Filter Protects Small Digital Humidity Sensor

It takes a variety of components to make a sensor appropriate for targeted applications and environments. To protect Sensirion’sSHT2x humidity and temperature sensor from water, dust, dirt and various contaminants, the SF2 filter cap is such a component.  Made of PBT (Polybutylene Terephthalate) the filter cap has an integrated filter membrane. With a filtration efficiency of 99.99% of all particles >0.1μm, the filter cap is designed to keep response time low. The SF2 fits exactly to the external dimensions of the SHT21 and also serves as an adaptor for mounting the humidity sensor directly into the wall of housing.  The use of an o-ring seal results in a waterproof mounting solution that allows protection according to IP67 to be achieved.

For more information on Sensirion’s SF2 filter cap, click, here.

Endress+Hauser Introduces Four New Analytical Sensors

The  new IP68-rated Memosens analytical sensors are “plug and play” compatible with the company’s recently announced Liquiline M CM442 four-wire, two-parameter transmitter.

The Oxymax COS61D is an Optical Dissolved Oxygen sensor that uses the luminescence principle of fluorescence quenching. It has a measuring range of 0-20 mg/l (20 ppm).

The Indumax CLS50D is a non-contacting inductive conductivity sensor that uses the toroidal principle of electrodeless conductivity. It is capable of measuring from 2µS/cm to 2,000 mS/cm.

The Turbimax CUS51D uses three different techniques to measures turbidity/suspended solids sensor. It is capable of measuring 0-9,999 NTU/0-150 g/L.

The Viomax CAS51D photometric sensor uses UV absorption for concentration measurements. The CAS51D sensor is offered with measuring ranges of 0.1 to 50 mg/l, or 0.01 to 20 mg/l NO3-N.

For more information on Endress+Hauser IP68-rated Memosens analytical sensors, click here.

Four-wire, Two-parameter Transmitter Reduces Cost / Saves Space

Endress+Hauser’s Liquiline CM442 is a four-wire, two-parameter transmitter for analytical sensing applications. By accepting data from any two of the company’s Memosens sensors such as turbidity/suspended solids,  nitrate, SAC (UV254), ISE, dissolved oxygen, pH/ORP, chlorine, concentration and  conductivity, the transmitter avoids the cost of a second device and saves space with a simplified system.

Powered by 100-230Vac 50/60 Hz, 24Vac 50/60 Hz, or 24Vdc, the transmitters conform to Type 4X (IP66/IP67) and are NRTL certified for conformance to UL standard 61010-1 for installation in appropriate environments. The transmitters also have a single alarm output, two 4-20mA analog outputs and a backlit display.

For more information about Endress+Hauser’s Liquiline CM442 transmitter, click here.

Humidity and Temperature Sensor Qualified to Automotive AEC-Q100 Requirements

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.

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