SF-101S Digital Temperature Controller, LED Thermostat with NTC Sensor, 12VAC Power, Automatic Defrost, High Accuracy Cooling Control, 30A Relay

The SF-101S Digital Temperature Controller is a compact and reliable thermostat designed for refrigeration systems, cold rooms, freezers, and HVAC applications. It provides precise temperature monitoring and control with a range of -45°C to +99°C (-49°F to +210°F). Equipped with a 2m NTC sensor probe (extendable up to 100m), the SF-101S ensures accurate measurement and stable operation. The built-in 30A relay supports direct compressor control, while the automatic defrost function allows interval-based defrosting with adjustable duration. Additional safety features include compressor start delay, parameter locking, high/low temperature alarms (HH/LL), and self-testing. Its mini-sized panel design makes it easy to install in tight spaces. Perfect for refrigeration units, cold storage facilities, HVAC systems, and temperature-sensitive projects, the SF-101S is a durable and versatile solution for professional cooling control.Technical Specifications: - Model: SF-101S Digital Temperature Controller - Power Supply: 12VAC (requires external transformer) - Temperature Sensor: NTC, 1 probe, 2m length (extendable up to 100m) - Display Range: -45°C ~ +99°C (-49°F ~ +210°F) - Accuracy: ±1°C (±2°F) - Set Temperature Range: -45°C ~ +99°C (-49°F ~ +210°F) - Relay Output Capacity: Compressor relay, 30A / 250VAC - Defrost Function: Automatic, interval & duration adjustable - Alarm Function: Displays “HH” when sensor > +99°C or short-circuited; “LL” when sensor <-45°C or open-circuited - Protection Features: Compressor start delay, parameter locking, self-testing - Dimensions (L×W×D): 77 × 35 × 30 mm (3.03 × 1.38 × 1.18 in) - Mounting Hole: 71 × 29 mm (2.80 × 1.14 in) - Operating Environment: -10°C ~ +60°C (14°F ~ 140°F), 20% ~ 90% RH (non-condensing) - Accessories: 1 × NTC temperature sensor, 1 × installation stand, 1 × external relay, 1 × external transformer

• Accurate Temperature Display & Control – Wide measurement range of -45°C to +99°C (-49°F to +210°F) with ±1°C accuracy.
• NTC Sensor Included – Comes with a 2m NTC probe, extendable up to 100m without recalibration.
• High Capacity Relay – Built-in 30A/250VAC compressor relay, ensuring powerful and reliable performance.
• Automatic Defrost Function – Interval-based defrost control with optional locked display during defrost cycles.
• Compact & Easy Installation – Mini panel size 77×35×30mm with 71×29mm mounting hole, ideal for refrigeration, HVAC, cold storage, and freezers.