In Part 2 of this two-part article we apply our method to a real-world application and show how, by combining estimation methods with thermistor characterization data, we can achieve high accuracy measurements over a wide temperature range using the simple voltage divider circuit we described in...More>>

This two-part article describes how to use a simple voltage divider circuit with a thermistor to achieve high-accuracy temperature readings over broad measurement ranges. Part one discusses the circuit and various temperature estimation methods.More>>

This article describes a technique for correcting signal-path errors for sensor analog front ends to reduce offset and gain errors and to achieve high accuracy and linearity.More>>

The city of Santander in Spain is the site of a large-scale Smart City test bed. As part of this project, Libelium's wireless sensor networks are used to collect data on a range of parameters important for the health of the city and its inhabitants. More>>

A new sensor enables in situ measurement of key chemicals in fermentations, enabling closer control and optimization of the fermentation process.More>>

Humidity measurement is increasingly important in an expanding number of industries. In this article we discuss a single-chip relative humidity (RH) sensor that offers robust performance, a small size, and low power consumption and can enable accurate humidity sensing in a wide variety of...More>>

By combining best practices with sophisticated software development tools and debuggers, engineering teams can produce compact, low-power sensor products.More>>

VDC has partnered with <i>Sensors</i> magazine to assemble comprehensive demand-side and supply-side studies on the market for data acquisition (DA) systems, examining the respective markets for external chassis and module products, plug-in analog I/O board bus architectures/form factors, and...More>>

Isolating power sources and sensor signals is the most effective method for eliminating undesirable ground loop currents and induced electrical noise when collecting data using PC-based DA equipment. This article provides an understanding of how measurement inputs become corrupted and why it is...More>>

A 25-year service life is becoming an international standard for long-term battery performance in wireless sensor applications. However, achieving this milestone is often difficult to prove, because primary (non-rechargeable) lithium batteries cannot be easily tested in conditions that accurately...More>>