Product brief description
Old mechanical thermostats have two settings: too cold and not cold enough. They click, they drift, and they leave you guessing what the actual temperature is inside your cabinet. This digital controller eliminates the guesswork. The bright blue backlit LCD shows both the current cabinet temperature and your target set point simultaneously — you see exactly what's happening at a glance. Six touch-sensitive buttons give you direct control over temperature adjustment, interior lighting, and panel lock, while the three-stage snowflake cooling indicator shows you the compressor's activity level in real time. Sleek, accurate, and built for commercial-grade reliability — it's the brain your refrigeration system has been missing.
Product detailed description
Precision Where Mechanical Thermostats Fail
Mechanical thermostats use a gas-filled capillary bulb and a diaphragm — a design that hasn't changed fundamentally in 60 years. The problem: temperature drift. As the diaphragm ages, the set point creeps. A thermostat set to 5°C slowly becomes 7°C, then 9°C — and the user never knows until the product spoils. This digital controller uses a precision NTC thermistor sensor and microprocessor-based PID logic to maintain temperature within ±1°C of the set point, year after year, with zero mechanical wear. The temperature you set is the temperature you get — every single cycle.
Dual-Zone Display — No More Guessing
The split-screen LCD is the single most useful feature on any digital thermostat. Left side: current cabinet temperature, updated in real time. Right side: the target set point you've programmed. No cycling through menus to check what you set. No holding buttons to reveal a hidden setting. What you see is what you have, and what you want. This dual-display design reduces service calls — when a customer calls to say "my fridge isn't cold enough," you can ask them to read both numbers off the display and diagnose the issue over the phone.
Three Snowflakes — Cooling at a Glance
The three snowflake icons below each temperature readout are not decoration — they're a real-time compressor load indicator. One snowflake: light cooling, compressor cycling normally. Two snowflakes: moderate load. Three snowflakes: heavy cooling demand, compressor running continuously. This visual feedback helps technicians verify system performance without hooking up gauges, and gives end users confidence that the system is actively working. It also serves as an early warning — if the cabinet is stuck at three snowflakes and the temperature isn't dropping, the door gasket, refrigerant charge, or condenser coil needs attention.
Touch Control — Clean, Sealed, Hygienic
Mechanical knobs and push-buttons collect dust, grease, and bacteria in commercial kitchen environments. The touch-sensitive interface on this controller is a completely flat, sealed surface. No crevices for contaminants. No mechanical parts to jam. The buttons respond to a light touch — not a press, not a click — making operation effortless even with wet or gloved hands. The key lock function (middle-left button) disables all other inputs, preventing accidental temperature changes from cleaning staff, customers, or curious children.
Built-In Light Control — Simplify Your Wiring
In a typical wine cooler or display fridge, the interior light requires a separate door switch, separate wiring, and a separate mounting location. This controller integrates the light switch directly into the panel — the top-left button toggles cabinet lighting on and off. One less component to source, wire, and fail. For OEM manufacturers, this reduces bill-of-materials cost and assembly time. For service technicians, it eliminates a common point of failure — mechanical door switches that corrode in humid refrigeration environments.
Commercial-Grade Temperature Range
With a control range from -50°C to +99°C, this thermostat covers the full spectrum of refrigeration and heating applications: deep-freeze storage at -40°C, commercial freezer cabinets at -18°C, wine coolers at 12°C, and ambient display cabinets at 25°C. The sensor is compatible with standard NTC probes (10K, 25°C), with cable extensions available for remote sensor placement up to 5 meters from the controller. For cold rooms where the controller is mounted outside and the sensor is inside the room, simply extend the sensor cable — the digital signal isn't affected by cable length within the rated range.
Product Specifications
AMETER |
SPECIFICATION |
Model |
RETEK-DTC-2000 (Digital Temperature Controller) |
Display |
Dual-zone blue backlit LCD |
Control Type |
Microprocessor-based PID, NTC sensor input |
Temperature Range |
-50°C to +99°C (display and control) |
Accuracy |
±1°C |
Resolution |
1°C (0.1°C optional) |
Sensor Type |
NTC thermistor, 10K at 25°C |
Sensor Cable Length |
1.5 m (standard), extendable to 5 m |
Control Output |
Relay, 10A / 250VAC (compressor) |
Cooling Indicator |
3-stage snowflake icon (low / medium / high load) |
Buttons |
6 touch-sensitive: Up, Down, SET, Light, Lock, Power |
Panel Material |
Glossy black ABS + PC, IP54 front seal |
Panel Dimensions |
160 mm × 60 mm × 12 mm (W × H × D) |
Cutout Dimensions |
142 mm × 48 mm (W × H) |
Mounting |
Flush panel mount with rear clips |
Power Supply |
220–240VAC, 50/60Hz (110VAC available on request) |
Relay Rating |
10A resistive, 1/2 HP inductive |
Key Lock |
Yes — prevents unauthorized setting changes |
Interior Light Switch |
Yes — integrated toggle (relay output) |
Operating Temperature (controller) |
-10°C to +60°C |
Operating Humidity |
20%–85% RH (non-condensing) |
Certifications |
CE, RoHS, ISO 9001 |
MOQ |
100 units (sample orders accepted) |
OEM/ODM |
Custom logo, button layout, temperature range, probe type (MOQ 500 units) |
Lead Time |
7–15 days (sample), 20–30 days (bulk) |
Warranty |
2 years against manufacturing defects |
Payment Terms |
T/T, L/C at sight, Western Union |
FAQ
Q1: What is the difference between this digital thermostat and a mechanical thermostat?
A: Three key differences: (1) Accuracy — digital maintains ±1°C vs. ±3–5°C for mechanical thermostats, which drift with age. (2) Visibility — the dual-zone LCD shows both current temperature and set point simultaneously; a mechanical thermostat shows nothing. (3) Features — this controller includes a lock function, interior light control, and compressor load indicators that mechanical thermostats cannot provide. If precise temperature control matters for your product quality or energy costs, digital is the only choice.
Q2: Can this controller be used for both cooling and heating applications?
A: Yes. The wide temperature range (-50°C to +99°C) covers both cooling (refrigeration, freezers) and heating (heated display cabinets, proofing cabinets). The output relay switches the compressor or heater on and off based on the set point and differential. For heating applications, the controller energizes the output when the temperature drops below the set point. The SET button allows you to configure heating or cooling mode — refer to the user manual for programming instructions.
Q3: How do I install the controller in a cabinet or cold room panel?
A: The controller is flush-mount: (1) Cut a rectangular opening in your panel using the cutout template (142mm × 48mm). (2) Slide the controller into the cutout from the front. (3) Secure from behind using the included mounting clips — no screws visible from the front. (4) Wire the power supply (L, N), compressor relay (C, NO), and sensor probe to the rear terminal block. (5) Position the NTC sensor inside the refrigerated compartment, away from the evaporator and door. (6) Power on and configure the set point. The entire installation takes under 15 minutes for an experienced technician.
Q4: Can the NTC sensor be extended or replaced?
A: Yes. The standard sensor cable is 1.5 meters and can be extended up to 5 meters using two-conductor shielded cable — twist and solder the connections, then seal with heat-shrink tubing. The digital signal is not affected by cable length within the rated range. If the sensor is damaged or lost, any standard NTC 10K thermistor (25°C reference) with a B-value of 3435K is compatible. Replacement sensors are available from us as spare parts — order the RETEK-NTC-10K spare probe.
Q5: What happens if the sensor fails or is disconnected?
A: The controller detects a sensor fault (open circuit or short circuit) and displays an error code on the LCD ("E1" for sensor error). The compressor output is switched off to prevent uncontrolled cooling that could freeze and damage the product. This fail-safe behavior protects both the refrigeration system and the stored contents. Once the sensor is reconnected or replaced, normal operation resumes immediately — no reset or reprogramming required.
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