Nexisense Temperature and Humidity Sensor Installation Issues and Complete Analysis

Definition of Temperature and Humidity Sensor

A temperature and humidity sensor is a commonly used environmental monitoring device in industrial and building environments, used to detect temperature and relative humidity in real time. Through high-precision sensing elements, the sensor converts physical environmental parameters into standard electrical signal outputs, enabling real-time monitoring and data management for offices, laboratories, buildings, ventilation ducts, and constant temperature and humidity environments.

According to installation methods and application scenarios, temperature and humidity sensors are mainly divided into two types:

• Wall-mounted temperature and humidity transmitters: suitable for offices, laboratories, and building automation environments

• Insertion-type temperature and humidity transmitters: suitable for ventilation ducts, HVAC systems, constant temperature and humidity chambers, and similar environments

Working Principle

The core working principles of Nexisense temperature and humidity sensors include:

Temperature Measurement
Semiconductor thermistors or diode P–N junction principles are commonly used. Temperature changes are converted into resistance or voltage variations, which are then processed by signal conditioning circuits to output standard signals.

Humidity Measurement
Based on polymer film or capacitive humidity sensing technology, changes in humidity cause variations in capacitance or resistance, which are internally processed and converted into standard output signals.

Signal Processing
The internal digital signal processing module converts the analog signals collected by the sensor into industrial standard outputs such as 4–20 mA, 0–10 VDC, or RS485 digital communication signals, enabling remote monitoring and data transmission.

Structural Analysis

Temperature and humidity sensors generally consist of the following components:

• Sensing element: high-precision temperature and humidity probe

• Signal processing circuit: amplification, filtering, and linearization

• Housing and mounting interface: protects the sensor from external environmental interference

• Display and output interface: optional LCD display or electrical signal output to host systems

Wall-mounted structures are lightweight and suitable for fixed wall installation; insertion-type structures are equipped with mounting flanges and can be directly inserted into ducts or constant temperature chambers to ensure representative measurement points.

Technical Advantages

High Accuracy and Stability

• Temperature accuracy up to ±0.2 °C

• Humidity accuracy up to ±1% RH

• Strong long-term stability, suitable for 24-hour continuous monitoring

Multi-Scenario Adaptability

• Wall-mounted types suitable for indoor environments

• Insertion-type suitable for ducts or constant temperature chambers

• Adaptable to light dust or high-humidity environments

Flexible Output and Communication

• 4–20 mA, 0–10 V, RS485 digital communication

• Compatible with PLC, DCS, building automation, or IoT platforms

Easy Installation and Maintenance

• Supplied with mounting flanges and screws for quick installation

• High protection rating, resistant to dust and minor impacts

Application Scenarios

• Offices and laboratories: temperature and humidity monitoring, environmental data recording, and experimental accuracy assurance

• Building automation systems: temperature and humidity feedback control for air conditioning and heating systems

• Ventilation ducts and constant temperature chambers: industrial and cold-chain temperature and humidity management

• Warehousing and logistics: environmental control for fresh food, pharmaceuticals, and vaccine storage

Measurement Methods

• Wall-mounted type: directly fixed to the wall, with the sensing element in direct contact with the environment

• Insertion-type: installed through a mounting flange into the interior of ducts or chambers, with the probe positioned within the measurement area to ensure representative data

• Signal output: supports analog outputs (4–20 mA or 0–10 V) or digital output (RS485), enabling linkage with control systems

Installation Precautions

Power-Off Installation
Ensure the device is not powered during installation to avoid circuit damage or electric shock hazards.

Installation Location
Wall-mounted type: select a stable environment, away from air-conditioning outlets and heaters.
Insertion-type: use the supplied flange and secure with screws before inserting into the measurement area.

Sensor Orientation
Insertion-type sensors should be installed vertically, with the probe facing downward to avoid measurement errors.

Avoid Heat Source Interference
Do not install near heat-conductive surfaces or locations with significant temperature differences from the measured environment.

Power Connection
Confirm correct power supply voltage and polarity. Avoid installing in locations prone to impact to prevent damage.

Maintenance and Care

• Regularly clean the sensor housing and filters

• Avoid contact with chemical reagents or highly corrosive media

• Avoid cold or heat shock and long-term condensation environments

• Inspect wiring and signal output status to ensure data stability

Technical Parameters

Frequently Asked Questions (FAQ)

Conclusion

Temperature and humidity sensors are essential foundational devices in modern environmental monitoring systems. Nexisense temperature and humidity sensors, with high-precision sensing elements, diversified structural designs, and standardized output interfaces, are widely applicable to offices, laboratories, building automation, ducts, and constant temperature and humidity environments. Proper installation, rational layout, and regular maintenance ensure long-term stable operation, providing accurate and traceable environmental data to safeguard production, experimentation, and storage environments in compliance with safety and regulatory requirements.