# Rosemount 644HAI1Q4 Temperature Transmitter – HART, PT100

The **Rosemount 644HAI1Q4 Temperature Transmitter**, a product by Emerson Process Management, is designed for precise temperature monitoring in industrial environments. This transmitter, part of the HART series, excels in providing accurate temperature readings crucial for process control and automation. Its robust design and reliable performance make it a preferred choice for various industrial applications where accuracy and dependability are paramount.

This **temperature transmitter** features a PT100\_385 3-wire sensor, covering a temperature range from 0 to 100 degrees Celsius. Operating on a 12-42.4 VDC supply, it delivers a 4-20 mA output signal. Manufactured with precision engineering, the **Rosemount 644HAI1Q4** combines durability with advanced technology. This ensures consistent performance in demanding conditions. Perfect for applications requiring precise temperature control, the **644HAI1Q4** offers unparalleled reliability.

Key Features:

-   **Precision Temperature Measurement:** Accurate readings with the PT100 sensor for critical process control.
-   **Wide Temperature Range:** Operates effectively from 0 to 100 degrees Celsius.
-   **Robust Design:** Built for industrial environments, ensuring durability and reliability.
-   **HART Communication:** Enables advanced diagnostics and remote configuration.
-   **Efficient Output:** Provides a standard 4-20 mA output signal for seamless integration.

Specifications:

Supply Voltage: 12-42.4 VDC  
Output: 4-20 mA  
Sensor: PT100\_385 3-wire  
Temperature Range: 0 to 100 degrees Celsius

Choose the **Rosemount 644HAI1Q4 Temperature Transmitter** for dependable temperature sensing. Its robust design and high accuracy makes it ideal for a variety of industrial and automation systems. Contact us at [info@ramautomations.com](mailto:info@ramautomations.com) for more information.

## Details

- **Price:** 999.0 USD
- **Vendor:** Rosemount
- **Type:** Industrial Automation > Sensors > Temperature Transmitters
- **Tags:** 644HAI1Q4, HART transmitter, industrial automation, Rosemount, temperature monitoring, temperature transmitter

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| New | 999.00 USD | In stock |

## Images

- Rosemount 644HAI1Q4 Temperature Transmitter – HART, PT100-Ram Automations

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> Source: [Ram Automations](https://ramautomations.com/products/rosemount-644hai1q4-temperature-transmitter)
> Updated: 2026-09-18