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Low cost telemetry with PC sound card for chemical analysis applications
D Nacapricha1, N Amornthammarong, K Sereenonchai
1Flow Innovation-Research for Science and Technology Laboratory (FIRST Laboratory), Department of Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand.
Abstract:
This work describes the development of a telemetric system in conjunction with a computer sound card for recording of signals. For signal transmission, a transmission wireless microphone was utilized, making the telemeter compatible with the sound card normally equipped inside a personal computer. The developed telemeter is a low-cost apparatus capable of remote monitoring. With the sampling rate of 10Hz, 100% accuracy was obtained up to a distance of 30m. The precision was good (%RSD=0.03-0.09), with relatively low noise. The effective signal range was from 0 to 2V, with approximately 1100 working steps (greater than 10bit A/D). The telemetric system was shown to be suitable for wireless recording of outputs from spectrophotometer and pH meter. Potential applications in chemical analysis were demonstrated.
