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The product is intended for specialists and requires qualified and authorized personnel. The product does not include assembly/use instructions . Putting the product into operation by unqualified persons leads to the loss of the warranty according to the Terms and Conditions on the site.
The specified technical parameters (current, power, etc.) represent maximum allowable values under ideal operating conditions. For safe use and optimal lifespan, it is recommended to operate the product continuously at no more than 50% of the specified maximum values.
Digital Dual Thermostat, XK-W1088, 10A Relay, NTC 10K, 220VAC
Precise temperature control in two independent zones, ideal for heating or cooling in industrial and hobby applications. Dual red and blue LED display for quick reading, two included waterproof NTC 10K sensors, wide range from -50 to 120C with resolution 0.1C. Two 10A relays at 220VAC for direct control of heaters, fans, or pumps, with setting memory and configurable startup delay.
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The XK-W1088 dual digital thermostat combines two completely independent temperature control channels in a single housing, each with an NTC 10K sensor, LED display, and a direct 10 A relay output. It is suitable for heating or cooling applications such as aquariums, incubators, greenhouses, farms, or cold rooms, and can directly control heating elements, fans, pumps, or other loads powered at the same voltage as the module.
Each channel measures temperature with a sealed NTC 10K sensor over a range from -50 °C to 120 °C, with an accuracy of ±1 °C and a resolution of 0.1 °C. The operating mode, heating or cooling, is automatically detected from the relationship between the start and stop temperatures. For each channel, you can configure a start delay from 0 to 60 minutes, high and low temperature alarms, and sensor reading correction. Settings are stored in non-volatile memory and remain valid after power loss.
Among the main features are the red LED display for channel 1 and the blue one for channel 2, the OUT1 and OUT2 operating indicators, one pair of UP / DOWN buttons for each channel, two sealed NTC 10K sensors with a cable of approximately 1 m, and a housing with mounting ears. Power supply is 110 - 220 VAC, and the outputs are direct, meaning the same voltage as the input appears on the active output.
Specifications:
Supply voltage: 110 - 220 VAC
Maximum relay current: 10 A per channel (recommended up to 5 A for long-term use)
Model: XK-W1088
Channels: 2, independent
Output voltage: 110 - 220 VAC, dual
Output type: Direct (input voltage is available at the output)
Sensor type: NTC 10K, sealed, cable approximately 1 m
Measurement range: -50 °C - 120 °C
Accuracy: ±1 °C
Resolution: 0.1 °C
Operating mode: Heating or cooling, automatically detected
Start delay: 0 - 60 minutes for each channel
Alarms: High and low temperature
Display: Red LED (channel 1) and blue LED (channel 2)
Settings storage: Non-volatile memory
Dimensions: 75 x 55 x 30 mm
Layout:
| No. | Element | Function |
|---|---|---|
| 1 | Channel 1 operating signal | OUT1 indicator light, showing that channel 1 output is active. |
| 2 | Measured temperature channel 1 | Red LED display showing the temperature read by channel 1 sensor. |
| 3 | Set channel 1 start temperature | Channel 1 UP button. A short press displays the start temperature, and a 3-second press allows changing it. |
| 4 | Set channel 1 stop temperature | Channel 1 DOWN button. A short press displays the stop temperature, and a 3-second press allows changing it. |
| 5 | Channel 2 operating signal | OUT2 indicator light, showing that channel 2 output is active. |
| 6 | Measured temperature channel 2 | Blue LED display showing the temperature read by channel 2 sensor. |
| 7 | Set channel 2 stop temperature | Channel 2 DOWN button. A short press displays the stop temperature, and a 3-second press allows changing it. |
| 8 | Set channel 2 start temperature | Channel 2 UP button. A short press displays the start temperature, and a 3-second press allows changing it. |
| 9 | Model | The Dual Temperature Controller inscription and the XK-W1088 model on the front panel. |
| Menu code | Function | Range | Default |
|---|---|---|---|
| P0 | Channel 1 start delay | 0 - 60 minutes | 0 |
| P1 | Channel 2 start delay | 0 - 60 minutes | 0 |
| P2 | High temperature alarm | P3 - 120 °C | 120 °C |
| P3 | Low temperature alarm | -55 °C - P2 | -55 °C |
Use:
Warning: the module operates at 220 VAC mains voltage, which is dangerous and can cause severe electric shock or death. Connections must only be made with the product disconnected from the mains, by a qualified person.
The housing is common for the 12 V, 24 V, and 220 VAC versions, and the internal version is indicated by a check mark made with a marker on the housing. Check the mark before applying mains voltage.
Power the module from the 220 VAC mains through the red and black wires, and connect the loads between the yellow output wires and the black wires, according to the wiring example. Check with a multimeter, with the module disconnected, which black wire corresponds to each output.
Use insulated connectors and install the module in a closed enclosure so that no live parts are accessible. Connect the protective earth wire (green-yellow) to loads with a metal housing.
Do not exceed 10 A per channel and, for continuous operation, stay at 5 A or less. For larger loads, use a contactor.
Place each channel sensor in the area whose temperature you want to control. The sensors are sealed, but the module itself must be protected from water and condensation.
To set the start temperature, briefly press the UP button of the respective channel, then hold it for 3 seconds until the digits flash and adjust the value with UP / DOWN.
To set the stop temperature, briefly press the DOWN button of the respective channel, then hold it for 3 seconds until the digits flash and adjust the value with UP / DOWN.
Select the operating mode through the relationship between the two thresholds. If the start temperature is lower than the stop temperature, the channel operates in heating mode, and if it is higher, the channel operates in cooling mode.
For delays and alarms, press UP1 and UP2 simultaneously for 3 seconds, and P0 will appear on the display. Navigate between parameters with UP1 and adjust the values with UP2 / DOWN2, according to the table above. To exit the menu, wait a few seconds without pressing any button.
If a sensor shows a value slightly different from a reference thermometer, press UP and DOWN of the respective channel simultaneously for 3 seconds. The display will show 0.0, and the correction value can be adjusted with UP / DOWN.
To restore factory settings, with the module powered, press DOWN1 and DOWN2 simultaneously for 3 seconds. The display will show 888, then the module will enter normal operation.
Connection example:
Dimensions diagram:
- Output Type Voltage
- Closed-Open Contact
- Input Voltage
- Input Voltage Type
- AC
- Model
- XK-W1088
- Sensor type
- NTC 10K
- Maximum relay current
- 10 A
Produs destinat utilizarii in proiecte electronice, automatizari, prototipare, educatie si cercetare.
Produsul trebuie utilizat numai conform specificatiilor tehnice mentionate in descriere si/sau in documentatia produsului.
Avertismente generale de siguranta:
Nu utilizati produsul la tensiuni, curenti sau temperaturi peste valorile specificate.
Montajul si conectarea trebuie realizate de persoane cu cunostinte tehnice minime in domeniul electric/electronic.
Evitati scurtcircuitele, inversarea polaritatii si conectarea gresita a alimentarii.
Nu lasati produsul alimentat nesupravegheat in timpul testelor.
Produsul nu este jucarie si nu este destinat copiilor.
Pentru modulele electronice, se recomanda utilizarea in carcase, panouri sau montaje protejate, dupa caz.
Identificare produs:
Denumirea produsului, codul/SKU-ul si caracteristicile tehnice sunt mentionate in pagina produsului si/sau pe eticheta ambalajului.
Producator / Importator / Distribuitor:
Sigmanortec S.R.L.
Calea Bucuresti nr. 9, Targu Jiu, Gorj, Romania
E-mail: [email protected]
Website: www.sigmanortec.ro
Persoana responsabila in UE:
Sigmanortec S.R.L.
Calea Bucuresti nr. 9, Targu Jiu, Gorj, Romania
E-mail: [email protected]
Documentatie si siguranta:
Pentru informatii suplimentare, fise tehnice, declaratii de conformitate sau instructiuni, ne puteti contacta la [email protected].
The XK-W1088 dual digital thermostat is a standalone module with its own controller, which works on its own once it is powered from the mains. For this reason the tutorial uses no development board and no program. All you have to do is connect the module and set it up using the four front buttons.
The module controls two independent zones, each with its own sensor, display and relay. It is useful in projects such as an aquarium with a heater and a cooling fan, an incubator, a greenhouse or a cold room, because it can directly switch loads powered at mains voltage.
How it works:
Each sensor is an NTC 10K thermistor, meaning a resistor that has 10 kΩ at 25 °C and decreases as the temperature rises. The module measures this resistance, converts it to degrees Celsius and shows the value with a resolution of 0.1 °C, in red for channel 1 and in blue for channel 2. The stated accuracy is ±1 °C.
Each channel has two thresholds, Start and Stop, and the relationship between them selects the mode. In heating mode, Start is lower than Stop: the relay closes when the temperature drops to Start and opens when it reaches Stop. In cooling mode, Start is higher than Stop: the relay closes when the temperature rises to Start and opens when it drops to Stop. The difference between the two thresholds is the hysteresis, for example 26.0 - 24.0 = 2.0 °C, and it prevents the relay from switching too often.
The outputs are direct. When a channel's relay is closed, the channel's yellow wire has the same voltage as the module's supply and the OUT1 or OUT2 indicator is lit. When the relay is open, the output has no voltage. The load is therefore connected between the yellow wire and the black wire (N), with no other power source.
The current of a load follows from the formula I = P / U. A 100 W heater at 230 V draws approximately 100 / 230 = 0.43 A, and a small 230 VAC axial fan draws around 0.08 A. Both are well below the relay's 10 A limit, and also below the 5 A value recommended for continuous operation.
Connection:
Warning: the module works at the 220 VAC mains voltage, which can cause serious electric shock or death. Work only with the plug removed from the socket, and have the installation done by a qualified person.
The housing is common to the 12 V, 24 V and 220 VAC versions. Before applying mains voltage, check that the housing carries the marker tick for the 220 VAC version.
In the example, channel 1 controls a 100 W aquarium heater and channel 2 controls a 92 mm axial fan. The red and black supply wires go to the cable with the Schuko plug, and one yellow wire and one black wire go to each load. Seen from the front, the order of the wires is black, yellow (OUT1), black, red (L), black, yellow (OUT2). The pairing of each yellow wire with the black wire next to it comes from the product photos, so check it with a multimeter, with the module disconnected, before powering it up. We assume the black wires are joined inside, but this must be confirmed by measuring continuity.
Use insulated connectors (Wago type or terminal block) and mount the entire connection in a closed junction box. Connect the green-yellow protective earth wire to loads with a metal housing. We also recommend a 5 A fuse on the live wire as an extra protective measure. The sensors have a cable of approximately 1 m and are already connected to the module, so they need no other wires.
| Product pin | Connects to | Role |
|---|---|---|
| L (red wire) | Live L of the cable with the Schuko plug | Module power supply and voltage source for both outputs. |
| N (black wire) | Neutral N of the cable with the Schuko plug | Supply return. |
| OUT1 (yellow wire) | Live L of the heater | Direct output of channel 1, has voltage when relay 1 is closed. |
| N1 (black wire) | Neutral N of the heater | Return of the channel 1 load. |
| OUT2 (yellow wire) | Live L of the fan | Direct output of channel 2, has voltage when relay 2 is closed. |
| N2 (black wire) | Neutral N of the fan | Return of the channel 2 load. |
Configuration:
After power-up, the red display shows the temperature of sensor 1 and the blue one shows the temperature of sensor 2. Each channel is adjusted with its own UP and DOWN buttons, and the settings stay in the module's non-volatile memory even if the power is interrupted.
For the start temperature (Start), briefly press UP to see it displayed. Then keep UP pressed for 3 seconds until the digits blink, and adjust the value with UP / DOWN. For the stop temperature (Stop), do the same with the DOWN button. After a few seconds without any presses, the value is saved.
| Mode | Condition | Relay behavior |
|---|---|---|
| Heating | Start lower than Stop | Closes at the Start temperature or below it and opens at Stop. |
| Cooling | Start higher than Stop | Closes at the Start temperature or above it and opens at Stop. |
To enter the parameter menu, press UP1 and UP2 simultaneously for 3 seconds. P0 appears on the screen. Move from one parameter to another with UP1 and change the values with UP2 / DOWN2. To exit, wait a few seconds without pressing any button.
| Code | Function | Range | Default |
|---|---|---|---|
| P0 | Channel 1 start delay | 0 - 60 minutes | 0 |
| P1 | Channel 2 start delay | 0 - 60 minutes | 0 |
| P2 | High temperature alarm | P3 - 120 °C | 120 °C |
| P3 | Low temperature alarm | -55 °C - P2 | -55 °C |
The start delay is useful when you control a device that must not be restarted immediately after a shutdown, for example a compressor. Leave the value at 0 if you do not need it.
To correct the reading, compare the display with a reference thermometer. If they differ, press UP and DOWN of the respective channel simultaneously for 3 seconds. 0.0 appears on the screen, and you enter the difference with UP / DOWN. The displayed temperature is the sum of the measured value and the correction value.
To return to the factory settings, press DOWN1 and DOWN2 simultaneously for 3 seconds, with the module powered. 888 appears on the screen, and the module returns to normal operation.
Usage example:
The example controls an aquarium with two channels: channel 1 switches on the 100 W heater, and channel 2 switches on a fan that cools the surrounding air. Sensor 1 goes into the water, and sensor 2 is placed in the air around the aquarium.
For channel 1, set the start temperature to 24.0 °C and the stop temperature to 26.0 °C. Because Start is lower than Stop, the channel works in heating mode: the heater turns on when the water drops to 24.0 °C or below and turns off when it reaches 26.0 °C.
For channel 2, set the start temperature to 30.0 °C and the stop temperature to 27.0 °C. Because Start is higher than Stop, the channel works in cooling mode: the fan turns on when the air reaches 30.0 °C or above and turns off when it drops to 27.0 °C.
Check the operation. When the water is below 24.0 °C, the OUT1 indicator lights up and the heater is powered, and at 26.0 °C the indicator turns off. To test channel 2, briefly place sensor 2 in a glass of warm water above 30 °C, and the OUT2 indicator and the fan should turn on. Leave the other parameters at their default values.
Common problems:
The displays stay off. The usual cause is no voltage on the red and black wires, or an internal 12 V or 24 V version in the same housing. With the plug removed, check the connections, then the tick on the housing.
The OUT indicator is lit, but the load does not start. The load is connected between the yellow wire and the black wire, and often the corresponding black wire is not connected. With the module disconnected, check continuity and the wire pairing with the multimeter.
The channel does the opposite of what you wanted, for example the heater turns on when the temperature rises. The mode is chosen from the relationship between Start and Stop, so you have probably swapped them. For heating, Start must be lower than Stop, and for cooling it is the other way around.
The displayed temperature differs from the real one. Check that the sensor is immersed in the correct medium and compare it with a reference thermometer, then apply the correction from the 0.0 menu. If the value is absurd or does not change, check the sensor cable and its connection.
The load does not start immediately after the condition is met. You have probably set a start delay in P0 or P1. Reduce the value to 0 if you do not need it.
The relay switches too often. The Start and Stop thresholds are too close together. Increase the difference between them to get a larger hysteresis.
Limitations and tips:
The module measures between -50 °C and 120 °C, with an accuracy of ±1 °C, so it does not replace a laboratory measuring instrument. The reading correction helps bring the display to a reference value, but it does not increase the sensor's accuracy.
The outputs are direct, so both channels control loads at the same voltage as the supply and they are not separate dry contacts. The relays handle 10 A, but for continuous operation stay at 5 A or less. For motors, compressors or large loads, use a contactor controlled by the output, because the starting current is much higher than the rated one.
The module is not a safety device. If a failure of the heater or of the thermostat can cause damage, add a second, independent protective thermostat.
Going further, you can use it for an incubator with heating and ventilation, a greenhouse with heating and airing, or a cold room, using the two channels with different thresholds.
