Using a circulating pump, inside / outside circulation, high temperature precision, low up to -35 ℃, freezer, viscometer, and so correct thermostat and kept cold (CE certified). ? Refrigeration system? Set at low temperature freezer automatically stops when the power system? Automatically stops freezer tank internal temperature rises to a certain temperature? Can be ordered in high-temperature high-temperature operation of the refrigeration system (available the following 95 ℃ )? double valve to prevent refrigerant leak? design? 5 variable speed circulating pump, low speed for the inner loop, high speed for the outer loop. Poor pump speed 12,345 maximum pressure (PSl) 0.5 1.1 2.4 4.9 5.9 Maximum flow rate (l / min) 12.8 18.8 5.6 8 28 pumping - - - 5 l / min 10 l / min stainless steel sink metal forming (? In addition to 30L)? Multifunctional stainless steel spring frame good scalability, height adjustable, various containers can be clamped (optional)? test tube rack a variety of specifications, adjustable tilt angle (optional)? supports RS-232 communication? By Dedicated software Lab Tracer set temperature, observe the operating state, save the data communication lines and standard software CD PID microprocessor control function can be set to automatically adjust the temperature value of 0.1 units, digital Custom Logical Safe -????? Control System? Preset start / stop function, time range from 0 to 99 hours 59 minutes can save three common temperature, can always exhale use? overheating protection function? automatic on / off function (continue running when a sudden power recovery after a power failure or stopped Select Function)? temperature sensor sounds an alarm when a short circuit? sounds an alarm and stop? porous shelf to protect important parts heaters, sensors, etc.? Control panel displays the set temperature, actual temperature, operating state of the instrument type RW- low water 0525G RW -1025G RW -2025G RW -3025G temperature range of -25 ℃ ~ 150 ℃ Accuracy at -10 ℃ ± 0.05 ℃ stability at -10 ℃ ± 0.1 ℃ -25 ℃ heating time to 90 minutes (alcohol / ambient temp. 20 ℃) ??Stainless steel pump inlet / outlet Φ12.7 mm cooling capacity at -20 ℃ 80 135 400 540 at 0 ℃ 280 405 560 700 at 20 ℃ 420 585 740 840 freezer 1/3 LBP, R-134a 1/3 LBP, R-134a 1/2 LBP, R-404A 3/4 LBP, R-404A Dimensions (length X width X height) Liner Size (liters) 5,102,030 sink (mm) 150x285x160 211x340x180 290x400x200 300x450x230 pot mouth ( mm) 150x99 211x154 290x214 300x264 external (mm) 302x438x690 360x490x780 380x560x825 440x620x895 weight (net) 37 44 60 67 power supply rated voltage, Hz 220VAC, 50Hz power 7.0A 9.2A 12.8A 13.8A Heater power (W) 1,000 1,500 2,000 2,000 Use environment: temperature 5 ℃ ~ 40 ℃, the maximum relative humidity of 80% to 2,000m height