Metrológia teploty

Hart Scientific 9260 - Mini Fixed-Point Furnace (50 °C to 680 °C )

Hart Scientific 9260 - Mini Fixed-Point Furnace (50 °C to 680 °C )

  • Good introduction to fixed-point calibration

  • User friendly and inexpensive

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Dostupnosť: Na objednávku

Hart’s 9260 Mini Fixed-Point Cell Furnace provides a fixed-point system that cuts in half the financial investment required to do fixed-point calibrations and virtually all the time and training required by traditional systems. 

This furnace costs less than half of a large furnace and works with indium, tin, zinc, and aluminum cells to cover all ITS-90 fixed points from 156.5985 °C to 660.323 °C. The cells themselves, using a smaller volume of 99.9999 % pure metal, also cost much less. But cost is only a part of the issue. 

The 9260 makes using fixed points easy. Simply insert the cell at the end of the day and let it sit overnight. The next morning, initialize the built-in software routine for your specific cell. Come back in an hour, verify the stability of the cell, and you can take measurements for the rest of the day from a near-perfect temperature source! 

The built-in software lets you choose between using melting-point curves or freezing-point curves for each metal. The ITS-90 calls for freezing points, but melting points are easier to realize, and the difference in uncertainty (less than 2 mK for most applications) is generally insignificant. In fact, the difference between using traditional cells at their freezing points and Hart’s mini cells at their melting points is not significant for most labs in most applications. 

Comparison blocks are also available for the 9260 for high-precision comparison calibrations at high temperatures. Two blocks are available with a variety of pre-drilled wells in addition to blank or custom blocks. Well depth is 229 mm (9 in). 


Temperature Range 

50 °C to 680 °C 

Ambient Operating Range 

5 °C to 45 °C 


±0.03 °C to 300 °C 

±0.05 °C above 300 °C 

Vertical Gradient 

Top and bottom zones adjustable by offset 

Plateau Duration 

6–10 hours typical 


0.01 ° 

Display Scale 

 °C or  °F, switchable 

Immersion Depth 

229 mm (9 in) 

Stabilization Time 

15 minutes nominal 

Preheat Wells 

Fault Protection 

Sensor burnout and short protection, over-temperature thermal cutout 

Display Accuracy 

±0.2 °C to 300 °C
±0.3 °C to 450 °C
±0.5 °C to 680 °C 

Comparison Block 

Two multi-hole blocks, blanks, and custom blocks available 

Well-to-Well Gradient (in comparison block) 

±0.02 °C 

Heating Time 

1.25 hrs. from 25 °C to 680 °C 

Cooling Time 

10.5 hrs. from 680 °C to 100 °C 


RS-232 included 

Power Requirements 

115 VAC (±10 %), 60 Hz, 11 A, or
230 VAC (±10 %), 50 Hz, 6 A, specify, 1200 W 

Exterior Dimensions

489 x 222 x 260 mm
(19.25 x 8.75 x 10.25 in) 


20.5 kg (45 lb.) with block 

Ordering Information


Mini Fixed-Point Furnace 


Mini Quartz Indium Cell 


Mini Quartz Tin Cell 


Mini Quartz Zinc Cell 


Mini Quartz Aluminum Cell 


Metal Cased Mini Indium Cell 


Metal Cased Mini Tin Cell 


Metal Cased Mini Zinc Cell 

5947Metal Cased Mini Aluminum Cell


Container, Mini-Cell Support, 9260 


Container, SST Mini-Cell Support, 9260 


Accredited Cell Intercomparison 


Comparison Insert, Blank 


Comparison Insert, 7 holes at 6.35 mm (1/4 in) 


Comparison Insert, 2 holes at 3.2 mm (1/8 in), 2 at 4.76 mm (3/16 in), 2 at 6.35 mm (1/4 in), 2 at 9 mm (9/32 in), and 2 at 9.5 mm (3/8 in) 


Call for other comparison insert options. 


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