Length Comparator Manufacturer,Supplier and Exporter in India
Product Code : EL-M-8896
Jlab Export is a leading Length Comparator Manufacturer,and suppliers in India
Length Comparator (code EL-M-8896) is a bench measuring frame whose dial gauge, reading to 0.002 mm, records small changes in the length of concrete and mortar bar specimens between reference balls cemented into their ends. It serves drying shrinkage, autoclave expansion and alkali–aggregate reactivity work. JLab manufactures the comparator in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Frame | Channelled or round base with two vertical pillars |
| Top | Adjustable cross plate |
| Dial gauge | Reading to 0.002 mm, 5 mm range |
| Gauge contact | Locates on a 6.5 mm dia. ball or other reference point cemented in the specimen |
| Base seating | Recessed seat for a second ball or reference point |
| Standardization bar | Stainless steel, insulated grip, 6.5 mm dia. balls on the ends |
| Quality check | Each comparator is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 5 units |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-M-8896 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Length Comparator Used For?
Concrete laboratories and engineering colleges use it to follow drying shrinkage of concrete, autoclave expansion of Portland cement and the potential expansive reactivity of cement–aggregate combinations in mortar bars during storage. Each bar sits between the dial-gauge contact and the recessed seat in the base, and readings are compared with the standardization bar. Handle that bar by its insulated grip so hand warmth does not change its length.
Frequently Asked Questions
How fine are the readings on the Length Comparator?
The dial gauge reads to 0.002 mm over a 5 mm range, enough to track small shrinkage or expansion between test ages.
What is the standardization bar for?
It is a stainless steel reference bar with 6.5 mm dia. balls on its ends and an insulated grip; its reading gives the datum against which every specimen length is compared.
Can it be supplied with an electronic dial gauge?
Yes. An electronic dial gauge can be fitted as an optional extra in place of the standard gauge, provided it is requested when the order is placed.
Who manufactures the Length Comparator?
JLab, the brand of Jain Laboratory Instruments Pvt Ltd, manufactures it in Ambala, Haryana, and ships it direct to laboratories, dealers and importers.
OEM Manufacturer
The comparator is designed and assembled by Jain Laboratory Instruments Pvt Ltd, which trades as JLab and was incorporated in 2017 at Hargolal Road, Ambala, Haryana. Buying straight from the maker means the frame, the standardization bar and the optional electronic gauge are quoted together by one factory. JLab exports worldwide, including to Belize in Central America and the Caribbean, Paraguay in South America, Ethiopia in East Africa and Sri Lanka in South Asia.
Related Cement Testing Apparatus
- Test Bar Moulds — cast bars with contact points for reading on the comparator.
- Shrinkage Bar Mould — casts alkali-reactivity bars with stainless steel reference pins.
- Laboratory Cement Autoclave — autoclave treatment of bars before expansion readings.
- Digital Dial Gauges — electronic gauges for other precise length readings.
Find further cement and concrete test items in Materials, part of Chemistry Lab Equipment.
Request a Quote
Use Add To Cart, or send the quantity, your choice of standard or electronic dial gauge and the delivery city through the contact page.
Last updated: 25 October 2026
