Hour Glass
Product Code : SCL-BLE-11653
Hour Glass (SKU SCL-BLE-11653) is a 70 mm watch glass: a shallow, curved disc of clear hand-blown glass used to cover beakers, hold small samples and evaporate a few drops of solution. In biology and chemistry practicals it serves as a lid, a dish for weighing small amounts of solid and a surface for observing crystals or specimens. Science Lab Supplies supplies it from Ambala, India, to schools, colleges, tender contractors and distributors.
Specifications
The table holds each detail of this 70 mm watch glass. In short, it is a disc of clear glass, entirely hand-blown, with the curved profile of a watch face, sized at 70 mm across to cover small beakers or hold a sample for evaporation and observation.
| Specification | Value |
|---|---|
| SKU | SCL-BLE-11653 |
| Item | Watch glass (glass watch face) |
| Diameter | 70 mm |
| Material | Clear glass |
| Forming | 100% hand-blown |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Hour Glass
Despite its name, this item is not an hourglass sand timer but a watch glass, named after the curved glass face of a watch. Students use it to cover a beaker, evaporate a few drops of solution to obtain crystals, or hold a leaf, seed or small specimen for examination.
- Class 6–8 science: evaporating salt solution to recover crystals.
- Class 9–10 science: weighing small amounts of solid on the Semi-Analytical Scales with Weighing Stones.
- Biology: holding seeds, leaf pieces or small specimens while students look at them through the Hand Magnifier.
- Covering a beaker of solution while it warms on the Glass-Ceramic Heating Plate.
Let the glass cool before washing it, and avoid sudden temperature changes, which can crack thin glass.
Standard Scope of Supply
Each unit is one 70 mm watch glass made of clear hand-blown glass. Beakers, balances and chemicals are not included; a pack of watch glasses, a beaker set or glass stirring rods can be added to the same quotation if the bench needs them for a practical.
Packing, MOQ and Lead Time
You can ask for a single watch glass or for a quantity that covers a full class practical. The Science Lab Supplies quotation sets out packing, delivery time and price for that quantity, and beakers, Petri dishes or stirring rods can be priced together on it.
Registered with an Importer-Exporter Code, Science Lab Supplies is able to ship to buyers in Qatar, Sri Lanka, Vietnam, Malaysia, Peru and Egypt. Enquiries for the watch glass can be made on the contact page or through the enquiry cart; procurement teams handling bids will find the process on the lab tender page.
Frequently Asked Questions
Is the Hour Glass a sand timer?
No. The name is a translation slip; the product is a 70 mm watch glass of clear hand-blown glass, shaped like the face of a watch and used as a cover, evaporating dish or sample holder.
What size is the watch glass?
It measures 70 mm in diameter, which suits covering small beakers, holding a few grams of solid for weighing, or evaporating small volumes of solution in school practicals.
Is a pack of watch glasses available?
Yes. The Watch Glass in the related list is a pack of 12 shallow circular dishes for covering beakers, holding samples and controlled evaporation, for labs that need several pieces at once.
Who supplies the Hour Glass?
Science Lab Supplies acts as the supplier, sending the watch glass from Ambala, India. Schools, colleges, tender contractors and distributors can order directly and add other glassware to the same quotation.
Related Watch Glasses, Dishes and Glassware
These dishes, beakers, rods and funnels from the Lab Glassware, Chemistry Lab, Clinical Laboratory and Biology Lab Equipment ranges work with a watch glass in evaporation, weighing and sample-handling practicals, and they can all go on one glassware quotation for a school laboratory.
- Watch Glass — pack of 12 shallow, concave glass dishes.
- Petri Dish (Set) — glass Petri dish 100 mm across and 20 mm high, with a cap.
- Petri Dish Glass With Lid — colourless glass dish of about 90 mm with a lid.
- Beakers with Different Pupils — four low-form chemical glass beakers, chemical and heat resistant.
- Glass Stirrer — heat-resistant glass rod of 350 mm, 8 mm in diameter.
- Glass Stirring Rod — clear glass rod, 20 cm long and 4 mm in diameter.
- Funnels — glass funnel 75 mm in diameter, with a short tail.
Browse the full Biology Lab Equipment range, the Lab Glassware range for dishes and vessels, or all school lab equipment.
Last updated: 9 October 2026
