Constant temperature bath for kinematic viscosity testing of petroleum products. Accommodates six round 2" (51mm) dia. viscometer holders. Bath temperature stabilizes within ¬± 0.5°C (¬± 1°F) of setting, and final adjustment to within ¬± 0.01°C (¬± 0.02°F) can be made. Test temperatures of up to 150°C (302°F) can be selected. Temperature limit control permits the operator to select an overtemperature cutoff point to protect against accidental overheating. Control unit includes immersion heater, circulating stirrer and temperature probe. Composition top plate rests on a 12x12" (30.5x30.5cm) or 12x18" (30.5x46cm) Pyrex™ jar. Optional Cooling Coil Assembly (P4421-4) permits circulation of water or refrigerated coolant for operation at near ambient temperatures. Installs in top plate Order capillary viscometers, viscometer holders and thermometer separately. Included Accessories: Port Covers, stainless steel (6). Conforms to the specifications of: ASTM D445, D6074, D6158; IP 71; ISO 3104; DIN 51550; FTM 791-305; NF T 60-100. Shipping weight: 45 Lbs.