Wireless sensors – find manufacturers and suppliers

Wireless sensors are wireless technical components that record information such as temperature, humidity, pressure or other physical variables and transmit them to a receiving device (gateway, controller or data logger) using wireless technology.

They are ideal for hard-to-reach or remote locations where a cable connection is impractical.

Below you will find the functionality and areas of application of wireless sensors and their advantages and disadvantages as well as challenges that need to be considered:

How wireless sensors work:

Wireless sensors contain various sensor elements, depending on the variable to be measured (e.g. temperature sensors, humidity sensors, pressure sensors).

These sensors record the corresponding physical values continuously or at defined intervals.

The measured analog data is converted into digital signals in the sensor. This process takes place via an integrated microcontroller, which processes the data and prepares it for transmission.

The data is transmitted via wireless technologies such as Bluetooth, Zigbee, Wi-Fi, LoRa, NB-IoT or mobile radio (LTE, 5G). The choice of technology depends on the range, energy efficiency and the specific requirements of the application.
Bluetooth and Zigbee: Often used in short to medium range applications (up to 100 m).
LoRa and NB-IoT: Offer longer ranges of several kilometers with very low energy consumption, ideal for large-scale applications such as agriculture or smart cities.

Wireless sensors are often battery-powered, with battery life depending on the transmission frequency and power consumption of the wireless interface. Some modern wireless sensors use energy harvesting technologies, where they harvest energy from the environment (e.g. sunlight, vibrations) to extend battery life or run completely without batteries.

The transmitted sensor data is received by a gateway, data logger or central server. These devices then forward the data to a central database or cloud platform for further processing.

The received data can be visualized and analyzed in real time, often via a user interface (e.g. an app or web application).

Alarm functions can be set up to monitor critical thresholds.

Use of wireless sensors:

Wireless sensors are versatile and offer benefits in numerous industries. Here are some examples of their use:

1. Industrial automation:
Wireless sensors are used to monitor temperature, vibration or pressure in production machinery to detect faults or wear and tear at an early stage and minimize downtime.
By continuously monitoring machine parameters, maintenance intervals can be optimized and unplanned downtimes avoided.

2. Building technology (smart building):
Indoor climate monitoring: wireless sensors measure temperature, humidity and CO2 concentrations in buildings and enable efficient control of heating, ventilation and air conditioning systems.
Motion detection and security: Wireless sensors are used in security technology to detect movement or monitor windows and doors.

3. Agriculture (smart farming):
Wireless sensors monitor soil moisture, temperature and nutrient levels to optimize water and fertilizer use and increase crop yields.
Wireless sensors can be attached to animals to monitor their health and location in real time.

4. Logistics and transportation:
Cold chain monitoring: in food logistics, wireless sensors monitor the temperature of refrigerated containers to ensure that perishable goods such as food or medicines are transported in optimal conditions.
Wireless sensors enable the tracking of goods and vehicles to monitor supply chains in real time and identify bottlenecks or delays.

5. Environmental monitoring:
Wireless sensors measure pollutants in the air or water to detect pollution at an early stage and take measures to protect the environment.
Wireless sensors are used in weather stations to monitor precipitation, temperature and wind speed.

6. Medicine and healthcare:
In hospitals and care facilities, wireless sensors are used to continuously monitor vital parameters such as heart rate or blood oxygen.
Wireless sensors in wearable devices such as smartwatches monitor health data such as heart rate or step count and thus enable personal health monitoring.

Advantages of wireless sensors:

• No need for cables, making installation easier and more flexible.
• Data can be monitored in real time and from a great distance, often via cloud services
• Thanks to modern technologies such as LoRa or Bluetooth Low Energy, wireless sensors can achieve long battery life.
• Wireless sensor networks can be easily expanded to integrate additional sensors in different areas.

Disadvantages and challenges:

• Depending on the wireless technology, range can be limited, especially indoors or around obstacles such as walls.
• Battery-operated sensors require regular battery changes or recharging.
• Wireless sensors can be affected by electromagnetic interference or other wireless devices.

Wireless sensors offer flexible and efficient solutions for recording and transmitting sensor data in various areas. Their wireless nature allows them to be used in hard-to-reach or wide-area environments, while their increasing energy efficiency and range make them a valuable technology in industry, agriculture, healthcare and environmental protection.

Here are the key aspects to look out for when buying wireless sensors:

When purchasing wireless sensors, there are several important factors you should consider to ensure the sensors will meet the needs of your application.

• Select the wireless sensor according to the quantity to be measured (e.g. temperature, humidity, pressure, movement). Different applications require different sensor types.
• Pay attention to the accuracy and resolution of the measurements, especially in applications where precise data is required.
• Choose a wireless technology that matches the range of your application. Technologies such as Bluetooth or Zigbee are suitable for short to medium ranges, while LoRa or NB-IoT can cover long distances.
• Check whether the data transmission rate meets the requirements of your application. Higher rates are required if a lot of data needs to be transmitted in a short time.
• Make sure that the sensor operates in the correct frequency band (e.g. 2.4 GHz for Zigbee, sub-GHz for LoRa), depending on the country and application.
• Check how long the sensor can operate on one battery charge, especially if frequent replacement is difficult.
• Some wireless sensors use energy sources from the environment (sunlight, vibrations) to minimize battery consumption. This can be an interesting option for long-term applications.
• The sensor should be robust and weather resistant, especially for outdoor applications or harsh environments.
• Choose a device with a suitable protection class (e.g. IP65 for dust and waterproof applications) to protect it from environmental influences.
• Make sure that the wireless sensor is compatible with your existing systems. Look for supported protocols such as MQTT, CoAP or HTTP.
• Check whether the sensor can be easily integrated into your infrastructure, such as gateways or cloud platforms.
• In addition to the purchase price, also consider the long-term operating costs, such as battery replacement or maintenance.
• Choose a sensor that is easy to maintain and whose spare parts (such as batteries or sensor elements) are readily available.
• Make sure that wireless communication is secure, especially for sensitive data. Encryption standards such as AES are recommended.
• Check whether the manufacturer offers security certificates to ensure data protection.

By considering these factors, you can ensure that the wireless sensor meets the technical requirements, environmental conditions and operational requirements of your specific application.

Wireless sensors can be purchased from various suppliers. Comprehensive information about manufacturers and suppliers of Wireless sensors from all over the world can be found on Exportpages.