Sivananda electronics, an iso 9001 credited company, is the manufacturer of oil loss angle meter, model: mlo-1d. The oil loss angle meter is designed for tan delta measurement of petroleum jelly using. It gives dielectric constant and tan d directly on digital meter. Power source is continuously variable up to 600 vac which gives a maximum stress voltage of 300v/mm in siva three terminal test cell. The instrument has advantage over the customary bridges, as no tuning is necessary prior to every single reading. This result in higher testing speed and even semiskilled operators can use the equipment easily.