The HIS2000R-0 operates as a resistive thermal emitter on the same physical principle as all HIS series devices. Electrical current through the NiCr filament raises its temperature to approximately 630 °C; the nanostructured high-emissivity surface (>0.9) then radiates energy across a broad Planck-governed spectrum spanning 2–20 µm. The gold-plated reflector surrounding the element captures rear-hemisphere radiation and redirects it forward, recovering energy that would otherwise be absorbed by the TO-8 package walls.

The 40 mm² element area is the key parameter governing total output. Radiated power scales with emitting area at constant temperature and emissivity; the step from 11 mm² to 40 mm² therefore delivers roughly 3.6× the elemental radiant flux before reflector contributions. Combined with the higher operating temperature (+30 °C versus the HIS550R series) and the reflector recovery, this produces the 1 W optical output specification.

Pulsed modulation at up to 4 Hz — slightly lower than the 6 Hz rating of the smaller HIS550R devices, reflecting the greater thermal mass of the larger element — supports lock-in detection in NDIR systems. Synchronous detection referenced to the modulation frequency rejects DC thermal background and 1/f noise, improving measurement signal-to-noise ratio and long-term baseline stability in precision instruments.

1 W Optical Output: Highest in the HIS Series

At up to 1 W of optical output, the HIS2000R-0 delivers more than five times the radiant power of the HIS550R-0 (195 mW) and more than forty times that of the SMD-class emitters. This large signal budget directly enables applications that are impractical with lower-power sources: very long optical path lengths for trace-gas detection, high-throughput spectroscopy with broad spectral coverage, and instruments with inherently lossy optical trains such as integrating spheres and diffuse-reflectance accessories.

Large 40 mm² Radiating Element

The 40 mm² NiCr filament area is the fundamental source of the HIS2000R-0’s output advantage. Larger emitting area increases both total radiant flux and source étendue, the latter being critical for efficient coupling into multipass cells, optical fibres with large numerical apertures, and large-aperture collection optics. The element’s size also improves spatial uniformity of the output beam, which benefits spectroscopic applications sensitive to source inhomogeneity.

Gold-Plated Reflector for Near-Lossless IR Recovery

Gold maintains reflectivity above 98% across the 2–20 µm band without forming infrared-absorbing oxides, making it the optimum reflector material for long-life, high-power infrared applications. The integrated reflector captures rear-hemisphere emission — a substantial fraction of total output given the large element area — and redirects it forward, contributing meaningfully to the 1 W total optical output figure.

Full 2–20 µm Spectral Access

The open-window configuration imposes no spectral cut-off, providing unobstructed access from 2 µm through to 20 µm. This encompasses the entire mid-infrared molecular fingerprint region and extends into the long-wave infrared, covering the absorption features of virtually every gas and organic compound of industrial, environmental, and analytical interest. No window material selection is required, and there is no insertion loss from window reflections or absorption.

Patented Nanostructured High-Emissivity Surface

Emissivity exceeding 0.9 ensures near-blackbody spectral behaviour, maximising the conversion of electrical power into radiant flux. The spectrally smooth output closely follows the Planck curve at 630 °C, providing a predictable, well-characterised source for quantitative spectroscopic measurements and system calibration.

Robust TO-8 Industrial Package

The TO-8 package is larger than the TO-39 / TO-5 housings used in the HIS550R series, providing greater thermal mass, improved heat dissipation at higher drive powers, and a wider flange for mechanical mounting in instrument chassis. It is a well-established package in high-power optoelectronics with standardised pin configurations and mounting hardware, simplifying integration into new and existing instrument designs.

Pulsed Operation up to 4 Hz

The 4 Hz modulation limit reflects the greater thermal mass of the 40 mm² element relative to the 11 mm² elements of the HIS550R series. Within this bandwidth, pulsed operation enables synchronous lock-in detection that rejects thermal background and 1/f noise, significantly improving measurement signal-to-noise ratio. For applications not requiring modulation, continuous-wave operation is supported up to the maximum rated power.

• Long-Path and Multi-Pass NDIR Gas Analysis: Herriott and White multipass cells for trace-gas detection of CO₂, CO, CH₄, N₂O, SO₂, NH₃, and other species at sub-ppm concentration levels, where the optical path length demands a high-power source to maintain adequate detector signal.
• FTIR and Dispersive IR Spectroscopy: Benchtop and portable FTIR spectrometers, dispersive IR instruments, and custom analytical platforms where a high-radiance broadband thermal source across the full 2–20 µm range is required.
• Industrial Process Gas Analysis: High-accuracy fixed-point and extractive gas analysers in petrochemical, pharmaceutical, steel, and cement manufacturing processes, where continuous operation at high signal levels reduces measurement uncertainty.
• Environmental and Emissions Monitoring: CEMS and stack emissions analysers requiring large signal budgets to overcome path length losses and particulate scattering in real-world industrial exhaust streams.
• Automotive and Engine Test Bench Analysis: High-precision exhaust gas analysers and engine certification test benches measuring CO, CO₂, HC, NOx, and particulate matter across multiple absorption bands simultaneously.
• Integrating Sphere and Diffuse-Reflectance Spectroscopy: Optical configurations with inherently high insertion loss that require a high-power source to maintain usable detector signal after collection efficiency penalties.
• Scientific Research and Custom Instrumentation: University and national laboratory research instruments, gas reference cell calibration systems, and optical bench experiments requiring the highest available broadband infrared output in a standard package.

United Spectrum Instruments (USI) is a specialist distributor and application partner for advanced photonics, infrared sensing, and scientific instrumentation in India. USI combines access to globally leading component technologies with deep domain expertise, supporting customers from initial product selection through OEM system integration and volume production supply.

Key reasons to work with United Spectrum Instruments:

• Access to internationally leading infrared emitter and photonics technologies
• Expert application support for high-power NDIR gas sensing, FTIR, and industrial IR system design
• OEM consultation covering component selection, optical system design, thermal management, and production ramp
• Reliable supply for evaluation samples and production quantities
• Established partnerships with leading international photonics manufacturers
• Fast, responsive technical communication and application-focused engineering guidance