12V Dual Fan Speed Controller with Digital Temperature Display and Sensor, Waterproof NTC

12V Dual-Channel Temperature Controller and Fan Driver A compact, professional controller for 12V systems that automatically or manually controls two fans based on temperature, with clear indicators, adjustable temperature and speed settings, and protection against reverse polarity and abnormal supply voltage. Key benefits - Reliable temperature-based fan control for stable cooling and quieter operation by running fans only as needed. - Protects connected equipment by indicating low and high supply voltage and disabling output if input voltage is outside safe range. - Flexible operation modes: fully automatic temperature control, manual fan speed setting, or single-channel use when only one fan is required. - Small, easy-to-mount PCB that fits inside enclosures, racks, or vehicle dashboards. Main functions and advantages - Automatic and manual control: Display cycles between channel temperature and fan speed. Use the plus and minus buttons to switch displays quickly. Enter manual speed mode with the OK button to set fan output from 1 to 100 for precise tuning. - Temperature-based staging: Fans start at the minimum speed when channel temperature reaches the low threshold L. Fan speed increases as temperature rises. If temperature drops below the configured fan-off threshold F, the fan will stop when F is enabled. - Two-channel operation: Single-channel continuous output up to 1.2 A. When both channels are used, the combined current must not exceed 2.0 A. Avoid using fans with less than 0.15 A per channel unless appropriate for your setup. - Protection features: Reverse-polarity short-circuit protection with a sacrificial fuse on the input. Low-voltage and high-voltage indicators for the supply. If input voltage exceeds safe limits, the controller will disable output to prevent damage. - Clear alarms and limits: Stall alarm for each channel can be turned on or off. FAN on/off temperature, low and high temperature setpoints, and stall alarm settings are adjustable and saved after confirmation. Technical specifications - Supply voltage: DC 12 V. Operating range 11 to 14 V. - Output current: Single-channel maximum continuous output 1.2 A. Two-channel combined maximum 2.0 A. Recommended minimum fan current about 0.15 A. - Efficiency: Approximately 90 percent (measured at input 12 V, output dual 8 V at 0.8 A). - Reverse polarity protection: Short-circuit style protection with input fuse that