Zedeyes 433 Round Glass Thermometer

The Zedeyes 433 is a classic, highly reliable round glass thermometer designed primarily for heating, ventilation, air conditioning (HVAC), and general industrial building services. Often referred to as an expansion or spirit-filled thermometer, it utilizes a colored organic liquid (alcohol fill) as its temperature-sensing medium, offering an eco-friendly, non-toxic, and highly legible alternative to mercury-filled instruments.

Enclosed in a durable protective brass housing and equipped with a matching brass thermowell, the Zedeyes 433 ensures long service life, fast thermal response, and continuous, power-free temperature indication across HVAC piping networks and climate control systems.

Key Features & Benefits

• Power-Free Temperature Monitoring: Operates purely on liquid thermal expansion, delivering continuous, reliable readings without requiring batteries or electrical wiring.

• Non-Toxic Organic Liquid Fill: Uses a brightly colored alcohol fluid column for high contrast, crystal-clear readability, and safe operational handling.

• Rugged Brass Housing & Thermowell: Features a heavy-duty protective brass casing and a threaded brass thermowell to safeguard the internal glass tube against mechanical impacts and line pressure.

• Fast Thermal Conductivity: Direct immersion via the brass thermowell allows rapid heat transfer for swift temperature tracking in fluid circuits.

• Versatile Range Options: Available in common HVAC temperature spans covering sub-zero cooling, ambient monitoring, and hot-water heating applications.

Primary Applications

• HVAC Systems: Chilled water lines, hot water heating circuits, and air handling equipment.

• Boilers & Heating Networks: Commercial building heating skids, boiler loops, and heat exchangers.

• Plumbing & Sanitary Systems: Domestic hot water lines and storage tank monitoring.

• General Industrial Utilities: Non-corrosive fluid temperature monitoring in OEM plant utilities.