Borosilicate glass since 1921

Glass we make ourselves, in Japan.

HARIO Science operates the only plant in Japan producing H‑32 borosilicate glass (thermal expansion α = 32 × 10⁻⁷/K) at volume. We supply laboratory glassware, glass fiber filter tape for ambient air monitoring, and custom glass forming and joining for OEM customers — from the material up.

Glass fiber filter tape OEM & custom inquiries

HARIO SCI. laboratory glassware in H-32 borosilicate glass: beakers, flat-bottom flask and Erlenmeyer flasks

What we supply

Two things we are known for

One is a consumable that keeps air monitoring networks running. The other is the glass itself — tubing, labware and custom forms drawn from our own material.

Consumable

Glass fiber filter tape roll

For beta‑attenuation particulate monitors (BAM‑1020, E‑BAM and similar). 60-day and 90-day rolls, standard and high‑strength grades, 30 mm wide on a 40.5 mm core. Made in Japan.

See the four codes →

HARIO SCI. borosilicate laboratory beakers in graduated sizes

Borosilicate glass

Laboratory glassware & tubing

Beakers, flasks, screw‑cap bottles and separatory funnels in H‑32 borosilicate glass — 18 product families, 147 variants. Tubing is also supplied as raw material for further processing.

See the range →

Why HARIO Science

We start one step further back than most suppliers

1921Glassmaking began. Borosilicate glass has been our only material since.

α=32H-32 borosilicate, ×10⁻⁷/K — melted at our own plant in Japan.

147Laboratory glassware variants across 18 product families.

4Filter tape codes covering both cycles and both strength grades.

OWN MATERIAL: We melt and draw our own H‑32 borosilicate tubing. Composition, dimensional consistency and supply continuity are controlled in-house rather than bought in — which is what makes long-running OEM programs practical.
FORMING: Tube joining, sealing, drawing and forming for custom vessels. If you have a drawing, or only a functional requirement, we can work from either.
SUPPLY: Repeat, scheduled supply for consumables and OEM parts. We already ship to customers in Asia and can issue English inspection certificates, SDS and shipping documents.

Aerial view of the Koga Plant, where melting and forming happen on one site — Koga Plant, Ibaraki — melting, forming, annealing, fabrication, printing and firing on one site. About the plant →

Tell us what you need to source

Whether it is filter tape for a monitoring network, laboratory glassware, or a custom glass part you cannot get made reliably — send us the specification and we will come back with a straight answer on feasibility, volume and lead time.

HARIO SCIENCE CO., LTD.
9-3 Nihonbashi-Tomizawacho, Chuo-ku, Tokyo 103-0006, Japan
TEL +81-3-5614-2101 / FAX +81-3-5614-2122