Is sNETD A Thermal Sensitivity Myth? NETD vs sNETD Explained

NETD vs sNETD Explained: Is sNETD A Thermal Sensitivity Myth?

Thermal Optics Buying Guide · Last updated June 2026 · Approx. 16 min read

The NETD vs sNETD debate is doing the rounds in the Australian thermal optics market, and a recent piece argues that sNETD has changed how serious shooters should compare thermal riflescopes. It has not. Here is the real, in-depth Australian shooter’s story on NETD vs sNETD, who actually makes the sensors, and the three things that genuinely matter when you spend serious money on a thermal optic.

Every few years, one corner of the thermal optics market invents a new specification, prints it in marketing material, and tries to convince hunters that the spec sheet they have been reading for a decade no longer means what it used to. The latest is sNETD — sometimes written sNETD, sometimes “system NETD” — promoted heavily by a single manufacturer and amplified by a handful of Australian retailers carrying that brand. The pitch: the old NETD number is misleading; trust our new one instead.

The NETD vs sNETD argument deserves a careful, honest answer. We have been building Gun Bar’s thermal authority around the Pixfra Pegasus Pro 2 LRF for the same reason serious Australian hunters have been buying it: a ≤15 mK NETD sensor — the finest in the price class — integrated rangefinding as standard, the backing of one of the world’s two largest commercial thermal imaging groups, and the most established Australian distributor in the optics market behind it. The NETD vs sNETD pitch deserves more than a one-liner reply. So here is the comprehensive Australian shooter’s guide to NETD vs sNETD, the metrics that matter, the metrics that exist to sell you a particular brand, and the three dimensions of buying a thermal optic that no spec war can paper over.

NETD figures are manufacturer-published sensor-level specifications and reflect the underlying hardware floor on each platform. Current as at June 2026; confirm current spec with the relevant seller for any specific configuration.

On the universal measure, the Pegasus Pro 2 LRF leads the field. The Pulsar Thermion 2 Pro figure is the one that tells you why a new specification was invented.

What Is NETD And Why Does Every Manufacturer Use It?

NETD stands for Noise Equivalent Temperature Difference. It is the smallest temperature difference a thermal sensor can resolve before the difference disappears into the sensor’s own electronic noise. It is measured in millikelvin (mK) — thousandths of a kelvin — and the rule is consistent across every manufacturer in the world: a lower NETD number is better.

A sensor with a NETD of ≤15 mK can resolve a temperature difference of fifteen-thousandths of a kelvin. A sensor with a NETD of <25 mK loses that detail when the difference falls below twenty-five-thousandths. In practical terms, the lower-NETD sensor pulls cleaner edges around faint heat signatures — a fox in light rain, a pig moving through cold scrub at three in the morning — while the higher-NETD sensor gives up a softer, noisier picture in exactly those conditions where it matters most.

NETD is a measure of the underlying physical hardware of the imaging sensor. It is the floor of what the system can ever achieve, before any image processing, before any software, before any algorithms. It is the equivalent of the focal length on a camera lens, or the sensor size on a digital camera body — an inherent physical capability that no amount of post-processing can manufacture out of nothing.

Every major thermal optics manufacturer reports it the same way. Pixfra reports it. HikMicro reports it. Nocpix reports it. Pulsar reports it. So does Teledyne FLIR (the U.S. defence and industrial standard), L3Harris, Lynred, and every other thermal sensor maker that operates in the commercial space. NETD is the industry-standard, universally-comparable measure of sensor sensitivity, and it has been for decades.

NETD vs sNETD: Why Did Pulsar Invent A New Metric?

sNETD — “system NETD,” sometimes written sNETD — was introduced by Pulsar in 2023 as a marketing specification specifically for their Pulsar Thermion 2 Pro range. The argument made in support of it is that traditional sensor NETD only measures the raw hardware sensor, while sNETD measures the “whole system” performance after Pulsar’s image processing, filters and algorithms have done their work.

That sounds reasonable on the surface. Image processing does improve picture quality. So far, so technical. Here is where it stops sounding reasonable, and where any serious thermal buyer should pause:

No other major manufacturer reports sNETD. Not Pixfra. Not HikMicro. Not Nocpix. Not FLIR. Not Lynred. Not Teledyne. Not Bosch. It is a Pulsar-specific metric promoted in Pulsar marketing material, and amplified by retailers who sell Pulsar.

There is no published independent test protocol for sNETD. Sensor NETD is defined and measured against standardised test setups — blackbody source, controlled emissivity, specific atmospheric conditions, defined frame rates and integration times. The methodology is published, repeatable and auditable by third parties. sNETD has no equivalent published protocol. You cannot independently verify a manufacturer’s sNETD claim because the manufacturer has not published the methodology used to derive it.

sNETD was introduced after Pulsar’s sensor NETD looked unfavourable against competition. The Thermion 2 Pro range runs a published sensor NETD of <25 mK — compared to Pixfra’s ≤15 mK, Nocpix’s ≤18 mK, and HikMicro’s ≤20 mK. On the universally-comparable measure, the Pulsar Thermion 2 Pro sits last in its competitive set. The sNETD metric, with its much smaller reported figures and no third-party verification, allows Pulsar marketing material to suggest the gap is smaller than the sensor NETD would imply.

In short: sNETD is, by all available evidence, a marketing specification invented to solve a marketing problem. We are not the only people in the industry saying so — it is a recurring theme on thermal-imaging engineering forums and among independent reviewers comparing the published sensor figures with the sNETD claims and finding the methodology nowhere.

Can Image Processing Make Up For A Higher-NETD Sensor?

This is the question the NETD vs sNETD argument is really making, and the honest, technical answer is: partially, and only up to a point.

Image processing can do real, useful work on a thermal feed. Noise reduction algorithms can smooth out random electronic noise, making the image look cleaner. Edge enhancement can sharpen contrast around hot objects. Pixel correction can patch over bad sensor elements. Local tone-mapping can brighten faint signatures in dim scenes. All of this is legitimate engineering, and Pulsar’s image processing is genuinely good — nobody at Gun Bar is going to argue otherwise.

But there is a fundamental limit. Image processing cannot create information that the sensor never captured. If the underlying hardware floor is <25 mK, then by definition the sensor literally cannot tell apart temperature differences smaller than that. No amount of clever software brings information into existence. Processing can only work with what the sensor already detected.

In practical hunting terms: on a strong, hot heat signature against a cold background — a pig at thirty metres on a frosty morning — both a 15 mK Pixfra sensor and a 25 mK Pulsar sensor will produce a usable, identifiable image. The image-processing of either will give you something you can confidently shoot. The sNETD argument lands closest to the truth in this scenario.

But on a marginal night — warm air, light rain, a fox slipping through scrub at body temperature against a background only a few degrees colder — the sensor with the finer NETD floor is the one still drawing a clean, identifiable edge around the animal. The higher-NETD sensor reaches its noise floor and the signature softens into the background. That is the moment that matters — the moment a thermal scope earns its asking price. And in that moment, the underlying hardware sensitivity wins, every time.

The fair summary: image processing is real, useful, and meaningfully closes the gap in good conditions. But it cannot beat physics. The Pixfra sensor’s lower NETD floor remains the better hardware in the conditions that genuinely test a thermal optic.

Who Actually Makes The Thermal Sensors Inside Each Brand?

If you have spent any time in the thermal market, you may have noticed that the conversation rarely names the actual sensor manufacturers behind the scope brands you see on the shelf. There is a reason for that. The global thermal imaging market is dominated by a small number of very large industrial manufacturers, and the brand on the riflescope on your local shop floor is not always the company that built the sensor inside it. Here is the honest map across the four major Australian thermal riflescope brands.

HikMicro is the thermal sporting brand of Hikvision — a publicly-listed Chinese industrial group with FY2024 revenue of approximately USD $13.4 billion, around 58,000 employees globally, and roughly 34% share of the world surveillance camera market. Hikvision manufactures its own thermal imaging sensors as a fully vertically-integrated operation.

Pixfra is the thermal sporting brand of Dahua Technology — a publicly-listed Chinese industrial group with FY2024 revenue of approximately USD $4.5 billion, around 20,000 employees globally, and roughly 16% share of the world surveillance camera market. Dahua also manufactures its own thermal imaging sensors as a fully vertically-integrated operation.

Hikvision and Dahua sit alongside each other as the world’s two largest commercial thermal imaging groups. Both are diversified industrial conglomerates with multiple subsidiary brands (HikRobot, EZVIZ and HikAutomotive at Hikvision; Imou, iRAYPLE and Pixfra at Dahua) operating across thermal, surveillance, robotics and consumer imaging. Both are an entirely different scale of operation from any European or American specialist optics house. The Pegasus Pro 2 LRF and the HikMicro Stellar both carry the engineering weight of one of the two largest thermal R&D operations on earth — and that, more than any spec war, is the underlying reason both ranges out-spec the specialist competition.

Nocpix is a sister brand of InfiRay Outdoor, both owned by Yantai IRay Technology Co., itself a subsidiary of Raytron Technology — another Chinese thermal sensor manufacturer. Raytron does design and manufacture its own sensors. There is one important matter of public record that Australian buyers should be aware of: on 1 May 2024 the U.S. Department of State sanctioned Yantai IRay Technology Co. for “developing and supplying dual-use aerospace, manufacturing, and technology equipment to entities based in Russia.” InfiRay’s product lines have progressively transitioned to the Nocpix brand since then. This is a publicly-recorded U.S. State Department designation; we mention it because it is a factor any Australian buyer of an InfiRay/Nocpix-platform thermal scope should be aware of when assessing long-term supply, support and resale.

Pulsar is a brand of Yukon Advanced Optics, a specialist optics integrator headquartered in Vilnius, Lithuania. Crucially: Pulsar does not manufacture its own thermal imaging sensors. The thermal sensor inside a Pulsar Thermion riflescope is sourced from a third-party sensor manufacturer. Yukon’s engineering work is on the optical chain, the housing, the image processing software and the user interface — all of which is genuine, competent, and in some respects industry-leading. But the underlying thermal sensor that determines the published NETD figure is not Yukon’s own engineering. It is bought.

Why Pulsar’s Sensor Sourcing Matters: The Smartphone Industry Analogy

If you have followed the smartphone industry through the first two decades of this century, the analogy is direct and instructive.

The market was dominated, then and now, by the two vertically-integrated giants — Apple and Samsung — who own the chip, the operating system, the manufacturing, the brand and the consumer relationship as a single integrated supply chain. In thermal imaging today, the equivalents are Hikvision and Dahua. They make the sensor, the image processing, the housing and the consumer brand. They are the Apple and Samsung of thermal.

Google entered the smartphone market with its own Pixel handsets and its own sensor and silicon work — a third major player making the underlying technology. In thermal, InfiRay/Raytron and the Nocpix brand occupy that role — a competitor that does make its own sensors, but is now operating under the constraints of the May 2024 U.S. State Department sanctions designation.

And then there is BlackBerry — a respected, premium-priced brand from an earlier era, still in the market, idolised by its loyal users, but never the company that actually made the underlying technology the device depended on. In thermal imaging today, Pulsar occupies that position. A premium-priced specialist integrator, idolised by a loyal user base, sourcing the underlying thermal sensor from outside its own engineering.

The smartphone race headed in one direction, and the historical record now shows us where that direction was. The thermal imaging race is heading the same way, and the same logic applies. The companies that own the sensor will outperform the companies that buy the sensor — over time, on the spec sheet, and on the price.

This is part of why Pulsar buyers tend to idolise the brand. Premium pricing creates a consumer instinct that more money buys better technology. With a vertically-integrated thermal manufacturer that instinct is roughly correct — more budget gets you a finer sensor from the same supply chain. With an integrator sourcing sensors from outside, premium pricing is buying the badge, the image processing, the user interface and the marketing — not necessarily a fundamentally better sensor than the lower-priced product from the company that actually built the underlying thermal hardware. That is exactly what the universal NETD comparison shows: the Pulsar Thermion 2 Pro sensor NETD floor is the worst in the competitive set, despite the highest price tag.

Why Distributor Capability Matters: The Australian Thermal Distributor Landscape

Here is the part the spec-sheet arguments tend to skip. A thermal riflescope is a multi-thousand-dollar precision electro-optical device that will eventually need attention. The internal cell will lose capacity. A drop will damage the front objective. The eye-relief assembly will get full of dust. A firmware update will need installation. Sooner or later — usually sooner than the marketing material implies — the scope will need to come back somewhere for service.

The four major thermal riflescope brands in the Australian market all have different distribution and service arrangements behind them. Here is the honest map.

Pixfra (Pegasus Pro 2 LRF) is distributed in Australia by C.R. Kennedy. C.R. Kennedy was founded in Melbourne in 1934 by Clement Robertson Kennedy — the company is now 92 years old and is Australia’s longest-established and largest specialist importer and distributor of imaging, optics, survey, medical, photographic and surveillance equipment. Head office sits in Melbourne. Branch warehouses and optical service centres operate in Sydney, Brisbane, Adelaide, Perth and Cairns — six capital-city service locations across the country. C.R. Kennedy has been the world’s first and oldest distributor for Pentax for 72 unbroken years. Critically: C.R. Kennedy’s relationship with Pixfra’s parent Dahua is a long-established, stable parent-company-level distribution arrangement spanning multiple Dahua product verticals — not a consumer-brand-only importer relationship. C.R. Kennedy has worked directly with Pixfra on R&D, contributing Australian field testing and shooter feedback into the global Pixfra product development cycle. World-wide Pixfra users benefit from that Australian engineering collaboration.

Pulsar (Thermion 2 Pro) is distributed in Australia by TSA Outdoors — formerly Tasco Sales (Aust) Pty Ltd, established in 1965 by James Watkins. TSA Outdoors is one of Australia’s leading privately-owned distributors of small arms, optics and outdoor equipment, and holds an exclusive Australian distribution agreement with Yukon Group for the Pulsar brand. TSA’s national footprint is dealer-led rather than service-centre-led.

Nocpix is distributed in Australia by Ground Force Australia (GFA), a specialist Australian importer-distributor of tactical and hunting optics.

HikMicro is distributed in Australia by Huntsman Optics — a New Zealand-headquartered company that holds the exclusive Australia and New Zealand distribution agreement for HikMicro outdoor sporting products. Note that this is a consumer-sporting-brand-only distribution relationship: Huntsman Optics distributes HikMicro outdoor products but is not the Hikvision parent-company distributor in Australia. The relationship sits at a different depth from the C.R. Kennedy/Dahua arrangement.

The depth and stability of these distributor relationships varies meaningfully. C.R. Kennedy’s arrangement with Dahua is the most established, the most deeply integrated, and the only one in the Australian thermal market that includes a documented two-way Australian R&D collaboration with the parent manufacturer. The other arrangements are consumer-brand-only importer relationships handling the sporting thermal product, without broader engineering collaboration into the parent group.

For Australian warranty service: a Pegasus Pro 2 LRF that needs attention goes to a C.R. Kennedy optical service centre in Australia. It does not get shipped back to China, or to Lithuania, or to anywhere else. It is assessed, repaired and returned by qualified Australian technicians on Australian time. That is what 92 years of national distribution infrastructure looks like, and it is genuinely uncommon in the Australian thermal market.

The other brands’ warranty pathways depend on whichever importer holds the distribution agreement at the time the issue arises. Importers come and go. Agreements change. The importer who sold you the scope in 2024 may have a different agreement, a different service capability, or different ownership by 2027. The marketing material rarely mentions any of this, but it is the practical reality of buying a major thermal optic in Australia, and it is exactly why the distributor behind the brand matters at least as much as the spec sheet on the box.

The Firmware Question: What Happens Three Years From Now?

A modern thermal riflescope is, in engineering terms, more like a smartphone than a traditional optic. The sensor and the optical chain are fixed at manufacture, but the image processing, the picture controls, the rangefinder ballistic computation, the recording, the menus, the colour palettes, the connectivity, the integration with companion apps — almost everything else that determines the day-to-day user experience — is software. And software that does not get updated is software that ages out fast.

This is where the manufacturer behind the brand begins to matter all over again. Pixfra ships regular over-the-air firmware updates for the Pegasus Pro 2 LRF and the wider Pixfra range. Image processing improves measurably from release to release. New ballistic calculation profiles are added. App connectivity gets refined. The colour palette options expand. The user experience three years into ownership of a Pegasus Pro 2 LRF is meaningfully better than the user experience on day one — not because the hardware has changed, but because the software the hardware runs is on an active development cycle backed by an industrial-scale R&D operation.

That is the Dahua difference, made practical. A USD $4 billion industrial group has the engineering bench to maintain ongoing firmware development across a long product life cycle. A specialist Lithuanian optics maker, regardless of how good their image processing is on day one, has a fundamentally smaller R&D operation supporting that product over time. Both will ship updates; one will ship a lot more of them.

For an Australian hunter spending several thousand dollars on a thermal scope that they intend to own for the next decade, this is real money. A scope that gets meaningfully better in software over five years of firmware development is a scope that retains its value — both in the cabinet and on the resale market — in a way that a scope that stays software-frozen does not.

How Does The Pegasus Pro 2 LRF Compare On Every Metric That Matters?

Pulling all of this together. Here is the honest comparison across the four metrics that genuinely determine how a thermal scope earns its keep over a decade of Australian hunting.

Specifications and Australian pricing are indicative as at June 2026 and reflect manufacturer-published sensor-level figures across the four major thermal riflescope ranges in the Australian market. Confirm current detail with the relevant seller.

NETD vs sNETD Verdict: Which Thermal Riflescope Should You Buy?

If you have followed the argument this far, the answer should already be obvious. There are four serious thermal riflescope ranges in the Australian market in 2026, and across the four metrics that genuinely determine ownership over a decade of hunting — raw sensor sensitivity, sensor manufacturer engineering weight, Australian distributor capability, and ongoing firmware support — the Pixfra Pegasus Pro 2 LRF leads every column.

It runs the finest sensor NETD in its price class. It is built by the world’s #2 thermal manufacturer, with an R&D budget that dwarfs the European specialist optics scale by an order of magnitude. It ships with regular firmware updates that meaningfully improve the device over the years you own it. It is distributed and serviced in Australia by C.R. Kennedy — the country’s most established imaging distributor, with six capital-city optical service centres staffed by qualified technicians, and ninety-two years of operational track record behind the warranty.

And it does all of this for somewhere between $600 and $2,000 less than the equivalent Stellar, $1,100 less than the equivalent Nocpix Ace, and $1,100 to $2,900 less than the equivalent Pulsar Thermion 2 Pro.

The argument that the NETD vs sNETD distinction changes the picture has now been examined carefully on its merits. It does not. sNETD is a marketing specification invented by one manufacturer to close a gap on the universal industry measurement. The hardware sensor floor remains what it has always been — the fundamental physical capability of the system. And on the hardware sensor floor, the Pegasus Pro 2 LRF is the best optic in its competitive set in the Australian market, by a clear margin, at the best price.

Frequently Asked Questions

Want the head-to-head comparisons against each major competitor? Read our companion guides — Pixfra Pegasus Pro 2 LRF vs Pulsar Thermion 2, vs HikMicro Stellar and vs Nocpix Ace — or call the Gun Bar team on 1800 GUNBAR for honest advice from real hunters who have used the gear, not a call centre.