Dual-Sensor Refrigeration Thermoregulator

Dimensions: 77 x 34.5 x 58 mm. Weight: approx. 120 g (estimated from size and plastic housing). Input: 2 independent NTC sensor inputs. Probe types supported: NTC (−50°C to +120°C) and PTC (−50°C to +150°C). Temperature measurement range: NTC probe −50°C to +110°C (−58°F to +230°F); PTC probe −55°C to +140°C (−67°F to +284°F). Display resolution: switchable between 1°C and 0.1°C. Accuracy: ±0.5°C for NTC within −30°C to +50°C; ±1°C outside that range. PTC accuracy: ±1°C within −30°C to +50°C; ±2°C elsewhere. Power supply: 230 V AC ±10%, 50/60 Hz. Relay ratings: refrigeration, defrost and fan circuits each rated at 8 A / 220 V AC. Operating temperature: −5°C to +55°C. Storage temperature: −30°C to +85°C. Relative humidity: 10–90% RH (non-condensing). Sensor cable length: 2 m (includes probe). Housing material: black + red plastic. Engineered for repeatable, maintenance-free temperature management in refrigerated systems, this thermoregulator accepts two sensor inputs and drives three independent load circuits. Its relay outputs are electrically isolated and rated for inductive compressor startup currents — a key reliability factor often overlooked in budget controllers. The front-panel switch lets users select probe type and toggle display resolution on the fly, without software or PC tools. Suited for professional retrofit projects in catering fridges, pharmacy chillers, laboratory cold storage, and homebrew fermentation setups — especially where dual-point monitoring (e.g., air vs. liquid temp) or timed defrost cycles are needed. The compact DIN-rail compatible footprint fits tight control panels, and the 2 m probe length avoids awkward extension cables that introduce noise or resistance errors.