PIR Sensor Shortage Expected in 2027 as Automotive Demand Surges

March 28, 2026 – Supply Chain Alert: PIR Sensors Face Capacity Crunch

Supply chain analysts are warning of potential PIR sensor shortages beginning in 2027 as automotive child presence detection demand surges ahead of manufacturing capacity expansion. The warning comes as multiple automakers begin placing orders for 2028 model year production, which requires sensor deliveries starting in mid-2027.

According to industry estimates, total PIR sensor demand could exceed production capacity by 15-20% in 2027-2028, leading to allocation, extended lead times, and potential price increases.

Demand Drivers

Automotive Child Presence Detection

The primary driver of the expected shortage is automotive demand for child presence detection systems:

• US Hot Cars Act: Requires child presence detection in all new passenger vehicles by 2028 model year
• EU regulation: Expected to mandate similar systems by 2029
• China regulation: Under development, expected by 2030
• Estimated automotive PIR demand by 2027: 100-120 million units
• Estimated automotive PIR demand by 2028: 150-200 million units

Automotive orders are long-cycle, with manufacturers placing orders 12-18 months in advance. Several major automakers have already placed orders for 2027 deliveries, consuming a significant portion of available capacity.

Building Automation

Building energy codes in the EU, California, and Japan are creating sustained demand for commercial occupancy sensors. This demand is expected to grow 10-15% annually through 2030.

Smart Home

Smart home adoption continues to grow, with PIR sensors becoming standard in lighting, security, and HVAC systems. This segment represents steady demand growth of 6-8% annually.

Capacity Constraints

Current global PIR sensor production capacity is estimated at 1.4-1.5 billion units per year. Major manufacturers have announced capacity expansions:

However, capacity additions are not fully online until late 2027 or 2028. The gap between demand and capacity is expected to be most acute in 2027-2028.

Lead Times and Pricing

Lead times for PIR sensors are already extending:

• Standard HC-SR501 modules: 8-10 weeks (up from 4-6 weeks in 2025)
• Panasonic EKMB series: 16-20 weeks (up from 12 weeks)
• Automotive-grade sensors: 24+ weeks for qualified parts

Analysts expect price increases of 10-20% for commodity sensors and 5-10% for premium sensors in 2027-2028.

Impact by Market Segment

Automotive OEMs

Automakers are securing long-term supply agreements with qualified suppliers. Some are considering vertical integration (producing their own sensors) to ensure supply.

Commercial Building Automation

Specifiers may need to consider alternative sensors or accept longer lead times. Dual-technology sensors may become more attractive if they can be sourced from multiple suppliers.

Smart Home Manufacturers

Consumer electronics companies may face allocation as suppliers prioritize higher-margin automotive contracts. Manufacturers with diversified supply chains will be better positioned.

DIY and Hobbyist Market

Retail availability of HC-SR501 modules may be affected, with potential price increases and intermittent shortages. Hobbyists may need to plan projects further in advance.

Recommendations for Buyers

• Forecast accurately: Place orders with longer lead times
• Qualify multiple suppliers: Don’t rely on a single source
• Consider long-term agreements: Lock in pricing and allocation
• Evaluate alternative technologies: mmWave radar where appropriate
• Design for flexibility: Use sensors that can be sourced from multiple manufacturers
• Build safety stock: Increase inventory buffers for critical applications

Conclusion

The PIR sensor industry faces unprecedented demand growth over the next three years. While manufacturers are expanding capacity, shortages and price increases are likely in the 2027-2028 timeframe. Buyers should plan accordingly and secure supply early.