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Ohaus Guardian 5000 Hot Plate Stirrers provide precisely regulated heating and agitation for liquid samples. Ceramic top plates supply even heat distribution from ambient +5°C to 500°C. The software-controlled magnetic drive system accurately controls mixing speeds between 60 and 1600rpm.
Guardian hot plate stirrers feature SafetyHeat™, an early detection system with two independent sensors continuously monitoring the hot plate. The system analyzes operation and shuts down the heater before an overtemperature condition occurs. A hot top indicator on the display protects workers by indicating when the heating surface temperature exceeds 40°C.
Heater accuracy can be improved at a selected point using single-point calibration. Up to 3 calibration points for the plate and 3 points for the probe can be saved.
The bright and easy-to-read LCD display shows large temperature and stirring speed settings for monitoring from across the lab and a prominent hot top indicator. The SmartHousing™ enclosure stays cool to the touch, resists chemicals, is easy to clean, and directs spills away from internal components. Other features include an on/off switch to disconnect the heater and a built-in support rod holder. Guardian 5000 stirrers have capacities of 15L or 18L and top plates support up to 14.5 kg (32lbs). Units operate on 120V, 50/60Hz. Models with the ”F” suffix operate on 230V, 50/60Hz.
A temperature probe can be purchased separately to control the sample temperature.
OB-70 models have a 15L stirring capacity and a 7x7in (178x178mm) ceramic heating platform
OB-72 models have an 18L stirring capacity and a 10x10in (254x254mm) ceramic heating platform
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Stir Capacity
OB-70 Models: 15L (4gal)
OB-72 Models: 18L (4.8gal)
Weight Capacity
32lb (14.5kg)
Plate: ±3% >100°C, ±2°C ≤ 100°C
Probe: ±1% >100°C, ±1°C ≤ 100°C
OB-70: 120V/50/60Hz, 10.0A, 1080W
OB-70F: 230V/50/60Hz, 6.0A, 1242W
OB-72: 120V/50/60Hz, 11.2A, 1210W
OB-72F: 230V/50/60Hz, 7.0A, 1449W
OB-70 Models: 7 x 7in (178 x 178mm) WxD
OB-72 Models: 10 x 10in (25.4 x 25.4mm) WxD
OB-70 Models: 4.8 x 12.2 x 8.8in (122 x 309 x 223mm) WxDxH
OB-72 Models: 4.6 x 16.3 x 11.25in (12.2 x 41.5 x 28.6mm) WxDxH
OB-70: 7.0lb (3.18kg)
OB-70F: 7.0lb (3.18kg)
OB-72: 12.0lb (5.44kg)
OB-72F: 12.0lb (5.44kg)
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