1PCS temperature controller XW03K

KOEED · Process Control · Temperature Controllers · In stock

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What Is the XW03K Temperature Controller?

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The XW03K is a compact digital temperature controller that implements full PID (Proportional-Integral-Derivative) regulation with auto-tuning capability. It accepts standard industrial temperature sensor inputs — thermocouple types and RTD probes — and drives a switched output (relay or SSR logic level, depending on configuration) to hold a process at a user-defined setpoint. The front panel features a dual-row LED display showing the current process value (PV) and the target setpoint (SV) simultaneously, plus tactile membrane keys for parameter entry. This form factor is found across a wide range of heating and cooling applications: plastic extrusion barrels, laboratory ovens, packaging sealers, environmental chambers, HVAC duct heaters, and small automated thermal processing stations.

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In short: The XW03K is a PID digital temperature controller for industrial heating and cooling loops — wire your sensor, set your target temperature, run auto-tune, and the controller handles the rest. Stocked at KOEED for process engineers, maintenance teams, and machine builders.

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Key Capabilities and What They Deliver

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1. PID Control with Auto-Tuning

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What it means: Instead of simple ON/OFF hysteresis control (which swings above and below setpoint continuously), the XW03K uses a PID algorithm that calculates an output power percentage based on how far the process is from setpoint, how long it has been away, and how fast it is moving. The auto-tune function pulses the output, watches the process response, and self-calculates the optimal P, I, and D constants.
Why it matters: ON/OFF control produces temperature oscillation — the process overshoots, the heater cuts out, the process undershoots, and the cycle repeats. For processes like plastic extrusion where a 2-degree C swing changes melt viscosity and part dimensions, tight PID regulation holds within fractions of a degree once tuned.
Result: Auto-tune eliminates the trial-and-error parameter guessing that consumes hours of commissioning time. The controller learns the thermal dynamics of your specific heater-load combination and locks in stable control within a few oscillation cycles.

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2. Multi-Sensor Input Compatibility

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What it means: The XW03K accepts multiple thermocouple types (commonly K, J, S, E) and RTD probes (Pt100) through a parameter-selectable input type setting. You configure the sensor type during initial setup, and the controller applies the correct cold-junction compensation and linearization curve.
Why it matters: Different temperature ranges demand different sensor types — a Type K thermocouple for a 600-degree C oven versus a Pt100 RTD for precise 100-degree C water-bath control. A controller locked to one sensor type means stocking different controller models for different zones. Universal input eliminates that complexity.
Result: One controller part number covers all your heating zones, regardless of sensor type, simplifying spares inventory and reducing the risk of installing the wrong model on a given loop.

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3. Dual LED Display — Process Value and Setpoint at a Glance

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What it means: The upper (typically red) LED displays the current measured temperature (PV), while the lower (typically green) LED shows the target setpoint (SV). Both are visible simultaneously without scrolling through menus.
Why it matters: In a multi-zone control panel, an operator walking the line can instantly verify that each zone is at temperature by glancing at the PV display. If a zone reads low, the operator knows which heater or sensor to investigate without stopping to navigate a single-line display.
Result: Faster fault detection on the production floor, fewer undetected cold zones producing scrap, and reduced training burden for operators who need only check \"is the red number close to the green number.\"

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4. Alarm Outputs for Process Protection

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What it means: The XW03K typically provides at least one configurable alarm relay that can be set to trigger on high-deviation, low-deviation, absolute high, absolute low, or sensor-break conditions. The alarm output can drive an external indicator, sounder, or interlock relay.
Why it matters: If a heater contactor welds closed, the process will run away past setpoint — a high-deviation alarm catches this and can cut power through a safety contactor. If a thermocouple opens (infinite resistance), sensor-break alarm forces the output OFF rather than driving the heater at full power based on a falsely low (or high) reading.
Result: A safety layer independent of the control loop itself, preventing thermal runaway from a single component failure.

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Key Specifications

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Model	XW03K
Control Mode	PID + auto-tune (ON/OFF mode also selectable)
Sensor Input	Thermocouple (K, J, S, E, etc.) and RTD (Pt100) — verify supported types from label
Display	Dual LED: PV (red) + SV (green)
Output Type	Verify from product label (typically relay contact, SSR drive, or 4-20mA)
Power Supply	Verify from product label (typically 85-265V AC or 24V AC/DC)
Panel Cutout	Verify from product label / datasheet (common: 45x45mm, 68x68mm, or 92x92mm)
Alarm Output	At least 1 configurable alarm relay (verify exact count from label)
Sampling Rate	Verify from product datasheet (typically 2-4 samples/second)
SKU	376645299953
Condition	New

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Temperature controllers in this class span a wide range of input/output/power configurations. Always confirm the specific input sensor types, output type (relay vs. SSR vs. analog), supply voltage, and panel cutout dimensions from the label on the unit or the listing photos before ordering. Installing a 24V DC controller on an 85-265V AC supply will destroy the unit instantly. Contact us if the label photo is unclear — we can verify the exact configuration before shipment.

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Typical Deployment Scenarios

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• Plastics Processing: Extruder barrel zone control, injection molding nozzle heaters, thermoforming oven platens, and hot-runner manifold temperature regulation. Plastic melt temperature directly determines viscosity and part quality — tight PID control is non-negotiable.
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• Laboratory and Test Equipment: Drying ovens, muffle furnaces, water baths, incubators, and environmental test chambers. The dual display lets lab technicians confirm setpoint vs. actual at a distance without interrupting workflow.
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• Packaging Machinery: Heat-seal bar temperature control on form-fill-seal machines, shrink-wrap tunnels, and blister packaging stations. Consistent seal temperature prevents both weak seals (too cold) and film burn-through (too hot).
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• Food and Beverage Processing: Proofing cabinets, chocolate tempering tanks, deep fryer oil temperature, and pasteurization hold tubes. Many food-safety HACCP plans require continuous temperature recording — the XW03K alarm output can trigger a data logger or alert on deviation outside critical limits.
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• HVAC and Building Automation: Duct heater control, boiler water temperature regulation, and heat-recovery loop management. Relay output drives contactors or modulating valves; PID prevents the temperature hunting common with simple thermostats.
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• DIY and Hobby Projects: Home brewing mash temperature control, kiln controllers for ceramics, reflow soldering ovens for PCB assembly, and smoker/BBQ pit automation. The auto-tune function is especially valuable in these one-off builds where thermal dynamics are unknown at the start.
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Frequently Asked Questions

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\"How do I run the auto-tune on this controller for the first time?\"

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The general auto-tune procedure for the XW03K class of controller: (1) wire your sensor and output device, (2) power up and set your desired setpoint (SV), (3) enter the parameter menu and locate the auto-tune (AT) setting — typically a parameter you toggle from OFF to ON, (4) exit the menu. The AT indicator on the display will flash while the controller pulses the output and measures the thermal response. The process takes anywhere from a few minutes (small, fast-responding loads) to over an hour (large, slow thermal masses like a kiln). Do not adjust the setpoint or open the load door during auto-tune — it disrupts the response curve and produces poor PID constants. When the AT indicator stops flashing, the controller has calculated and stored P, I, and D values and is running in closed-loop PID mode. If the process oscillates or drifts after auto-tune, run it again starting from a stable temperature closer to the setpoint.

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\"Can I use this controller to drive an SSR directly, or does it need an external relay?\"

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This depends on the specific output configuration of the XW03K you receive. If the output type is \"SSR drive\" or \"logic voltage\" (typically 12V DC or 24V DC pulsed output), the controller can directly drive the input terminals of a solid-state relay — no intermediate relay needed. If the output type is \"relay\" (a dry contact that clicks audibly), it can directly switch a small heater load within its contact rating (typically 3A-5A resistive at 250V AC) or drive an external contactor coil for larger loads. Do not drive an SSR input directly from a relay-output controller without verifying compatibility — the SSR's input may draw more current than the relay contact is designed to switch at low voltage. Check the output specification on the label: \"SSR\" or \"V DC\" = direct SSR drive; \"Relay\" or \"Contact\" = mechanical relay. If you are unsure, email us a photo of the label.

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\"What temperature sensors are compatible out of the box?\"

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The XW03K typically supports multiple thermocouple types (Type K, J, S, and E are the most common) and Pt100 RTD sensors. You select the sensor type through a parameter setting in the configuration menu — the controller then uses the correct linearization table and cold-junction compensation for that type. Important wiring notes: thermocouples require thermocouple-grade extension wire all the way from the sensor to the controller terminals (do not use copper wire for part of the run — it creates an unintended cold junction at the splice). Pt100 RTDs can use standard copper wire and are typically wired in 3-wire configuration for lead resistance compensation. Polarity matters for thermocouples — reversing the + and - leads will cause the PV reading to drift in the wrong direction as temperature changes.

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\"My controller powers on but the PV display shows 'HH' or 'LL' — what does that mean?\"

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\'HH\' typically indicates a sensor over-range condition (the measured temperature exceeds the sensor type's maximum) or a broken sensor wire (open circuit — infinite resistance, which thermocouple inputs interpret as out of range). \'LL\' typically indicates under-range (temperature below the sensor type's minimum) or a shorted sensor. The most common cause is a disconnected or broken thermocouple — check continuity from the controller terminals back to the sensor. If the thermocouple reads open-circuit on a multimeter, replace it. If the sensor tests good, verify the input type parameter matches your actual sensor — a controller configured for Pt100 will read \'HH\' when connected to a Type K thermocouple because the expected resistance is completely wrong. Also check that the thermocouple extension wire polarity is correct at every junction between the sensor head and the controller terminals.

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\"What's the difference between the XW03K and other XW-series controllers?\"

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The XW series typically varies by form factor, output configuration, and feature set. Common variants within the same family may include models with different panel cutout sizes (48x48mm, 72x72mm, 96x96mm), additional alarm outputs, retransmission analog outputs (4-20mA for remote monitoring), or communication options (RS-485 Modbus). Without the manufacturer's full catalog, we cannot confidently state the exact differences between the XW03K and its siblings. If you are replacing an existing XW-series controller with a failed unit, match the exact model number printed on the old controller's label to ensure identical input, output, alarm, and power supply configuration. If the old label is illegible, send us whatever partial information you have and we will do our best to identify the correct replacement from available stock.

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