keithley.com website review

30 files are served with short cache lifetimes, so returning visitors download them again (671 KiB).

About 631 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 2.5 s faster on a phone.

2 files block the first paint until they finish downloading. Deferring or inlining them could save about 1.3 s.

Your mobile performance score is 15 (desktop: 43). Under 50 is Google's “poor” band: many phone visitors leave before the page is usable.

A phone's processor spends 4.1 s on main-thread work while loading, 2.6 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

8 third-party services load with your homepage (Optanon, survicate-cdn.com and Google Tag Manager and others), adding 888 KiB and 789 ms of main-thread time.

About 159 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 600 ms faster on a phone.

16 long tasks block the main thread while loading, the longest for 397 ms. During a long task the page ignores taps.

The page has 1,774 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

Polyfills for old browsers add 87 KiB JavaScript that modern phones do not need. Google estimates it would make the page about 150 ms faster on a phone.

1 image could be 142 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

Desktop scores 43 but mobile only 15. A gap that wide usually means heavy scripts and images that hit phones hardest.

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.

Real Chrome users on phones do not pass Google's Core Web Vitals on this page (28-day field data from the Chrome UX Report (opens in a new tab)). Google uses this in ranking.

For real visitors the layout shifts by 0.41 (75th percentile). Good is under 0.1.

Your largest element takes 14.1 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image “Keithley Instruments”.

The page becomes fully interactive after 20.6 s. Good is under 3.8 s.

Scripts block taps and scrolling for 1.3 s in total while the page loads. Good is under 200 ms.

The first text or image appears after 4.3 s on a phone. Good is under 1.8 s.

Visually, the page fills in at 7.9 s (Speed Index). Good is under 3.4 s.

The layout shifts by 0.419 while loading, so content jumps under the reader's thumb. Good is under 0.1.

Real visitors wait 333 ms for the page to respond to a tap (75th percentile). Good is under 200 ms.

Over the last 25 four-week periods to 2026-10-24, real Chrome visitors' tap response (inp) went from 162 ms to 206 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Real visitors see the first content after 1.9 s (75th percentile). Good is under 1.8 s.

Real visitors wait 1.5 s for your server to start answering (75th percentile). Good is under 800 ms.

Over the last 25 four-week periods to 2026-10-24, real Chrome visitors' largest content (lcp) went from 2.1 s to 2.4 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 2.3 MB in 162 requests on a phone: scripts 1.7 MB (34), images 215 KiB (37) and other files 143 KiB (85). Under 2 MB keeps phones on slow connections fast.

By the Sustainable Web Design model, a visit to your homepage emits about 0.64 g of CO₂e: 77.2 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

5 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.

Landmarks should have a unique role or role/label/title (i.e. accessible name) combination: 1 element on the page fails this check, rated moderate by axe-core.

All page content should be contained by landmarks: 1 element on the page fails this check, rated moderate by axe-core.

5 visible links have no text or label, so screen readers cannot say where they go.

2 form fields have no label, so screen readers announce an empty box and autofill guesses.

No structured data (JSON-LD), so Google can't show rich results such as your logo, ratings or FAQs.

Your meta description is 197 characters; Google truncates after about 160, so the end of your pitch is cut.

7 links have no real href, so search engines can't follow them.

No favicon is declared in the HTML, so browser tabs and Google's mobile results may show a generic icon.

2 links use generic text like “click here” or “learn more”, which tells Google nothing about the page behind them.

No twitter:card tag. X falls back to Open Graph, which is set, so this is minor.

The homepage links to 293 pages on keithley.com and 14 external pages.

There is no Organization (or LocalBusiness) JSON-LD, so search engines and AI assistants have no machine-readable facts about who runs the site: its name, logo, profiles and contact details.

There is no https://www.tek.com/llms.txt, a short Markdown guide to your key pages for AI tools (llmstxt.org). It is optional and few AI tools read it yet, so treat it as a cheap extra.

https://www.tek.com/en/buy/tekstore/quote has no <title>, so Google invents the link text in results.

https://www.tek.com/en/buy/promotions is marked noindex but linked from your homepage. If it is meant to be found, remove the noindex.

https://www.tek.com/en/product-support and https://www.tek.com/en/support/datasheets-manuals-software-downloads all use the title “Datasheets, Manuals, and Software Downloads | Tektronix”. Search engines can't tell which page to show for a search, so each competes with the others.

https://www.tek.com/en/buy/tekstore/quote has no meta description, so Google writes the search snippet from whatever text it finds.

https://www.tek.com/en/product-support and https://www.tek.com/en/support/datasheets-manuals-software-downloads use the same meta description. A description written for each page earns more clicks.

Your homepage links to 1 page by a URL that isn't its canonical one, for example https://www.tek.com/en/product-support, whose canonical is https://www.tek.com/en/support/datasheets-manuals-software-downloads. Linking straight to the canonical URL saves crawlers a detour and keeps ranking signals on one address.

https://www.tek.com/en/buy/tekstore/quote has no <h1> headline, so visitors and search engines get no clear main topic.

We fetched 15 pages linked from your homepage (of 198 found) and read each the way a search engine does.

2 images failed to load on a phone, for example https://id.rlcdn.com/464526.gif.

10 of 25 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

5 errors were logged to the browser console while the page loaded, for example “Failed to load resource: the server responded with a status of 429 ()”.

Large scripts ship without source maps.

Social proof on the homepage: 20 testimonial or review blocks. Pairing it with named testimonials or customer logos makes it far more convincing.

No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

The homepage carries about 563 words of visible text.

The page uses urgency cues (a countdown or limited-time wording).

Before a visitor clicks anything, the page loads FullStory, Google Ads, Google Analytics, Google Tag Manager and LinkedIn Insight and 5 mores (measured from a US location before any click). A consent tool (OneTrust) is installed; check it blocks these until visitors agree where the law requires it.

Opening the homepage sets 34 cookies, 3 of them by other companies (measured from a US location before any click).

Loading the homepage contacts 48 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.