coatings did not decrease significantly, but the elongation at break increased significantly. Therefore, this study offers a new prospect for using waterborne acrylic microcapsules to improve the toughness of waterborne paint film which can be cured at room temperature on a wood surface.

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