Hypertension is one of the leading causes of cardiovascular problems. As per the WHO reports, an estimated 17.9 million people died from cardiovascular diseases (CVDs) in 2019, representing 32% of all global deaths. It has been found that over three-quarters of CVD deaths take place in low-and -middle-income countries. One of the primary reasons behind the misdiagnosis of hypertension is inaccurate blood pressure (BP) measurements, caused by the use of uncalibrated devices or instrumentations error. The mercury sphygmomanometer is the gold standard of BP measurement. Unfortunately, mercury is established as a known pollutant and is considered poisonous. Mercury sphygmomanometers are getting phased out globally due to changed government policy regarding the use of mercury in healthcare. Despite this measure, we do not have effective replacement devices on which clinicians would have the same degree of confidence as the good old mercury manometer. The alternatives for mercury manometer are aneroid and the oscillometric type of BP monitors. Both of these technologies suffer from inaccuracies, unreliability and higher maintenance issues. Therefore, we propose a low cost, mercury-free, auscultation based Galinstan sphygmomanometer- Merkfree, for easy and accurate BP measurement. The device components are designed in Solidworks and fabricated by using additive manufacturing (3d printing). Here, the Galinstan is being used as a substitute for mercury, which is a non-toxic alloy of Gallium, indium and tin. The device is showing good accuracy compared to a gold standard mercury sphygmomanometer. The pilot clinical trials were conducted at Dayanand Medical College & Hospital (DMCH) (Ludhiana, India) to compare the performance of the proposed device with a mercury sphygmomanometer and validated oscillometric sphygmomanometers from Microlife. The results showed good agreement for systolic and diastolic BP measurements taken using Merkfree compared to mercury sphygmomanometer and validated oscillometric device. This indicates that the proposed device is a perfect replacement of the Mercury manometer and gives the clinician community the same faith, reliability, and accuracy.