Heimann HTS A-HT High-Temperature CO₂ Thermopile Series

Heimann Sensor HTS A representative; A-HT temperature specification differs official product family example — Official Heimann Sensor photo: HTS A representative; A-HT temperature specification differs; pictured family example, not every exact order variant.

High-temperature thermopile sensor elements usable in CO₂ NDIR gas-measurement modules.

Original manufacturer: Heimann Sensor.

Technology distinction: An IR emitter, filter or thermopile sensing element alone is not a calibrated complete CO₂ or gas detector. No Ex-proof finished-equipment certification is implied.

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Heimann official product family details →

Exact chip package, optical filter, field of view and temperature range require the manufacturer’s current part-number datasheet.

HTS A-HT high-temperature detector environment

A high-temperature thermopile may withstand an operating condition unavailable to the standard HTS A, but exact upper temperature, package and optical filter must be checked by HTS A-HT suffix. The detector still needs an infrared source, optical cell and measurement algorithm for CO₂ NDIR use. Do not apply the standard HTS A pictured product’s mechanical design or performance to an unconfirmed high-temperature order configuration.

HTS A-HT: 180°C detector versus optional gas-specific filter

Option / criterion	Original maker technical detail	Design implication
High-temperature sensor platform	TO-39, rated −20…+180°C operating, −40…+180°C storage	Do not substitute the ordinary HTS A’s +120°C operating limit.
Available listed detector chips	HTS A10 and A14 0.61² mm², HTS A20 1.2² mm²	Different sensitivity and electrical-noise design may alter minimum NDIR absorption signal.
Signal and time constant	A10/A14 58 V/W, <5 ms; A20 44 V/W, 10 ms	Not calibrated CO₂ ppm or complete gas-cell response.
Filter selection	Standard version supplied with F8-14 optical bandpass for temperature sensing; CO₂-specific variant on request	The stock HTS A-HT module is not automatically CO₂ selective; verify ordered filter CWL/HPBW.
Temperature reference	Pt1000 specifically listed on HTS A14; other rows show no Pt1000	Do not assume an internal thermistor or Pt1000 is present on every A-HT suffix.

Selection, integration and qualification

For a high-temperature exhaust or process gas design, ensure that optics, source, housing, electrical interconnect and any process-seal components also tolerate the actual environment. A 180°C detector chip alone cannot make the complete NDIR assembly a 180°C calibrated CO₂ transmitter or Ex-certified gas detector.

Original manufacturer references: Heimann HTS A-HT model table.