Insights into the Trends and Diversification in the HVAC Market

Innovative Sensor Technology IST AG is a pioneer in the HVAC industry, offering a wide range of products for the HVAC market. The company is more than just a standard component supplier providing technology and materials science resources to find best-in-class, customized sensors for various building automation applications.

Today, IST AG has become a one-stop destination for humidity, temperature, differential pressure and flow sensors. Therefore, it is the perfect partner to redefine an existing HVAC sensor portfolio or introduce new quality products.

Trends and Diversification in the HVAC Market from the View of a Component Manufacturer

There is a strong upward trend in the HVAC market today. Also, the industry has never witnessed such intense competition before. Novel features in Smart Thermostats are setting standards on a daily basis. However, there will always exist a strong need for stable and reliable sensing components, irrespective of how smart and efficient a system is, or no matter how much functionality and connectivity has been planned to be incorporated into the latest generation of HVAC products.

The mistake most companies in the HVAC market make is they focus their efforts only on the software communication of their systems and neglect to proof functionality and quality of the sensing component, which is their most important element. This makes all smart algorithms being as good as the data provided by the sensor component.

The strategy of Innovative Sensor IST AG is to supply well-engineered sensors which provide strong, dependable values through intelligent calibration and profound material science together with sophisticated manufacturing capabilities and quality equipment and machines required to carry out volume output with consistent quality.

IST AG’s customers trust the company’s brand name and appreciate the excellence in IST AG’s components and the resulting peace of mind, wherever HVAC instruments operate large investments under the control of the company’s products. The company’s portfolio for quality components is as follows:

P14 W

The standard P14-W humidity sensor capacitor is a passive humidity component, and is designed to resist dew formation. It provides excellent cross-contamination results when applied in various gases and also in several corrosive gases (users can request a test sample overview). The longevity of the P14 W is good when compared to other components in the market, especially in high humidity conditions and thus it is top choice for companies that intend to incorporate the P14 W humidity sensor into their own electronics and calibration capabilities. The P14 W provides excellent stability and long-lasting measurements due to its water-proof materials, such as the proprietary polymer design and the ceramic body. Some of the sensor’s applications are air ducts, thermostats, and RH+T transmitters.

P14 W

P14 W

HYT Calibrated Digital RH+T

The HYT sensors combine temperature and humidity digital modules. Stringent procedures are followed during calibration and qualification of the sensors. A nine-point calibration is performed to ensure that high accuracy is maintained over a wide temperature and humidity bandwidth, while the right materials assure longevity and satisfactory results beyond the data sheet. The HYT sensors are based on the IST AGs P14 flagship capacitor sensor. Both the sensor components and its surrounding materials are engineered to ensure almost zero moisture absorption, and to eliminate misreading as a result of false moisture/water sources. The technology used in HYTs has been provided in exposed sensor element versions and in two filter cap versions (mechanical protection) for simple integrations in compressed air transmitters, air duct¸ and wall mount thermostats.

HYT 271

HYT 271

HYT 221

HYT 221

HYT 939

HYT 939

FS7 Thermal Mass Flow Sensors

The FS7 is the latest development in mass flow sensor components on ceramic substrates at IST AG, and is equipped with a heating and sensing resistor. The sensor can be directly applied into the air flow and can measure typical HVAC air duct flow speeds ranging between 0 m/s and 25 m/s or more. The main advantage of the FS7 thermal mass flow sensor is its high sensitivity, particularly at lower flow rates 0 m/s to 1 m/s and up to 5 m/s, while operating within a wide dynamic range. The FS7 can read flow speeds between 0 and 100 m/s if applied in CTA (constant temperature anemometer) mode. The benefit of this design is a simple implementation for air duct flow transmitters. To control air-conditioning systems, hand-held devices use FS7 at the tip of a retractable monopod. Its low-cost implementation makes it suitable for filter monitoring, along with air purifiers. Compressed air mass flow metering and billing devices are high-performance applications.

PS7 thermal mass flow sensor

PS7 thermal mass flow sensor

MFS 05 Mass Flow Sensor

The MFS 05 is the latest generation of the MicroFlowSensor family of components. The design has a major improvement which anticipates more measurement symmetry if the flow direction changes. Compared to the FS7, the MFS 05 has been developed on a glass substrate (not ceramic). Four platinum resistors are the active components implemented within a thin membrane whose thickness is less than 10 microns. This enables performing measurements with ultra-low thermal mass, which results in an ultra-fast sensor with a response time of less than 10 ms. Additionally, the MFS 05 shows an ultra-sensitive measurement in differential pressure applications, which measures with a noise-free resolution of 5 mPa. The MFS 05 mass flow sensor is integrated in filter monitoring, positive ventilation systems (hospitals, clean rooms), micro-fluidic gas, and flow/glow box applications.

MFS 05 Microflowsens component

MFS 05 Microflowsens component

MID Packaged MFS 05 MicroflowSens Component

The MID-packaged MFS05 has been designed with IST AG’s MFS 05 MicroflowSens component with a proprietary thermal micro flow measurement method. The exceptional sensor-specific behaviour is shown on its low-temperature dependence, also under non-isothermal conditions (see raw data measurement plot at various temperatures in the diagram below). The build in the flow channel allows for simple system integration for ultra-low flow applications, ranging from 0 to 1 [sccm] and a wide dynamic range simultaneously up to 200 [sccm]. The sensor is available with 10 [ms] response time combined with detection of flow direction in one. Various MID packages are available with solderable contact pads, and all can be processed with automated pick and place procedures. The MID packaged MFS05 microflow component can be employed in a by-pass flow channel as a differential pressure and sensor, which will soon be available along with different USB plug-and-play evaluation boards.

MID with MFS 05 Microflowsens component

MID with MFS 05 Microflowsens component

Diagram showing intrinsic temperature compensation

Diagram showing intrinsic temperature compensation

This information has been sourced, reviewed and adapted from materials provided by Innovative Sensor Technology, USA Division.

For more information on this source, please visit Innovative Sensor Technology, USA Division.

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