4-Inch Color Screen Thermostats

Hot Products

4-Inch Smart Electric Heating Thermostat

Premium 4-Inch Smart Thermostat with High-Load (16A), Tuya WIFI, and Dual-Sensor Control for Electric Floor Heating.

SAS965FHL-7-WIFI(TY)
Universal VAV HMI 4-inch Color Display Dedicated OEM Interface

Premium 4-inch color VAV interface with 7-day rapid OEM UI customization.

SAS965HMI
4-Inch Color Screen Modbus Reversible HP Controller

4" Color Screen Modbus Controller for EU reversible HP: Anti-condensation, A+++ comfort.

SAS965FCH
4-Inch Color Screen Heat Pump Controller

Heat pump controller with Wi-Fi remote control, adaptable to diverse heat pump control logic for OEMs.

SAS965-DWM
4-Inch Color Screen IAQ Controller

4-inch IAQ (4-in-1 sensor), HD interface. OEM/ODM ready, compatible with AC/DC/EC motors for fresh air systems.

SAS965-IAQ
4-Inch Color Screen VRF Controller

Professional VRF controller with seamless BMS and smart Wi-Fi integration, ensuring precise control.

SAS965XK
4-Inch Color Screen RTU Thermostat

Premium 4-inch RTU Thermostat for Multi-Stage H/C, Economizer Control, and Universal DX System Compatibility.

SAS965MTW-7RS-485-WIFI
4-Inch Color Screen EC Fan Coil Unit Thermostat

Premium 4-inch Color Screen EC FCU Thermostat for energy-efficient, low-noise control via 0-10V/Modbus in smart buildings.

SAS965FCU/PIT-EC Series
4-Inch Color Screen AC FCU Thermostat

Reliable 3-speed AC FCU thermostat (10A): Dual valve (On/Off/PI) with built-in WIFI/Modbus.

SAS965PIT/FCT Series
4-Inch Smart Water Heating Thermostat

Premium 4-Inch Water Heating Thermostat: 0.1℃ Precision, Tuya WIFI, and Multi-Mode Control.

SAS965WHL-7-WIFI(TY)

Premium Ul/UX Design

Experience superior interaction with our ful-color screen, multi-language support, and dynamic animations.

SASWELL 4-Inch Color Screen Thermostats Premium UI/UX Design Diagram

Request Your Exclusive UI Design Manual: Want to see more of our exclusive

Thermostat UI design expertise? Leave your contact details, and we will send a complete "UI Interface Customization Case Collection". It features up to 20 different design styles and detailed explanations to help you make quicker decisions.

● Exclusive UI Protocol: Protect your brand identity.
● China Patent Protection: Guard against counterfeiting.

CONTACT NOW

Partial Reliability Testing Standards

Key Functions

High-Definition Touch Interaction

4-inch IPS 480*480 color screen features a thermostat touch response time of≤0.3 seconds. Enjoy smooth, non-lagging operation, perfectly suited for all 4-inch color screen thermostat usage scenarios.
Multi-Language Adaptability

Supports 10+ language switches, including mainstream languages like Chinese, English, and German. Ideal for overseas 4-inch thermostat project customization requirements.
Flexible Protocol Compatibility

Natively supports 485/BACnet protocols. Customizable for special protocols like Modbus, meeting the needs of building automation 4-inch thermostat integration.

Anti-Interference & Stable Operation

Leveraging advanced thermostat anti-interference design, our products passed 15K Welectrostatic discharge (ESD) tests and offer strong resistance to inverter interference, ensuring stable operation of your 4-inch color screen thermostat in extreme environments.
OTA (Over-the-Air) Upgrades

Want to see more of our exclusive thermostat UI design expertise? Leave your contact details, and we will send a complete "UI Interface Customization Case Collection". It features up to 20 different design styles and detailed explanations to help you make quicker decisions.

Two Custom Thermostat
Solutions

Why Choose Us?

As a dedicated touchscreen thermostat supplier and manufacturer, we are committed to providing
unparalleled quality and speed.

SASWELL 4-Inch Color Screen Thermostats Strict Production Process Diagram

Rigorous Production Process, Reliable Quality Assurance

Every 4-inch color screen thermostat is born from our strict production line. From high-precision SMT patching to stringent aging tests, every step is carefully controlled to ensure every product delivered is stable and reliable.

SASWELL 4-Inch Color Screen Thermostats Rigorous Laboratory Testing Diagram

Products Pass Strict Laboratory Testing.

We understand that reliability is the lifeline of a thermostat. For this reason, we implement thermostat reliability testing by conducting comprehensive, multi-dimensional tests in our specialized environmental laboratory...

SASWELL 4-Inch Color Screen Thermostats Capability to Fulfill Your Large-Volume Orders Diagram

Capacity to Meet Your Bulk Orders

Our robust production capacity guarantees both product quality and on-time delivery. We are fully equipped for large volume thermostat production and have extensive logistics experience for both domestic and international orders, ensuring your products arrive safely and efficiently.

Customer Case Studies

Case 1

7 Days from UI Customization to
New Product Launch

A prominent electric heating brand needed to launch a new smart thermostat with a unique brand image, but faced the challenges of high traditional costs and long R&D cycles. They chose us. Leveraging our mature electric heating platform, we bypassed the lengthy "develop from zero" process.Our team completed the exclusive 4-inch color screen thermostat UI customization and interaction development in just 7 days. The result: the client's new product launched efficiently, successfully solving the "low-cost + high-customization" dilemma and gaining a first-mover advantage.
Case 2

A 20,000-Unit Repeat Order
Why Clients Choose Us Again

Last year, we successfully delivered 10,000 AC wired controllers to a partner. Facing diverse application scenarios (schools, residential, complex construction sites) and technical challenges (single/three-phase power adaptation, inverter interference), we provided expert support and flexible solutions. This year, as their market share grew, we partnered again for a doubled 20,000-unit repeat order. Our value lies not just in high-quality products, but in building a stable supply chain to support our clients' continuous expansion.

Partnership Support

We are a China-based manufacturer empowering Global HVAC System Integrators, Equipment Manufacturers (OEMs), and Engineering Firms worldwide, providing turnkey, customized HVAC Controls and expert technical support.

Technical Support and Global Readiness

We provide full documentation, including product manuals, wiring diagrams, and Standard RS485 MODBUS Protocol documentation, with dedicated technical support for quick system integration and commissioning. All our products are designed for worldwide deployment, compatible with both 86-type and European standard junction boxes and supporting multi-language menu options.
Rapid R&D
Customization

We leverage our strong R&D capabilities to offer deep, efficient customization services. This includes Quick Color Screen UI/LOGO implementation, flexible software adjustments like module removal, and RS485 parameter tuning to efficiently meet specific product line and private label requirements.
Quality Assurance and Global Warranty

Our rigorous Quality Control ensures product reliability and longevity, demonstrated by passing tests like the 15KV ESD standard. We provide a comprehensive product quality warranty and maintain a localized quick-response mechanism to support our global partners, ensuring timely issue resolution and significantly reducing your operational and after-sales burden worldwide.

Get In Touch

Contact our friendly Customer Service team for any Question,Concern, or Suggestion. We'd love to hear from you!

Headquater hotline: +86 755 61218391

Headquater email: info@saswell.com

MENA tech support hotline: +97155 6743682

MENA tech support email: support@saswell.com

4-Inch Color Screen Thermostats

Hot Products

4-Inch Smart Electric Heating Thermostat

Universal VAV HMI 4-inch Color Display Dedicated OEM Interface

4-Inch Color Screen Modbus Reversible HP Controller

4-Inch Color Screen Heat Pump Controller

4-Inch Color Screen IAQ Controller

4-Inch Color Screen VRF Controller

4-Inch Color Screen RTU Thermostat

4-Inch Color Screen EC Fan Coil Unit Thermostat

4-Inch Color Screen AC FCU Thermostat

4-Inch Smart Water Heating Thermostat