Hour Glass
Product Code : SCL-CL-11531
Hour Glass (SKU SCL-CL-11531) is a laboratory watch glass: a shallow, round glass dish offered in 45 mm, 60 mm and 70 mm diameters. It can be used to cover beakers, evaporate small volumes of solution, grow crystals and hold solids for weighing. The three sizes are supplied, not manufactured, by Science Lab Supplies, which quotes them from Ambala, India, for schools, colleges, training institutes, tender contractors and distributors.
Specifications
The watch glass sizes and finish are tabulated row by row below. In short, each piece is a glass disc with a glazed, smooth finish that gives clear vision of the contents and wipes clean easily, made for durability, and the three diameters let it be matched to the beaker or funnel it covers.
| Specification | Value |
|---|---|
| SKU | SCL-CL-11531 |
| Item | Glass watch glass |
| Material | Glass |
| Diameter options | 45 mm, 60 mm and 70 mm |
| Finish | Glazed |
| Surface | Smooth |
| Clarity | Clear vision of contents |
| Build | Durable |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Hour Glass (Watch Glass)
Despite its name, this item is a watch glass, not a sand timer. It covers a beaker to keep out dust and reduce splashing, lets a few drops of solution evaporate to leave crystals, and holds a solid while it is weighed or examined in school, college and technician-level practical work.
- Class 6–9 science: evaporating salt solution to recover crystals when separating mixtures.
- Class 11–12 chemistry: weighing solids for solution preparation and covering a Chemical Glasses (Beaker) 100ml during heating.
- B.Sc. chemistry: drying small crystal samples and observing crystal shapes.
- Laboratory technician training: correct use of small glassware for weighing and evaporation.
Standard Scope of Supply
The item is supplied as a glass watch glass in the diameter you choose from 45, 60 or 70 mm; state the diameters and the number of pieces for each on your enquiry and they will appear line by line on the quotation. No other accessories are included.
Packing, MOQ and Lead Time
Quotations cover anything from a few watch glasses to a mixed-size set for every bench. For the diameters and quantities you list, Science Lab Supplies gives the packing, delivery time and price, and beakers, crystallizers or other school chemistry lab equipment in India can be added to the same quotation.
As a registered exporter with an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Ethiopia, Tanzania, Uganda, the UAE, Saudi Arabia and Oman. List the diameters and counts you want on the contact page or in the enquiry cart, and refer to the lab tender page when the order is part of a tender.
Frequently Asked Questions
Is this product a sand timer?
No. Despite the name Hour Glass, this item is a glass watch glass for the chemistry laboratory, a shallow dish offered in 45, 60 or 70 mm diameter.
Which diameter should I order?
Choose a diameter slightly larger than the mouth of the beaker you want to cover. A mix of 45, 60 and 70 mm glasses can cover evaporation, weighing and covering tasks on one bench.
Does Science Lab Supplies supply watch glasses in bulk?
Yes. Bulk or single-piece orders in each size are priced by the Ambala, India, team of Science Lab Supplies, which supplies these glasses to schools, colleges and contractors without claiming to make them.
Can a watch glass be heated?
It is used for gentle evaporation and for covering warm beakers. Avoid direct strong flame and sudden temperature changes, and move hot glass with tongs such as the Crucible Tongs.
Related Evaporation and Weighing Ware
Watch glasses work alongside other shallow dishes and weighing vessels in separation, crystallisation and weighing practicals. The items below cover a 12-piece watch glass pack, crystallising dishes, Petri dishes, a porcelain capsule, weighing bottles and a desiccator for dried samples.
- Watch Glass — pack of 12 shallow, circular dishes for covering beakers and controlled evaporation.
- Crystallizers — glass dish of 180 mm diameter and 90 mm height, with grip.
- Crystallizer — clear glass dish, 90 mm across and 40 mm high.
- Petri Dish (Set) — 100 mm glass dish, 20 mm high, with a cap.
- Porcelain Capsule — white porcelain dish with a 50 ml capacity.
- Weighing Bottles — clear glass bottles with ground glass stoppers in 60x30 and 35x25 sizes.
- Glass Desiccator — enclosed glass chamber for cooling dried samples in low humidity.
Browse the full Chemistry Lab range, the Lab Glassware range, or all school lab equipment.
Last updated: 9 October 2026
500ml.jpg)
