Sensors

This sensor is based on a unique capacitive cell, this affordable sensor is used in applications such as office automation, HVAC and home appliances and process control too.

HS1101LF Humidity Sensor – Measurement Specialties

This sensor sports a fast response time and very low temperature coefficient. It also has High reliability and long term stability of Parameters.

Humidity Measuring Range 1% – 99% RH. Nominal capacitance at 55% RH is 180 pF.

A Humidity to Frequency Convertor to make a Easy Digital Counter or Embedded Interface using the venerable 555 is shown below.

Correction – R4=49.9kΩ /  RV1=50 kΩ potentiometer.

“Measurement Specialties is a global designer and manufacturer of sensors and sensor-based systems which measure pressure/force, position, vibration, temperature, humidity, and fluid properties.”

Measurement Specialties
1000, Lucas Way Hampton, VA 23666 United States.

This water proof, chemical resistant, low drift Humidity and Temperature module from IST :provides a fully calibrated and compensated humidity and temperature digital signal output.

HYT 271 Humidity Temperature Module – IST AG

The Digital output is for a I2C interface in a 14 bit resolution. Accuracy at 23 °C is +/- 1.8 % RH  in the span of 0 % RH to 80 % RH. This reading comes with a Response time of less than 4 seconds.

They also have a LabKit with USB Interface to evaluate and implement in your system.

“The Labkit was developed as a Plug&Play tool for a  fast evaluation of the HYGROCHIP digital humidity  sensors. The ready-to-use system consists of a  PC-adapter with an USB connecting wire, a connection adapter with plugs for all product variants.”

Component level. manufacturer of thin-film RTD temperature sensors, capacitive humidity sensors, mass flow sensors and conductivity sensors.

Innovative Sensor Technology IST AG
Stegrütistrasse 14 9642 Ebnat-Kappel Switzerland

Versatile and Replaceable Digital humidity sensor, a cost-effective component. In the SHT family the capacitive humidity sensors are fully calibrated and provides a digital output ready for interface.

Digital Humidity and Temperature Sensor SHT71

Each SHT7x is individually calibrated in a precision humidity chamber. The calibration coefficients are programmed into an OTP memory on the chip. These coefficients are used to internally calibrate the signals from the sensors. The 2-wire serial interface and internal voltage regulation allows for easy and fast system integration.

The power consumption of around 80uW makes it ideal for battery operated devices. It measures the full span of  0-100% RH with a response time of 8 sec. The temperature range being -40 – +125°C.

SCK is used to synchronize the communication between microcontroller and SHT7x. The DATA tri-state pin is used to transfer data in and out of the sensor.

Sensirion is the leading manufacturer of high-quality sensors and sensor solutions for the measurement and control of humidity, and of gas and liquid flows.

Sensirion AG
Laubisruetistrasse 50, 8712 Staefa ZH, Switzerland.