Samwon Humidity Controller SU503-BN

Introduction – Samwon Humidity Controller SU503-BN

The Samwon Humidity Controller SU503-BN is a precise digital controller designed for accurate humidity measurement and reliable control in industrial and commercial environments. Using a built-in capacitive HUM sensor, it ensures consistent and accurate readings across the full 0–100% RH range. Its robust design and high-performance relay output make it suitable for demanding processes requiring stable humidity conditions.

This controller features intuitive digital adjustment, allowing operators to manage setpoints and configurations quickly and accurately. With selectable direct and reverse ON/OFF control, it can be tailored to different system requirements, providing operational flexibility for a wide range of applications. The device also integrates sensor input compensation to enhance accuracy, particularly in installations where cable length or sensor aging may introduce minor errors.

In facilities across manufacturing, storage, and environmental control, maintaining stable humidity is critical. The SU503-BN supports this need with features such as an adjustable hysteresis range, delay timer, and setting lock, ensuring reliable long-term performance. Dubai Sensor serves the region with dependable access to the SU503-BN for industrial users in the UAE and the broader MENA market.

Designed for easy integration into existing control panels, the SU503-BN combines reliability, precision, and user-friendly operation to meet the expectations of engineers, technicians, and facility managers seeking dependable humidity control solutions.

Key Features & Benefits

• Built-in capacitive HUM sensor for high-precision humidity measurement
  
• Wide measurement range: 0–100% RH
  
• Digital display for current humidity and setpoint values
  
• ON/OFF control with selectable direct or reverse operation
  
• Strong relay output: 10A at AC250V with over 300,000 switching cycles
  
• Adjustable hysteresis (0.1–25% RH) for stable control
  
• Sensor input compensation for improved accuracy
  
• Adjustable delay timer (0–300 seconds) to prevent rapid switching
  
• Setting lock to prevent unauthorized adjustments
  
• Low power consumption (<5W) and long service life
  

Technical Specifications – Samwon Humidity Controller SU503-BN

Applications & Industries

• Greenhouses and plant-growing rooms
  
• Food industry and storage warehouses
  
• HVAC systems in industrial and indoor environments
  
• Cold storage rooms and chemical warehouses
  
• Server rooms and electronic equipment facilities
  

These applications are common across industrial operations in the UAE and MENA region, where precise humidity control ensures safety, quality, and operational efficiency.

Installation, Commissioning & Maintenance

The SU503-BN is designed for simple integration into standard control panels using its compact housing and panel cutout size of W70 × H28 mm. Wiring is performed through screw terminals, enabling secure and straightforward connection.

During commissioning, operators can configure the humidity setpoint using the digital keys, select direct or reverse control mode, and adjust hysteresis to suit system sensitivity. The delay timer can be enabled to avoid excessive relay switching in dynamic environments. Sensor input compensation helps maintain accuracy where cable extension or sensor aging may introduce deviations.

Routine maintenance includes periodic inspection of wiring terminals, verifying sensor performance, and recalibrating or replacing the sensor as needed. Ensuring the sensor is not exposed to water droplets helps maintain long-term accuracy.

Why Choose Samwon Humidity Controller SU503-BN

The SU503-BN stands out as a reliable and accurate humidity control solution engineered for industrial and commercial use. Its built-in capacitive sensor, strong relay output, digital configuration capabilities, and protective features ensure consistent performance even in demanding applications.

Engineers and facility managers value the SU503-BN for its ease of installation, intuitive operation, and dependable long-term stability. Supported through Dubai Sensor in the regional market, the controller offers a trusted and versatile solution for humidity-sensitive environments.

Ordering Guide

1. Identify required humidity control range based on your application (0–100% RH supported).
   
2. Confirm electrical compatibility with AC100–220V supply.
   
3. Check relay output compatibility with the equipment to be controlled (10A at AC250V).
   
4. Verify panel dimensions for installation (W76 × H34 mm device, W70 × H28 mm cutout).
   
5. Select installation accessories such as shielded sensor cable if needed.
   
6. Consult Dubai Sensor as the official distributor for product availability and technical guidance (no links included).
   

FAQ

Q1: What is the measurement range of the Samwon Humidity Controller SU503-BN?
The SU503-BN measures humidity from 0 to 100% RH using its built-in capacitive HUM sensor.

Q2: What type of control output does the SU503-BN use?
It uses a 10A relay output (AC250V) with a switching life of over 300,000 cycles, suitable for direct control of connected equipment.

Q3: Can the SU503-BN operate in both humidifying and dehumidifying modes?
Yes. The controller supports ON/OFF control with selectable direct and reverse modes, allowing operation in either humidification or dehumidification systems.

Q4: How accurate is the humidity reading?
The display accuracy is ±3% RH ± 1 digit, based on the provided specifications.

Q5: Does the controller include an internal humidity sensor?
Yes. The SU503-BN includes a built-in capacitive humidity sensor for direct measurement.

Q6: What is the power supply requirement?
It operates on AC100–220V (50/60Hz) ±10% with power consumption below 5W.

Q7: How can users prevent unauthorized changes to settings?
A setting lock function is available to prevent accidental or unauthorized adjustments.

Q8: Does the SU503-BN allow calibration or compensation of sensor readings?
Yes. It supports sensor input compensation, which helps correct variations caused by cable length or sensor aging.

Q9: What is the differential (hysteresis) adjustment range?
The differential (dIF) can be set between 0.1 and 25.0% RH.

Q10: In which environments is the SU503-BN commonly used?
It is suitable for greenhouses, food storage facilities, HVAC systems, cold storage rooms, chemical warehouses, and server rooms where precise humidity control is required.

Data Sheet