Tender For supply of installation of portable digital refractometer for ethylene glycol range 0 to 100 percent volume, freezing point 0 to 50 c or 32 to 50 f. model: h196831 of hanna instruments or similar. all specification should be as per attached budgetary quotation catalogue. warranty: 24 months. note: related gem released contract attached for gem reference. note: the firms with past performance of the tendered/same items subject to submission of proof of documents such as pos/r note are only eligible. [ warranty period: 30 months after the date of delivery ]