Product Overview

(Integrated Alarm Light: Green – Normal / Red – Warning)

Monitoring temperature and humidity is critical in many industrial and storage environments. To ensure optimal conditions, reliable and continuous measurement is essential. The AT-THMT-L Industrial Temperature and Humidity Sensor is a professional solution designed to provide real-time, easy-to-read environmental data indoors, while featuring an integrated two-color Alarm Light (Green/Red) for instant visual alerts.

This device is ideal for applications such as warehouses, factories, cold storage, offices, and any indoor space that requires constant monitoring of temperature and humidity.

What Is the AT-THMT-L Industrial Temperature and Humidity Sensor?

The AT-THMT-L model is an LED temperature and humidity display unit manufactured by ATPro. It is designed to visually show current temperature and humidity using LED indicators, helping operators quickly assess environmental conditions without manual checks.

Unlike basic handheld thermometers or hygrometers, the AT-THMT-L provides continuous digital readings, combined with a two-color Alarm Light (Green/Red), making it highly practical for industrial supervision and facility management.

Key Features of AT-THMT-L (With Green/Red Alarm Light)

The AT-THMT-L is designed to provide stable and accurate temperature and humidity monitoring in indoor industrial environments. With a clear LED display, wide measuring range, optional Modbus communication, and especially an intelligent two-color Alarm Light, this device supports proactive supervision and instant alerting when parameters exceed allowable thresholds.

LED Display with Multiple Visibility Options

The AT-THMT-L displays temperature and humidity values on a red LED display. Other LED color options (amber, blue, green) may be available as default variants.

Large Format for Indoor Monitoring

With a screen size of 350mm × 600mm × 50mm, this display is suitable for indoor industrial environments where visibility is important.

Wide Measurement Range

The unit supports a broad measuring range for different environmental setups:

• Temperature: -40°C to +125°C
• Humidity: 0% to 100% RH
  Combined with a working environment range of -20°C to 60°C and 0–95% RH, the device adapts to most indoor industrial conditions.

Accurate and Clear Readings

The instrument provides:

• Resolution: 0.1°C, 0.1% RH
• Accuracy: ±1°C, ±5% RH
  Reliable readings help reduce the risk of environmental issues that might affect product quality or processes.

INTEGRATED ALARM LIGHT – GREEN / RED (Key New Feature)

To enhance proactive monitoring, the AT-THMT-L is equipped with a high-intensity two-color Alarm Light on the front panel:

• Operating mechanism: Users can set minimum/maximum thresholds for temperature and humidity via push buttons or software or industrial keypads. When measured values are within range → Green light. When either parameter exceeds the threshold → immediately switches to Red light.
• Benefit: Operators can visually monitor from a distance just by looking at the light color, without needing to read the exact numbers. Response time is reduced to just seconds.
• Real-world applications: Extremely useful in cold storage, server rooms, pharmaceutical factories, food warehouses, chemical storage – where any delay in detecting anomalies can cause significant losses.

Modbus RTU RS485 Communication (Optional)

This display can be integrated with automation systems such as PLC or SCADA via Modbus RTU RS485, allowing centralized monitoring and data collection. The alarm light status (Green/Red) can also be transmitted to the control center.

Indoor Use and Protection Rating

Designed for indoor environments (e.g., warehouses, factories, offices), the AT-THMT-L supports a protection rating of IP50 to resist dust and ensure durability in industrial settings.

Technical Specifications

Technical & Environmental Specifications

Typical Industrial Applications

The AT-THMT-L is suitable for environments that require clear and continuous monitoring of temperature and humidity:

• Factories and production facilities
• Warehouses and storage areas
• Cold storage rooms
• Offices and administrative buildings
• Server rooms, data centers, and synchronized visualization systems using LED matrix clocks
• Industrial indoor spaces requiring real-time environmental feedback

Thanks to the Green/Red Alarm Light, staff can detect anomalies even from a distance or at an angle: Green = safe; Red = problem – immediate inspection required.

Why Temperature and Humidity Monitoring Matters

Controlling temperature and humidity is crucial for industrial operations. Improper conditions can lead to:

• Product spoilage or degradation
• Equipment malfunction
• Increased maintenance costs
• Unstable production quality

Using a reliable display like the AT-THMT-L with color-coded alarm light (Green/Red) helps businesses maintain optimal environmental conditions and proactively reduce risks in an instant.

"For more details about the AT-THMT series, please visit the official product page."

Conclusion

The AT-THMT-L Industrial Temperature and Humidity Sensor offers a dependable solution for measuring and monitoring environmental conditions inside industrial facilities. With its robust LED display, wide measurement range, optional communication features, high accuracy, and especially the intelligent two-color Alarm Light (Green = normal, Red = abnormal), this device supports businesses in maintaining stable, safe environments and responding instantly to any deviation.

If you need a professional, continuous, and visually intuitive temperature and humidity monitoring system – where you can tell the status at a glance just by looking at the light color – the AT-THMT-L is the most effective choice.

👉 Learn More about Industrial Equipments