Among the many ways to sense temperature, combinations of advanced optical principles used with optical fibers offer very different approaches, with application advantages and implementation limitations. The previous part of this article looked at two approaches to using optical fibers for temperature sensing based on the fiber Bragg grating (FBG) and the Mach-Zehnder interferometer (MZI). […]
Sensor Tips
Using optical fibers for temperature measurement, Part 2: Principles
Among the many ways to sense temperature, combinations of advanced optical principles used with optical fibers offer very different approaches, with application advantages but also implementation limitations. The first part of this article discussed general issues of sensing of physical parameters, especially temperature, and total internal reflection in optical fibers. This section will look at […]
Using optical fibers for temperature measurement, Part 1: Context
Among the many ways to sense temperature, combinations of advanced optical principles used with optical fibers offer very different approaches, with application advantages and implementation limitations. Temperature is the most widely sensed physical parameter; it’s that simple. What’s not simple is the many ways we have of measuring it through the use of sensors such […]
Differential pressure transmitter subsystems target HVAC, industrial air handling uses
Superior Sensor Technology announced the HS Series, an advanced family of differential pressure transmitter (DPT) subsystems that offer engineers a flexible, accurate, and easily configurable DPT design solution for HVAC and industrial air handling systems. The HS Series is a DPT subsystem that includes the already popular performance features of the HV Series with additional […]
How can CO2 sensing help overcome COVID-19?
One sensing tool that has played an important role since the beginning of COVID-19 is data loggers. Data loggers use a wide variety of sensors to measure everything from temperature to illuminance. One specific type of data logger equipped with a CO2 sensor has been used since the beginning of the pandemic to monitor and […]
Differential pressure transmitters are quickly configurable, require no calibration
Superior Sensor Technology today announced the HS Series, an advanced family of differential pressure transmitter (DPT) subsystems that offer engineers a flexible, accurate and easily configurable DPT design solution for HVAC and industrial air handling systems. The HS Series is a DPT subsystem which includes the already popular performance features of the HV Series with additional […]
What is the difference between a pressure sensor and a load cell?
A load cell is a type of force sensor and it has a direct relationship to pressure, since: pressure = force/area Eq. 1 The load cell’s electrical output is proportional to the mechanical force applied to it. The force can be hydraulic or pneumatic and the transducer is normally based on strain gauges. Other types […]
How have drone sensors advanced?
Large Predator B drones, built by General Atomics Aeronautical Systems and first flown in 2001, are used by the military to perform multi-mission Intelligence, Surveillance and Reconnaissance (ISR) missions over land or sea. Sensing payloads in the MQ-9A Predator B remotely piloted aircraft (RPA), include: Multi-Spectral Targeting System Model B (MTS-B) Electro-optical/Infrared (EO/IR), Lynx multi-mode […]
Analyzing different proximity sensor technologies
Utilized as a no-touch method to provide either precise distance measurement to an object or simple “there/not there” logic, proximity sensors span a wide range of technologies, each offering their own set of operating principles, advantages, and drawbacks. Some of the most commonly found technologies in portable or small embedded systems include ultrasonic, photoelectric, laser […]
MEMs device integrated with MCU-based measuring electronics in compact PCB assembly
Posifa Technologies introduced its new PVC4000 series MEMS Pirani vacuum transducer. Designed for cost-effective OEM integration, the device consists of a surface-mount MEMS Pirani sensor and microcontroller-based measuring electronics — all packaged in an ultra-compact PCB assembly featuring a connector-terminated wire harness. The PVC4000’s sensor element is based on Posifa’s second-generation MEMS thermal conduction chip, […]
