Precision Custom Pyroelectric Detectors
At Eltec Instruments, we engineer and manufacture instrumentation-grade pyroelectric infrared detectors that deliver uncompromising reliability. Our technology is the trusted core of systems designed for the most demanding applications, where accuracy and stability are paramount.





Product Categories
Discover our comprehensive range of infrared sensing solutions, from standard detectors to custom-engineered systems for specialized applications.

- Hundreds of different models available
- Custom configurations
- Instrumentation-grade performance
- TO-5 packages with optical filters

- Long range (~500 ft.) and intermediate range (~200 ft.)
- Rugged outdoor construction
- Military and Government approved
- COTS products available

- 1 megohm to over 1 teraohm range
- Low noise and low capacitance
- Cryogenic temperature operation
- Transimpedance amplifier applications
Industries & Applications
Our infrared sensing solutions serve critical applications across multiple industries, from Homeland Security to Industrial Automation.
Why Eltec Instruments?
Precision You Can Trust. Expertise You Can Rely On
For over five decades, Eltec Instruments has been the trusted name in high-performance infrared sensing. We don't just manufacture components; we engineer the core of our customers' most critical systems.
Superior Sensing Technology at the Core
Our lithium tantalate (LiTaO3) pyroelectric detectors deliver high sensitivity, low noise, and broad spectral response, ensuring reliable, cost-effective performance in any environment without the need for cryogenic cooling.
Complete Solutions for Critical Applications
Beyond detectors, we provide a full ecosystem of components for seamless integration and guaranteed performance, trusted in safety, environmental monitoring, security, and scientific & medical applications.
Your Partner in Innovation
Your success is our mission—we pair industry-leading products with expert engineering support and rich technical resources. Choose Eltec for unmatched precision and decades of trusted partnership. Contact our team today to discuss your application.

What Our Customers Say?
Our products are trusted by military, government, and commercial organizations worldwide.
100% on-time Delivery and Quality
"Eltec has become our go-to supplier for Infrared Sensing application. In this industry, timing and quality are everything—and Eltec consistently delivers both. They’ve hit 100% on-time delivery and quality, every time."
A Leading Defense Contractor
Reliable Partner
"It’s rare to find a partner this reliable. With Eltec, we avoid problems and get better results."
OEM specializing in Industrial Gas Sensing products.
Customization to our needs
"Eltec designs infrared detectors specifically tailored to our application needs. We rely on them for rail bearing temperature monitoring—a highly safety-critical function. When it comes to this type of solution, Eltec is truly the only game in town."
Wayside Asset Protection Equipment Manufacturer for the Rail Industry
Ready to Discuss Your Sensing Needs?
Contact our technical team to learn how Eltec's infrared sensing solutions can meet your specific requirements.