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The VTH533-B Air Duct Series Transmitter features a highly sensitive, waterproof, and fine dust-resistant probe, with a wide temperature range of –40°C to +80°C.

It supports standard industrial interfaces, including RS485 digital signal output (Modbus-RTU) and 4–20 mA analog output. With a built-in display, it can be connected to on-site digital display meters, PLCs, frequency converters, industrial control systems, and other equipment.

The air duct probe is designed to be waterproof, dustproof, heat-resistant, and corrosion-resistant, making it ideal for temperature and humidity monitoring in air duct applications such as rail transit systems, HVAC systems, central air conditioning, smoke exhaust pipes, and industrial waste gas ducts.

The probe length can be customized based on specific application needs and can be securely installed on the duct wall using hexagonal threads or mounting flanges.

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Key Features

• Integrated design: simple, compact, and easy to install

• Industrial-grade ESD protection and reverse polarity protection for power supply

• Equipped with waterproof, dustproof, and high-temperature-resistant probes

• High-sensitivity probe with excellent water resistance and fine dust protection

• Supports standard RS485 Modbus-RTU communication protocol

• High precision and stability, with IP66-rated waterproof and dustproof enclosure

• Available with multiple probe material options to suit various environments

• Digital signal output; default temperature unit is °C (°F available upon request)