Description
Micron TRH-4308-1 RH Cum Temperature Controller – Dual Input Humidity & Temperature Controller
The Micron TRH-4308-1 RH Cum Temperature Controller is a dual-input industrial controller designed for simultaneous monitoring and control of Relative Humidity (RH) and Temperature in process environments where both parameters need to be maintained within defined limits. Combining two measurement functions in a single compact panel-mounted instrument, the TRH-4308-1 provides a practical solution for applications requiring coordinated humidity and temperature monitoring.
The controller is designed to accept dual analog inputs, with the input configuration available as 4–20 mA dual input or 0–1 V DC dual input, as specified by the user at the time of ordering. The instrument provides a 4 + 4 digit display, allowing the two measured parameters to be presented clearly for convenient operator monitoring.
The TRH-4308-1 provides a configurable display range of 0–4000 counts, including configurable decimal-point positioning. This allows the instrument to represent different engineering ranges according to the connected RH and temperature sensors or transmitters.
An integrated 24 V DC auxiliary supply rated at 50 mA is provided for compatible sensor supply requirements. This can simplify panel wiring by allowing suitable external sensors or transmitters to receive their required supply directly from the controller.
Separate set points are provided for RH and Temperature, enabling independent control of each parameter. The controller uses ON-OFF control action, making it suitable for applications where humidifiers, dehumidifiers, heaters, coolers, fans, or other equipment need to be switched according to predetermined humidity and temperature conditions.
The TRH-4308-1 is particularly suitable for industrial environmental monitoring, HVAC systems, laboratories, storage areas, pharmaceutical environments, food processing, textile applications, warehouses, incubation systems, clean areas, drying systems, and other processes where temperature and humidity must be monitored together.
Dual Parameter Monitoring
One of the primary advantages of the Micron TRH-4308-1 is its ability to monitor two process parameters through one controller.
Instead of installing separate controllers for temperature and relative humidity, the TRH-4308-1 combines both functions into a single panel instrument.
This can provide benefits such as:
- Reduced panel space requirements
- Centralized parameter monitoring
- Simplified operator interaction
- Reduced instrumentation complexity
- Separate RH and temperature set points
- Convenient control of environmental conditions
The dual-input configuration makes the controller particularly useful where temperature and humidity are interdependent process conditions.
Temperature and Relative Humidity Control
Temperature and relative humidity are critical parameters in many industrial and commercial processes.
For example, excessive humidity may affect product quality, storage conditions, electronic equipment, materials, or manufacturing processes. Similarly, temperature variations can influence product stability, machine performance, drying processes, and environmental conditions.
The TRH-4308-1 allows both parameters to be monitored and controlled independently using separate set points.
The RH set point can be used to operate suitable humidification or dehumidification equipment.
The Temperature set point can be used to operate suitable heating or cooling equipment.
This makes the instrument suitable for basic environmental control systems.
Dual Analog Inputs
The TRH-4308-1 supports dual analog input configurations.
Available configurations include:
- 4–20 mA Dual Input
- 0–1 V DC Dual Input
The required input configuration should be specified by the user at the time of ordering because the instrument is configured according to the selected input.
These industrial signal standards are commonly used with transmitters and sensors in process-control applications.
Suitable transmitters may provide separate analog signals representing:
Channel 1 → Temperature
Channel 2 → Relative Humidity
The controller then processes these signals and displays the corresponding values.
4 + 4 Digit Display
The TRH-4308-1 features a 4 + 4 digit display.
The dual display arrangement provides convenient visualization of the two measured parameters.
Depending on the selected configuration, one display section can be used for the temperature value while the other displays relative humidity.
This makes it easier for operators to monitor both parameters without switching between multiple instruments.
The clear digital indication is especially useful in control panels where operators need to observe environmental conditions continuously.
Configurable 0–4000 Count Range
The controller provides a configurable range of:
0–4000 counts
The display can also be configured with the required decimal-point position.
This allows the instrument to accommodate different engineering ranges from connected sensors and transmitters.
For example, a sensor signal can be scaled so that the controller displays the appropriate process value rather than simply showing the raw electrical signal.
Configurable scaling provides flexibility for different sensor ranges and applications.
24V DC Auxiliary Sensor Supply
The TRH-4308-1 incorporates an integrated:
24 V DC auxiliary supply, 50 mA
This supply can be used to power compatible sensors or transmitters within the specified current capacity.
Having an auxiliary supply within the controller can simplify the overall installation and reduce the requirement for a separate low-power DC supply in suitable applications.
The connected sensor/transmitter must be checked to ensure that its voltage and current requirements are compatible with the specified auxiliary supply.
Separate RH and Temperature Set Points
The instrument provides:
- 1 set point for Relative Humidity
- 1 set point for Temperature
This allows each parameter to have its own control threshold.
For example, in a controlled storage environment:
Temperature Set Point → Controls Heater/Cooler
RH Set Point → Controls Humidifier/Dehumidifier
The separate set points allow both environmental parameters to be managed within the same control system.
ON-OFF Control Action
The specified control action for the TRH-4308-1 is ON-OFF.
ON-OFF control is widely used where equipment needs to be switched according to whether a measured process value is above or below a specified set point.
For example, when temperature falls below the configured temperature set point, the heating equipment can be switched ON. When the required condition is reached, the output can switch OFF according to the controller’s operating configuration.
Similarly, an RH control output can be used with suitable humidification or dehumidification equipment.
This simple control method is appropriate for many environmental and process applications.
Suitable for HVAC and Environmental Control
The TRH-4308-1 can be integrated into suitable HVAC and environmental-control systems.
Applications can include monitoring and controlling:
- Temperature
- Relative humidity
- Air-conditioning environments
- Ventilation systems
- Humidification systems
- Dehumidification systems
- Heating systems
- Cooling systems
The combined temperature and RH measurement makes the instrument useful where environmental conditions must be monitored continuously.
Pharmaceutical and Laboratory Applications
Temperature and humidity control is important in many laboratory and pharmaceutical environments.
The TRH-4308-1 can be considered for suitable applications such as:
- Storage areas
- Controlled rooms
- Laboratories
- Environmental chambers
- Material storage
- Production environments
- Testing areas
The actual suitability of the controller for a regulated application should be evaluated according to the required validation, accuracy, certification, and process-control requirements.
Food and Storage Applications
Humidity and temperature can significantly affect stored materials and products.
The TRH-4308-1 may be used in suitable storage and processing environments for monitoring environmental conditions.
Potential applications include:
- Food storage
- Cold rooms
- Warehouses
- Drying areas
- Packaging environments
- Controlled storage rooms
- Agricultural storage systems
By monitoring both parameters from a single instrument, operators can obtain a centralized view of the environmental condition.
Industrial Applications
The Micron TRH-4308-1 can be used in numerous industrial applications, including:
- HVAC systems
- Environmental chambers
- Industrial drying equipment
- Storage systems
- Warehouses
- Food processing
- Pharmaceutical environments
- Textile industry
- Laboratories
- Incubation systems
- Climate-controlled rooms
- Manufacturing processes
- Process plants
- Industrial automation systems
Compact Panel-Mounting Design
The specified panel size is:
96 × 96 mm
The detailed specification also lists an instrument depth of approximately 115 mm for the analog-input configuration.
This standard panel format allows the TRH-4308-1 to be integrated into many industrial control panels.
Its panel-mounted construction provides convenient front-panel access for operators and keeps temperature and humidity monitoring centralized within the control system.
Key Features and Benefits
The Micron TRH-4308-1 offers:
- Dual RH and temperature measurement
- Dual analog input
- 4–20 mA dual input option
- 0–1 V DC dual input option
- Factory/configuration-specific input selection
- 4 + 4 digit display
- 0–4000 configurable counts
- Configurable decimal point
- 24 V DC auxiliary sensor supply
- Auxiliary supply rated at 50 mA
- Separate RH set point
- Separate temperature set point
- ON-OFF control action
- Compact 96 × 96 mm panel format
- Centralized temperature and humidity monitoring
- Suitable for industrial and environmental applications
Why Choose Micron TRH-4308-1?
The Micron TRH-4308-1 RH Cum Temperature Controller is a convenient solution for applications where temperature and relative humidity must be monitored and controlled together.
Combining dual-input measurement, dual display, independent RH and temperature set points, and an integrated auxiliary supply into one instrument helps simplify instrumentation requirements.
Its compatibility with commonly used 4–20 mA and 0–1 V DC signal configurations allows it to be integrated with suitable industrial RH and temperature transmitters.
The configurable 0–4000 count display and decimal-point setting further increase application flexibility.
For control-panel manufacturers, OEMs, automation engineers, process engineers, HVAC professionals, and industrial users, the TRH-4308-1 provides a practical platform for combined environmental parameter monitoring and ON-OFF control.
Conclusion
The Micron TRH-4308-1 RH Cum Temperature Controller is designed for applications where simultaneous monitoring and control of relative humidity and temperature is required. Its dual-input architecture, 4 + 4 digit display, configurable 0–4000 count range, independent RH and temperature set points, and ON-OFF control action make it suitable for a wide range of environmental and industrial processes.
With a built-in 24 V DC, 50 mA auxiliary supply in the specified analog-input configuration, the controller can also support compatible sensor/transmitter installations while helping simplify control-panel wiring.
From HVAC systems and controlled storage environments to laboratories, food processing, pharmaceutical applications, industrial drying, and manufacturing processes, the TRH-4308-1 provides a centralized solution for temperature and humidity monitoring and basic control.
For applications requiring dependable dual-parameter instrumentation in a compact 96 × 96 mm panel-mounted format, the Micron TRH-4308-1 is a practical choice for industrial temperature and relative humidity control.
Japsin Instrumentation – Since 1974
