Temp Contr ETC-974 Single DC24

Description

The ETC-974 Digital Temperature Controller is a highly reliable, microcomputer-based dual-sensor thermostat designed for high-, medium-, and low-temperature refrigeration applications. Operating on a flexible low-voltage 12V–24V AC/DC range, this compact controller is engineered to manage three vital refrigeration outputs simultaneously: cooling (compressor), defrosting, and the evaporator fan.Equipped with a bright LED display and two independent NTC sensor probes, it monitors both the room temperature and the evaporator coil temperature. This allows for intelligent, optimized defrost cycles based on real-time frost buildup rather than just a fixed timer, protecting inventory and saving energy.Technical Specifications & FeaturesPower Supply: 12V–24V AC/DC $pm$10%Temperature Measuring & Control Range: $-50^circtext{C}$ to $120^circtext{C}$Dual Sensor System: Includes 2 NTC Thermistor Probes (one for ambient room temperature, one for the evaporator coil).Triple Output Relays:Compressor Relay: 8A / 220VACDefrost Relay: 8A / 220VACEvaporator Fan Relay: 8A / 220VACSafety Protocols: Built-in alarm buzzer, adjustable defrost delay times, and password protection for technician settings.Compatible Appliances & SystemsThe low-voltage 12V/24V variant of the ETC-974 is a universal controller widely used as a replacement or upgrade thermostat in mobile cooling, off-grid refrigeration, and heavy-duty commercial food storage systems:Mobile Refrigeration & Cold Chain: Ideal for refrigerated transport trucks, delivery vans, shipping containers, and RV/marine refrigerators operating on DC battery banks.Commercial Freezers & Chillers: Frequently used in commercial glass-door display freezers, supermarket open-air coolers, and beverage island displays.Cold Storage Walk-Ins: Perfect for walk-in coolers, blast freezers, and medium-to-low temperature cold rooms.Food Prep & Kitchen Equipment: Compatible with restaurant under-counter line coolers, salad prep tables, and commercial ice machines.Off-Grid Solar Cooling: Seamlessly fits into DC-coupled solar-powered vaccine refrigerators, off-grid homestead freezers, and remote agricultural storage units.⚠️ Installation Safety Notice: This specific model is designed for a low-voltage 12V–24V power supply input. Do not connect 220V mains electricity directly to the power input terminals, as this will instantly destroy the controller. However, the relay contacts are rated to switch up to 220VAC loads, allowing you to use low-voltage control logic to cycle standard high-voltage compressors and fans safely.