3lmeter.com

https://3lmeter.com· First analyzed 27 May 2026· Updated 27 May 2026

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3lmeter.com

Mobile

Sponsored

Hosting Provider

Tencent Cloud

cloud.tencent.com

IP Address

49.232.165.92

Site Location

🇨🇳 Chinavia ip

Server Location

🇨🇳 Beijing, China

ASN

AS45090

Organization

Tencent cloud computing (Beijing) Co., Ltd.

Server

Microsoft IIS

Nameservers

f1g1ns2.dnspod.net.f1g1ns1.dnspod.net.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.1 s10%

Speed Index

1.5 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

2 MB

22 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Tencent Cloud

Technology Stack

3 Technologies Detected

Libraries

jQueryv1.11.1

Web Servers

Microsoft IISv10.0

Frameworks

ASP.NET

SEO Analysis

F37/100

Meta Tags7/15

Content7/12

Headings0/8

Technical5/21

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

3lmeter.com3lmeter.com

电能计量领域的创新先锋-洛阳高新三L电子产品有限公司

3L表计由北京斯瑞埃尔电子技术有限公司、洛阳高新三L电子产品有限公司组成。自1989年以来专业从事TDM时分割乘法器硬件原理全电子高精度关口电能表、安装式标准电能表、便携式标准电能表等电能计量仪器、仪表的研发制造。3L表计在北京中关村建有国内最早专业的电能计量仪表和数据集抄通讯产品研发中心，采用经典的TDM时分割...

Description truncated.

Title Length26 chars

Recommended: 50-60 chars (~161px / 580px)

Description Length276 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

14 issues found

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Local SEO

Local Search Readiness

2/100

Poor

1 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F24/100

Bot Access

20/25

Machine Read.

1/25

Schema Data

0/25

Citation

3/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:8%

Words:127

Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

AI readiness recommendation preview...

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

58/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

3/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

10/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

22/100

255 mg

CO₂e / view

2.0 MB

Page Weight

50%

Cleaner Than

New Visitor

291 mg

Returning (cached)

146 mg

Annual (10K/mo)

30.6 kg

Emission Segments

Data Center

57 mg

Network

61 mg

Device

137 mg

Resource Breakdown

JavaScript

107.0 KB

Images

1.8 MB

CSS

117.1 KB

HTML

19.0 KB

Green Hosting Not Verified

Tencent Cloud

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

183d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Asseco Data Systems S.A.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

28.10.2025

Valid Until

27.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

3lmeter.comwww.3lmeter.com

SHA-256 Fingerprint

6C:9A:E0:D6:53:06:4D:C5:FE:91:89:BE:D7:C1:8D:25:89:DD:AE:F7...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟣 Private(private)

content-length

19134

content-type

text/html; Charset=utf-8

date

Wed, 27 May 2026 17:16:31 GMT

server

Microsoft-IIS/10.0

x-powered-by

ASP.NET

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

mxbiz2.qq.com

mxbiz1.qq.com

Domain Information

3lmeter.com

Domain Age

15y 12m

Created

02.06.2010

Expires

02.06.2029

Last Updated

08.05.2020

Registrar

DNSPod, Inc.

DNSSEC

Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

23/100

Not Mobile Friendly

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

5 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

微软雅黑

WCAG Partial

50/100

Readability

/30

11/30

13px · LH 1.85

Hierarchy

/20

8/20

WCAG

/25

17/25

4.02:1 min contrast

Performance

/25

14/25

1 font

Heading Font

微软雅黑

Body Font

微软雅黑

Sans13px

Contrast Ratio

4.02:1

10 issues

Reading Comfort

~41 CPL

Narrow lines

13px

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Wide line spacing (1.85). 1.4–1.6 is optimal for body text.

✅ Easy to read: Flesch score 98/100 — accessible to general audiences.

⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 4.0:1).

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 98

Color Palette

12 unique colors

Light

#ffffff

Background· 35.1%

#3dade8

Accent· 11.7%

#0e8d90

Primary· 7.3%

#d6e8ec

Secondary· 7.1%

#3177b1

Accent· 5.8%

#51c7f3

Accent· 5.5%

#223b58

Secondary· 4.7%

#72c6e3

Accent· 3.9%

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Scripts & Styles

4 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(3)

Website Identity

3lmeter.com

[email protected]

15 years old

Location detected: 🇨🇳 Chinavia ip

DNSPod, Inc.

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Last analyzed: 27 May 2026 at 17:17

Historical Analysis & Change Tracking