Description
Product Overview
The Honeywell Q340A1090 thermocouple block is engineered for demanding industrial applications where accuracy, durability, and ease of installation are paramount. Crafted from high‑grade stainless steel, this block resists corrosion, oxidation, and mechanical wear, ensuring a long service life even in the most aggressive environments. With an upper temperature rating of 2300°F, it comfortably handles the extreme heat generated by gas furnaces, water heaters, and other high‑temperature equipment. The embedded mounting style allows the block to be securely installed within a conduit or panel, providing a clean, space‑saving solution. Its digital output delivers precise temperature data directly to control systems, eliminating the need for additional signal conditioning and reducing overall system complexity.
![[Product front view showing all components]](https://www.ilvix.store/wp-content/uploads/2026/07/176f3e1bcf474d278d85be8963c34d7c.jpg)
Usage
Designed for gas furnace and water heater installations, the Q340A1090 excels in both new builds and retrofit projects. It is ideal for commercial heating plants, residential boiler rooms, and industrial process lines where reliable temperature monitoring is critical for safety and efficiency. The block can be integrated into existing control panels, PLCs, or dedicated temperature monitoring units. Its compact dimensions (1.5 x 2.5 x 3.5 inches) make it suitable for tight spaces, while the low supply voltage requirement (0.07 V) ensures minimal power consumption. Whether you are monitoring combustion chamber temperatures, boiler water levels, or exhaust gas conditions, this thermocouple block provides consistent, repeatable readings that help maintain optimal operating parameters.
Why Choose Us
Honeywell is a globally recognized leader in sensor technology, and the Q340A1090 reflects the company’s commitment to quality and innovation. Each block undergoes rigorous testing to meet or exceed industry standards, guaranteeing accuracy and reliability. The stainless‑steel construction not only protects against corrosion but also offers superior mechanical strength, reducing the risk of damage during installation or maintenance. Our dedicated technical support team is available to assist with integration, troubleshooting, and calibration, ensuring that you get the most out of your investment. Additionally, the product is backed by a comprehensive warranty, giving you confidence in its long‑term performance.
Key Features
- Stainless‑steel body provides exceptional corrosion resistance for extended service life.
- 2300°F upper temperature rating handles the most demanding heating applications.
- Embedded mounting design saves space and simplifies panel integration.
- Digital output delivers accurate temperature data with minimal wiring.
- Honeywell technical support and warranty ensure reliable after‑sales service.
FAQ
What type of temperature sensor is used in the Q340A1090?
The block incorporates a high‑precision thermocouple element that converts temperature variations into a digital signal, providing fast and accurate readings.
Can this thermocouple block be used with existing control systems?
Yes. The digital output is compatible with most PLCs, DCS, and dedicated temperature controllers, allowing seamless integration without additional signal conversion hardware.
Is the block suitable for outdoor installations?
While the stainless‑steel housing offers excellent protection against moisture and corrosion, it is recommended to install the block within a protected enclosure for optimal longevity in harsh outdoor environments.
What is the recommended wiring configuration?
Connect the block’s supply leads to a low‑voltage source (0.07 V) and route the digital output to the input channel of your control system. Follow the wiring diagram provided in the product manual for best results.
How do I calibrate the thermocouple block?
Calibration can be performed using a reference temperature source and the Honeywell calibration software. Detailed procedures are included in the user guide, and our support team can assist if needed.




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