Universal Capillary Thermostat - 104mm Cooling Radiator Fan Control Switch (12V)

Radiator Fan Control Switch (12V) 1. Product Basic Information Product Type: Capillary thermostat for cooling radiator fan control (automatically triggers fan operation based on temperature) Voltage: 12V (compatible with most 12V after-market cooling fans, suitable for automotive, industrial, or equipment cooling systems) Material: Steel + Plastic (steel for durable temperature-sensing components, plastic for insulation and structural support; resistant to high temperatures and mechanical wear) Quantity: 1 piece (includes 1 capillary thermostat switch; cooling fan not included) 2. Core Technical Specifications Specification Item Details Temperature Control Range 0℃～120℃ (supports custom temperature setting within this range for fan activation) Temperature Accuracy 4±2℃ (ensures precise temperature detection, avoiding incorrect fan on/off triggers) Temperature Bar Length 104mm (long enough for stable installation in radiator hoses or cooling systems) Temperature Sensing Rod Diameter 5mm (slender design, easy to insert into hoses without blocking fluid flow) Capillary Length 1000mm (flexible and long enough for flexible routing during installation, adapting to different system layouts) 3. Key Features Custom Temperature Control: Allows users to set a specific temperature (within 0℃～120℃) for the cooling fan to activate; the fan automatically turns on when the system reaches the set temperature and shuts off when the temperature drops, maintaining optimal cooling efficiency. Universal Compatibility: Works with any 12V after-market cooling fan, no restriction to specific brands or models—suitable for automotive radiators, industrial equipment cooling, or DIY cooling projects. Easy Installation: Designed for hose-mounted use: Remove the top radiator hose. Fully insert the temperature probe into the hose. Reattach the hose and tighten (avoid damaging the internal probe). Use silicone sealant (optional) for enhanced sealing if needed. Simple Wiring: Clear terminal definitions for hassle-free setup: C Terminal: Connect to 12V power feed. No.2 Terminal: Connect to fan power input (switch grounds through the fan). No.1 Terminal: Leave blank (not required for standard use). Relay (optional): Can be wired in for higher-power fans, but not mandatory for basic operation. Reliable Temperature Sensing: Capillary design enables fast, accurate temperature detection; steel sensing components ensure stable performance even in high-temperature environments (up to 120℃). 4. Application Scenarios Automotive Use: Controls radiator fans for cars, trucks, or motorcycles (12V systems) to prevent engine overheating. Industrial/DIY Cooling: Regulates cooling fans for small industrial equipment, power supplies, or DIY electronic projects that require temperature-controlled cooling. Equipment Maintenance: Replaces faulty thermostat switches in existing 12V cooling systems, restoring automatic temperature control functionality. 5. Package Included 1 x 0～120℃ Capillary Thermostat Cooling Radiator Fan Control Switch (12V)