Vertiv Liebert TW420 and THW420 Environmental Sensors

Vertiv Liebert TW420 and THW420 are environmental sensors designed to monitor the surrounding conditions of power and cooling equipment. These sensors help ensure optimal operation and prevent potential issues that could affect system performance.

Vertiv Liebert TW420 is a temperature sensor that provides accurate temperature readings of the environment around the equipment. It is essential for monitoring and maintaining the appropriate temperature levels to ensure the proper functioning of power and cooling systems.

Both sensors are designed to be integrated with Vertiv's management systems, enabling real-time monitoring and data collection. This integration helps in early detection of potential issues, allowing for timely intervention and maintenance to prevent system failures and downtime. By using Vertiv Liebert TW420 and THW420 environmental sensors, operators can achieve better control over their equipment's operating environment, leading to improved performance and longevity of the systems.

Technical Specifications



Supply Voltage

Tolerance of Resistance (Accuracy)

Response Time

Environmental Operating Range (Transmitter)

4 to 20 mA

Temperature - Band gap semiconductor - Humidity

24 VDC

+ 1.2° F (+0.6° C) + 2% RH (from 15 to 95% RH)

8 seconds for a 63% step

45° F to 96° F; 0 to 100% RH (7° C to 35° C); 0 to 100% RH

Key Features

High Efficiency

Achieves up to 96% efficiency in online mode, reducing energy consumption and operational costs.

Scalable and Design

 allowing for easy expansion and scalability to meet varying power needs.

Advanced Monitoring and Control

Offers comprehensive monitoring and control options, including network communication through SNMP, Modbus, and other protocols for real-time management.

Compact Design

Small footprint and compact size suitable for various installation environments, ensuring ease of installation and maintenance.

Wide Input Voltage Range

Capable of handling a wide range of input voltages with Automatic Voltage Regulation (AVR) to stabilize voltage fluctuations.

Battery Management

Features an intelligent battery management system to extend battery life, with hot-swappable battery design for easy replacement without downtime.

Advanced Protection

Protects against power disturbances such as surges, spikes, and outages, with high overload capability and fault tolerance.

Eco-friendly Design

Designed to minimize environmental impact, complying with global environmental standards.


Data Centers

Ensures continuous power supply and protection for critical IT equipment, suitable for small to medium-sized data centers.


Protects sensitive medical equipment from power disturbances, ensuring continuous operation of critical healthcare services.

Industrial Automation

Provides stable power for industrial control systems and machinery, minimizing downtime and production losses due to power interruptions.


Provides reliable power for telecom networks and equipment, ensuring uninterrupted communication services.

Commercial Buildings

Provides power protection for office buildings and commercial establishments, ensuring smooth business operations and protecting valuable equipment.