Measure Relative Humidity and Temperature Without Wires
May 31, 2011 by Randy Frank
Filed under Chemical Sensor, Featured, Temperature
Wireless is the must-have attribute for many of today’s consumer and industrial products. When you get two for one, so much the better. With Omega’s UWRH-2 wireless relative humidity transmitter users get both relative humidity and temperature measurements. The battery-powered unit transmits these readings as well as signal strength and battery status back to a host receiver up to 120 m (400’) away.
The unit’s temperature range is -17 to 49°C (2 to 120°F) with an accuracy of ±1°C (±1.8°F). The relative humidity range is 2 to 98% RH with accuracy from ±2.5 to ±3.5 % max depending on the temperature range
For more information about Omega’s UWRH-2 wireless relative humidity transmitter, click here.
Humidity and Temperature Sensor Qualified to Automotive AEC-Q100 Requirements
July 19, 2010 by Randy Frank
Filed under Chemical Sensor, Featured
Many environments require special qualification testing to prove that the product can withstand more than usual application requirements. This can include Underwriters Laboratories (UL), International Electrotechnical Commission (IEC) or in the case of automotive, the Automotive Electronics Council (AEC).
Sensirion’s SHT21 humidity and temperature sensor has passed rigorous AEC Q100 qualification testing. The capacitive type humidity sensor and an improved band gap temperature sensor are Implemented in a standard semiconductor fabrication process. Sensirion’s CMOSens technology enables the sensor component to be combined with the analog and digital signal processing circuitry. As a result, the output of the SHT21 can be either digital I2C, analog pulse width modulated (PWM) or analog Sigma Delta Modulated (SDM) format.
An evaluation Kit EK-H4 is available for the SHT21.
For more information on Sensirion’s SHT21 humidity and temperature sensor, click here.
Setra Systems’ Model SRH Humidity Sensors
February 17, 2009 by R. Nelson Parrish
Filed under Temperature
Boxborough, Mass.– Setra Systems introduces its new Model SRH Humidity Series product line. The product line is designed to measure relative humidity in a room, duct or outside and is available in accuracies of ±2%, ±3%, and ±5%. The SRH Series features a replaceable sensor tip that ensures an accurate, calibrated, and cost effective humidity control system.
Setra’s humidity sensor family consists of a wall display, duct mount, and outside air unit. This product line is designed to complement Setra’s pressure transducers and current switches while expanding the solution opportunities for the HVAC/building automation market and other relative humidity monitoring applications. All models provide excellent reliability via a unique and established ASIC that is also used in Setra pressure transducers. Also, Setra’s robust, proven capacitive sensor technology is capable of full-scale 0 to 100% RH measurement.
The field-replaceable sensor tips are easily removed in all three models, allowing the end user to replace the sensors on-site. This essentially eliminates time consuming and costly factory calibration, while reducing downtime during service intervals. Additionally, the duct mount probe is easily accessed by removing the front cover, pulling out the sensor board assembly, and replacing the sensor tip. This further contributes to a more user-friendly, lower cost product line that is focused on customer needs and ease of use.
Setra’s humidity sensors are designed to complement its pressure and current products, thereby, providing customers with a complete line of sensors for all of their HVAC needs. Setra’s humidity offering will meet the quality, delivery, and cost needs of its customers while providing the best solution for all of their sensor requirements.
