BMT STC-3008 Dual Digital Temperature Controller 110-220V

The BMT STC-3008 is a dual-output digital temperature controller designed to provide automatic heating and cooling control based on temperature readings from an NTC temperature sensor. It features two independent relay channels, allowing separate heating and cooling equipment to be controlled from one temperature control system.

With a wide temperature measurement range of -55 C to 120 C, the STC-3008 can be used in a variety of temperature-management applications. The controller can switch between heating and cooling modes, allowing users to configure the appropriate control function for the connected equipment.

The controller uses adjustable temperature settings and differential values to determine when the connected relay outputs should switch. This allows the system to maintain a desired temperature range rather than simply switching the load on and off at one fixed temperature.

A digital display provides convenient temperature monitoring, while the built-in temperature calibration function allows the displayed temperature to be adjusted when required. The controller also incorporates compressor/refrigeration output delay protection, helping prevent rapid cycling of refrigeration equipment.

The STC-3008 also provides an alarm function for situations where the measured temperature exceeds the configured temperature limits or when a temperature sensor error is detected.

Features

• Dual-channel digital temperature controller.
• Designed for simultaneous heating and cooling control.
• Two independent relay outputs.
• Adjustable temperature setting value.
• Adjustable temperature differential value.
• Heating and cooling operating modes.
• Wide -55 C to 120 C temperature measurement range.
• Temperature resolution of 0.1 C.
• Temperature control accuracy of approximately 1 C.
• Built-in temperature calibration function.
• Refrigeration control output delay protection.
• High- and low-temperature alarm functionality.
• Sensor fault/error alarm.
• Uses an NTC temperature sensor.
• Includes approximately 1m sensor cable.
• Suitable for a wide range of temperature-control applications.
• AC 110-220V power supply.

Specifications

• Product Code: BMT STC-3008
• Model: STC-3008
• Product Type: Dual Digital Thermostat Temperature Controller
• Control Channels: 2
• Temperature Measuring Range: -55 C to 120 C
• Temperature Resolution: 0.1 C
• Control Accuracy: 1 C
• Temperature Sensor: NTC
• Sensor Cable Length: Approximately 1m
• Power Supply: AC 110-220V
• Cooling Relay Capacity: 10A / 240VAC
• Heating Relay Capacity: 10A / 240VAC
• Working Temperature: 0 C to 50 C
• Storage Temperature: -10 C to 60 C
• Control Modes: Heating / Cooling
• Temperature Calibration: Supported
• Alarm: Temperature limit and sensor error alarm
• Refrigeration Protection: Output delay protection

Dual Heating and Cooling Control

One of the main advantages of the STC-3008 is its ability to manage both heating and cooling functions. One relay channel can be configured for a heating device while the other can be used to operate cooling equipment.

For example, a temperature-controlled enclosure could use:

• Heating output: Heating element or heater
• Cooling output: Fan, refrigeration equipment or compressor

The controller monitors the connected NTC sensor and switches the appropriate relay according to the programmed temperature settings and differential.

Temperature Differential Control

The STC-3008 allows the user to configure a temperature setting and a difference value. This provides control over the temperature range within which the connected heating or cooling equipment operates.

This type of differential control helps prevent unnecessary rapid switching of the connected load and is particularly useful in applications where maintaining a relatively stable temperature is important.

Refrigeration Protection

The built-in output delay protection is useful when the controller is operating refrigeration equipment such as compressors. Compressor-based cooling systems can require a delay between switching cycles, and the controller's delay function helps reduce rapid switching.

Always configure the controller according to the requirements of the connected refrigeration equipment.

Alarm and Sensor Protection

The STC-3008 includes temperature alarm functionality for conditions where the measured temperature exceeds the configured temperature limits. It can also indicate a temperature sensor error, helping users identify problems with the NTC probe or its connection.

This makes the controller suitable for applications where temperature monitoring and automatic control need to be combined.

Applications

The BMT STC-3008 can be used for a variety of temperature-management applications, including:

• Refrigeration systems
• Freezers and cold-storage equipment
• Heating and cooling cabinets
• Temperature-controlled enclosures
• Incubators
• Greenhouses
• Aquaculture systems
• Fermentation equipment
• Food storage applications
• Cooling fans and ventilation systems
• Heating elements
• DIY temperature-control projects
• Industrial and workshop temperature control
• Electronic equipment enclosures

Installation and Safety

The STC-3008 operates from AC 110-220V and its relay contacts can switch loads up to the specified 10A at 240VAC rating. Mains-voltage wiring should only be performed by a suitably qualified person.

Do not exceed the specified relay ratings. For loads with high starting currents, such as compressors or motors, an appropriately rated contactor or relay may be required rather than connecting the load directly to the controller relay.

The supplied NTC temperature sensor should be positioned where an accurate representation of the temperature being controlled can be obtained. Keep the sensor and its wiring protected from mechanical damage and unsuitable environmental conditions.

What's in the box
1 x BMT STC-3008 Dual Digital Temperature Controller
1 x NTC Temperature Sensor with approximately 1m Cable