Precision Liquid-in-glass Thermometer

Foshan Prosperous Hardware Industry Co., Ltd. is one of the leading manufacturers and suppliers of precision liquid-in-glass thermometer in China, also supports customized service. Welcome to buy bulk high quality precision liquid-in-glass thermometer made in China here from our factory. If you have any enquiry about pricelist, please feel free to email us.

This precision liquid-in-glass thermometer is a high-accuracy mechanical temperature measuring instrument designed for professional laboratory, industrial quality control, pharmaceutical, food processing and academic research scenarios. It operates based on the thermal expansion and contraction principle of sealed sensing liquid inside borosilicate glass capillary, delivering stable, drift-free readings without power supply, ideal for high-standard experimental temperature recording and calibration verification.

Custom colors available

Delivery time: 30-45 days after advance received.

1.Ultra-precise graduated scaleAdopts permanently fused etched scale with fine fractional graduation (0.1℃/0.2℃ minimum division), scale markings never fade or peel off after long-term use. Single-unit independent calibration ensures measuring error strictly controlled within tolerance, with accuracy traceable to international metrology standards like NIST, ISO 17025.

2. High-strength borosilicate glass bodyHeat-resistant, shock-resistant and chemical inert high borosilicate glass tube resists sudden temperature change cracking, corrosion from acid & alkali lab reagents; white back glass enhances liquid column contrast for clear reading under weak light.

3. Mercury-free eco-friendly sensing liquidFilled with safe dyed organic liquid (blue spirit liquid), fully compliant with RoHS, REACH and global mercury ban regulations, non-toxic, spill-safe and environmentally sustainable.

4. Full immersion & partial immersion optional designCustomizable immersion depth marking, total immersion for ultra-precise lab testing, partial immersion for routine industrial bath monitoring; built-in expansion chamber prevents liquid overexpansion damage under high temperature.

5. Long service life & battery-free operationPure mechanical structure, no electronic component aging, no power failure risk, stable performance under extreme low/high temperature environment, reusable for thousands of temperature cycles.

1. Temperature Range

• Custom upper & lower temperature limits: low temperature (-80℃~0℃), normal temperature (-30℃~100℃), high temperature (100℃~300℃) • Single Celsius scale, single Fahrenheit scale, dual ℃/℉ combined scale

2. Graduation Accuracy

• Optional division: 0.1℃, 0.2℃, 0.5℃, 1℃ for different precision demands • Etched permanent scale printing, customized scale line thickness and background color (white back for clearer reading)

3. Overall Length & Stem Size

• Custom total length: 150mm, 200mm, 300mm, 400mm, 500mm and longer sizes • Custom glass stem diameter, bulb size for faster thermal response

4. Immersion Type

• Full immersion thermometer (for high-precision lab measurement) • Partial immersion thermometer with marked immersion depth line • Custom immersion depth marking as required

1.Standard Production Workshop Equipped with 100,000-level dust-free clean workshop and full-automatic integrated production lines, including glass tube cutting, blowing, inner wall processing, scale etching, thermometric liquid filling, sealing and finished product inspection. Stable daily output supports bulk container orders and seasonal peak demand.

2.Self-owned Mold & R&D Workshop Independent mold development team, rapid customization for thermometer length, temperature range, scale layout and structural parts. Fast sample development with short lead time for OEM & ODM projects.

3.Stable Raw Material Supply Chain Long-term cooperative supply of high borosilicate glass tubes, food-grade eco-friendly organic thermometric liquid and packaging materials. Large raw material inventory avoids delivery delay caused by market supply fluctuation.

4.Strict Multi-stage Quality Control System Every product goes through air tightness test, temperature calibration, scale inspection, anti-shock and high-low temperature cycle test. Each precision thermometer can be individually calibrated with official test certificate. Factory qualified rate keeps above 99.8%.

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