Benedict Roth Recording Spirometer Manufacturer,Supplier and Exporter in India
Product Code : EL-BRRS-2393
Jlab Export is a leading Benedict Roth Recording Spirometer Manufacturer,and suppliers in India
Oxygen use at rest, the basis of a basal metabolic rate (BMR) practical, is recorded with this Benedict-Roth type spirometer of six litre capacity. It has its own 4-speed electric recording kymograph and a gravity-writing ink pen. Carbon dioxide from the breath is taken up by soda lime in a container screwed into the central chamber.
Specifications
| Capacity | Six litre |
| Recording | 4-speed electric kymograph with gravity-writing ink pen |
| Carbon dioxide absorber | Soda-lime container with screw connections, in the central chamber |
| Valves | Easily accessible |
| Drain cocks | On all tubes and containers |
| Sampling cock | Connects the subject to the spirometer or to atmosphere |
| Minimum order quantity | 1 unit |
| Dispatch time | Usually 7–10 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
BMR and Lung Volume Practicals
In medical physiology, the Benedict-Roth spirometer is the classic apparatus for estimating BMR. The subject rests lying down after an overnight fast, wears a Disposable Nose Clip and breathes from the oxygen-filled bell. As soda lime removes carbon dioxide, the bell sinks by the volume of oxygen used, and the pen draws a sloping line on the drum.
Students measure the slope over a set time to find oxygen use per minute. They convert it to heat output and compare the result with standard tables for age, sex and body surface area. The same apparatus records tidal volume and VC, the most air a person can breathe out after a full breath in. Students can check both against the simpler Spirometer of the same capacity.
Frequently Asked Questions
Why does the trace slope during a BMR recording?
Soda lime takes the exhaled carbon dioxide out of the circuit, so the only lasting change in bell volume is the oxygen the subject uses. Each breath shows as a small wave on a line that slopes steadily, and a steeper slope means more oxygen used per minute.
What does the sampling cock do?
It connects the subject either to room air or to the spirometer. The subject breathes room air through the mouthpiece while settling. At the end of a normal breath out, the cock is turned to the spirometer, so the recording starts from a steady baseline.
When should the soda lime be changed?
Change it once it stops absorbing well. Exhausted soda lime lets carbon dioxide build up, so the subject breathes faster and deeper and the slope flattens. Many grades change colour as they are used up. The screw connections let the container come out without strain on the tubes.
Which of the four kymograph speeds should be used?
Use a slow speed for the BMR run, so several minutes of breathing fit on one sheet and the slope is easy to measure. A faster speed spreads out single breaths, which helps when reading tidal volume and VC.
What conditions does a true BMR reading need?
The subject should be awake but fully at rest, lying down after an overnight fast. The room should be at a comfortable temperature, with no recent exercise or excitement. Students who skip these conditions get a resting rate that reads higher than the basal rate.
How is the spirometer cleaned after a session?
Open the drain cocks to let condensed water out of the tubes and containers, then dry them. Wash and disinfect the mouthpiece, and leave the valves open so the circuit dries before the next class.
Other Respiration and Metabolism Apparatus
For a quote, use Add To Cart or send us a message through the contact page.
Last updated: 6 November 2026