Eltec Instruments · Founded 1969 · Made in the USA
Precision Infrared Sensing,
Engineered in the USA
For more than five decades, Eltec Instruments has designed and manufactured precision pyroelectric infrared detectors and sensing components for OEM manufacturers, industrial engineers, and instrumentation developers around the world.
Deep knowledge of detector physics, optical characteristics, signal conditioning, and system integration — applied to standard catalogue products and custom configurations built to your exact requirements.
Built for Engineers and OEM Development Teams
Eltec Instruments works directly with the technical and procurement teams responsible for getting infrared sensing right — from component selection through to full system integration.
OEM Manufacturers
Companies integrating infrared sensing into their own products who need consistent, application-matched components and technical depth to back them up.
Instrumentation Developers
Teams developing measurement, detection, or analytical instruments where infrared detector performance directly determines system capability.
R&D and Engineering Teams
Engineers evaluating detector options, defining optical and electronic requirements, or developing new sensing architectures who benefit from specialist knowledge.
Industrial Manufacturers
Companies requiring reliable infrared sensing for process monitoring, safety, or automation in demanding environments.
Common Infrared Sensing Challenges We Understand
Selecting and integrating an infrared detector is rarely straightforward. The challenges our customers bring to us tend to fall into recognisable patterns — and they typically require more than a datasheet to resolve.
Weak Signals in a Noisy Environment
Pyroelectric detectors produce small signals that can be difficult to distinguish from electronic noise. Getting reliable, repeatable measurements depends on understanding the full signal chain — not just the detector specification in isolation.
False Alarms and Environmental Interference
Temperature fluctuations, vibration, airflow, and unwanted radiation sources can all generate false triggers in demanding outdoor or industrial settings. Matching detector characteristics to the environment is a system-level problem.
Off-the-Shelf Products That Do Not Fit
Standard detectors may not meet your required optical window, spectral filter, package dimensions, or electronic interface. When the catalogue does not match the application, a custom approach is often the more efficient path.
OEM Integration Complexity
Combining a detector with optical filters, signal conditioning electronics, and mechanical packaging into a working assembly takes engineering time and expertise. Mistakes at this stage are costly to correct late in a development programme.
Products and Sensing Solutions
Eltec offers a focused range of precision infrared sensing products, covering standard components and complete detection solutions for OEM and industrial applications.
Precision Pyroelectric IR Detectors
Single- and multi-element pyroelectric detectors manufactured to close tolerances for use in spectroscopy, gas analysis, flame detection, motion sensing, and other demanding infrared applications. Available in a range of package configurations and spectral filter options.
IR-EYE™ PIR Detection Solutions
Eltec's IR-EYE™ range provides complete passive infrared detection solutions for OEM integration. These products combine detector elements with appropriate optics and electronics, reducing the engineering work required to deploy proven PIR sensing in your system.
High-Megohm Resistors
Specialist high-value resistors designed for use in infrared detector circuits and other low-current, high-impedance applications where standard resistor technology is not appropriate.
Custom IR Sensing Subassemblies
When standard products do not meet your requirements, Eltec engineers custom infrared sensing subassemblies that integrate detectors, optical filters, electronics, and mechanical packaging into a single, application-specific solution.
Custom IR Sensing Subassemblies for OEM Applications
When off-the-shelf infrared detectors and detection solutions cannot meet the specific optical, electronic, mechanical, or integration requirements of your application, a custom subassembly is often the most practical approach.
Eltec designs and manufactures custom IR sensing subassemblies that bring together all the elements your system requires: the pyroelectric detector element, optical filters selected for your target spectral band, signal conditioning electronics, and mechanical packaging suited to your installation and environmental constraints. The result is a component or module that arrives ready for integration into your product or instrument.
This approach is particularly relevant for OEM programmes where development time is constrained, where a bespoke optical or electronic specification is needed, or where repeatable performance across a production run matters more than lowest unit cost at the component level.
Engagement starts with your application. We ask about the measurement or detection problem you are trying to solve, the environment the detector will operate in, the signal levels and frequencies involved, and the integration constraints you are working within.
Why Engineers Work with Eltec
There are practical reasons why OEM manufacturers and instrumentation developers choose to work with Eltec Instruments rather than sourcing pyroelectric components from a general distribution catalogue.
More Than Five Decades of Pyroelectric Expertise
Eltec has been designing and manufacturing infrared sensing components since 1969. That depth of experience in a specialised technology area is not common, and it shows in the technical conversations we are able to have with our customers.
Application-Focused Technical Knowledge
Our team's knowledge spans detector physics, optical design, electronics, and system integration. We can engage with the full context of your sensing application — not just quote a specification from a datasheet.
Standard and Custom Configurations
We offer both catalogue products for straightforward requirements and custom-engineered subassemblies for applications where standard components are not sufficient. You are not forced into one path or the other.
US-Based Design and Manufacturing
All Eltec products are designed and manufactured in the United States. We serve OEM and industrial customers internationally from that base, with the quality and supply-chain visibility that US manufacturing provides.
Engineering Support for Complex Requirements
When your application involves technical considerations that influence detector selection and system design — spectral characteristics, noise floor, field of view, signal conditioning architecture — we work through those with you.
Discuss Your Application
If you are evaluating infrared sensing options for an OEM product, an industrial system, or an instrumentation development programme, we welcome the technical conversation.
Describe your application, the sensing or detection problem you are addressing, and any specific requirements — optical, electronic, mechanical, or integration-related — and we will review the details and respond with relevant technical input.
Please note: do not include confidential, proprietary, or export-controlled technical information in your initial enquiry. A general description of your application and requirements is sufficient to start a productive discussion.