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During our lab testing with pH and reference electrodes provided by Dr. Hintz, we found the reference electrode to be very sensitive to any movement around it even though the electrodes were enclosed inside a Faraday box . Thus, causing output signal to shift up/down. Per our group conversation with Mr. Marc Hebert at Microelectrodes, he recommended to […]
ASTEC AA16130 power supply provided by Dr. Hintz for our senior design project is being used to power up Dr. Hintz’s alkalinity measurement protoytpe and also our INA116 amplifier. During our lab testing we found out that the (-12 V) outputted by the power supply had a AC ripple as to clean DC signal. In […]
In this lab testing, we connected pH and reference electrodes provided by Dr. Hintz to INA116 amplifier. The amplifier was powered with 12 V DC batteries. During our testing we experienced more stability in the output using batteries as oppose to AC to DC power supply. The output of INA116 was connected to an oscilloscope […]
In this lab testing, we connected pH and reference electrodes provided by Dr. Hintz to INA116 amplifier. The amplifier was powered with AC to DC power supply provided by Dr. Hintz. The output of INA116 was connected to an oscilloscope. 1. pH 4 buffer fluid test 2. pH 7 buffer fluid test 3. pH 10 […]
The purpose of this project is to improve upon a device that automatically measures pH in order to calculate the alkalinity of seawater using the patented method of reverse gran titration by Dr. Kenneth Hintz and Dr. Christopher Hintz. The current device (Figure 1) which has been designed and implemented by Dr. K. Hintz, obtains […]
Erick Chacon was born and raised in Lima, Peru. His parents moved to the United States when he was 13 years old. As any other immigrant, the first big challenge in his life was to accommodate to a new language and culture. Once he defeated this obstacle, he began to seek what he wanted to […]
LMP91200 Configurable AFE for Low-Power Chemical Sensing Applications. LMP91200 is designed for 2-electrode sensors. Thanks to Texas Instruments for donating the boards for our senior design project.
Akash graduated from Falls Church High School on June 18th, 2010. He began his studies at George Mason University in the fall of 2010, starting as a computer engineering major. Akash later switched his major to electrical engineering in the fall of 2011. His particular interests in the field are control systems and electronics. He […]
I got my A.S. degree in Automotive Technology (T-TEN) in 2006. Worked at Toyota Dealership for 6 years as a Toyota Master Technician. Due to my interest in Hybrid Technology I decided to pursue B.S. degree in Electrical Engineering at George Mason University. As an Intern, I worked with construction company (General Contractor) as an […]
Kenneth J. Hintz received his B.S. degree in Electrical Engineering from Purdue University, West Lafayette, Indiana in 1967 and his M.S. and Ph.D. degrees in Electrical Engineering from the University of Virginia in 1979 and 1981 respectively. Since 1987 he has been an Associate Professor in the Department of Electrical and Computer Engineering at George […]
VIDEO 1: Introduction of INA116 Instrumental Amplifier VIDEO 2: INA116 Testing with Ph Probe VIDEO 3: INA116 pH Measurement with ADC
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