SwingSuspension Apparatus Water Bath
SwingSuspension Apparatus Water Bath (Sanskrit: Dola Yantra) is an instrument used in preparation and pharmaceutical equipment. A pot partially filled with liquid with a horizontal rod placed across the rim, from which a muslin bag containing the material to be processed is suspended (hung like a swing/doll - 'Dola') and heated in the liquid below without direct contact with the bottom.
| Sanskrit name | Dola Yantra |
|---|---|
| Ayurvedic category | Preparation and Pharmaceutical Equipment |
A pot partially filled with liquid with a horizontal rod placed across the rim, from which a muslin bag containing the material to be processed is suspended (hung like a swing/doll - ‘Dola’) and heated in the liquid below without direct contact with the bottom.
Where is it described in the classical texts?
Rasaratna Samuchaya; Rasa Tarangini; Ayurveda Prakasha. Fundamental apparatus in Rasashastra for Shodhana (purification) of metals and minerals.
How is it used traditionally?
Shodhana (purification) of metals, minerals, and toxic substances through indirect heating. The substance in the hanging bag gets heated by the boiling liquid (often Kanji/fermented rice water, buttermilk, or herbal decoctions) below.
Traditional materials
- Earthen pot (Mrit Patra)
- Muslin cloth bag
- Bamboo or metal rod
- Jute string
Modern variants
- Stainless steel water bath with support rod
- Electric heating water baths
- Temperature-controlled Dola Yantra
Regulatory status
- India Cdsco: Not classified as a medical device. Pharmaceutical equipment under AYUSH GMP.
- Us Fda: Subject to cGMP requirements for drug manufacturing.
- Eu Mdr: Not classified as a medical device.
Consult a qualified vaidya before acting on anything here. Ayurvedic practice is prescribed to a person, not to a condition: the same dravya is given, withheld or substituted depending on your constitution, your agni, the season and what else you are already taking. A page cannot know any of that. Self-prescribing from a reference is how the wrong preparation, the wrong dose or the wrong anupana gets used.
Educational reference only. Nothing on this page is medical advice, a diagnosis, or a recommendation to take anything. Traditional uses and research findings are reported as published, not as claims about what any product does. If you take prescribed medication, raise any interaction with the prescriber rather than acting on a page. See our editorial standards.