In the world of smart electronics, knowing the position of a device is just as important as knowing its location. Whether it is a space heater that must shut off if it tips over, or a smartwatch that wakes up when you lift your wrist, tilt detection is a critical safety and usability feature.

Meet the KD1908S, a high-precision SMD Angle Sensor designed to detect tilt in any direction. With its compact footprint and customizable angle thresholds, it is the ideal replacement for bulky, traditional mercury switches or mechanical balls.

What is the KD1908S?

TheKD1908S is a surface-mount (SMD) tilt switch. Inside its miniature package lies a precision metal ball structure, sealed via vacuum technology within high-grade polymer materials.

Unlike vibration sensors that detect momentary shocks, the KD1908S is designed to detect state changes in orientation.

• Horizontal Position (Rest): The switch is in a “Normally Open” (OFF) state. This simple logic makes circuit design straightforward—no current flows when the device is sitting flat.
• Tilted Position (Action): When the device tilts in any direction beyond a specific threshold, the internal mechanism bridges the contact, closing the circuit to trigger a signal.

Key Features for Product Designers

1. Customizable Tilt Angles

One size does not fit all. A smart iron might need a shallow tilt angle to detect use, while a space heater needs a steep angle to detect a fall. The KD1908S series can be customized to trigger at specific angles, such as 15°, 30°, 45°, 60°, or 75°. This flexibility allows engineers to tailor the sensor exactly to the application’s safety requirements.

2. 360° Omnidirectional Detection

The KD1908S provides consistent performance regardless of the direction of the fall or tilt. Whether the device tips forward, backward, or sideways, the sensor will accurately trigger the circuit.

3. Rugged & Sealed Design

Reliability is paramount. The KD1908S features:

• Vacuum Packaging: Fully sealed structure that is waterproof and dustproof.
• High Durability: Rated for a service life of 2 million cycles.
• Heat Resistance: Constructed with high-temperature materials (up to 400℃ resistance during soldering), making it perfectly safe for standard reflow soldering processes.

4. Compact SMD Footprint

Measuring just 3.45mm (L) x 3.2mm (W) x 2.8mm (H), the KD1908S is small enough to fit into wearables and IoT sensors without occupying valuable PCB space.

Essential Applications

The KD1908S is versatile, finding its home in safety systems, home automation, and medical devices:

• Home Safety (Anti-Tip Protection): Electric fans, humidifiers, air purifiers, and UV sterilization lamps. If these devices tip over, the KD1908S cuts the power instantly to prevent fire or injury.
• 智能可穿戴设备： “Lift-to-wake” functionality for smartwatches and fitness trackers.
• Medical & Elderly Care: Fall detection in intelligent crutches, smart monitoring beds, and physiotherapy instruments.
• 智能家居： Intelligent toilet lids (auto-open/close), sweeping robots (getting stuck/tipping), and smart ironing systems.
• Security & Utilities: Anti-tamper mechanisms in smart meters and intelligent manhole covers (detecting unauthorized opening).

技术规格

结论

The KD1908S combines the simplicity of a switch with the precision of a sensor. For products where orientation matters—whether for saving power or saving lives—the KD1908S delivers reliable, waterproof, and long-lasting performance in a tiny package.

Need to integrate tilt detection into your next PCB design? 联系方式 Kingdta today to request samples and discuss custom angle configurations for your project.