9260 Mini Fixed-Point Cell Furnace - Features and Benefits

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. 

Features

• Good introduction to fixed-point calibration
• User friendly and inexpensive

Specifications

Temperature Range

50°C to 680°C

Ambient Operating Range

5°C to 45°C  

Stability

±0.03°C to 300°C , ±0.05°C above 300°C

Vertical Gradient

Top and bottom zones adjustable by offset

Plateau Duration

6 to 10 hours typical

Resolution

0.01°

Display Scale

°C or °F, switchable

Immersion Depth

229mm

Stabilization Time

15 minutes nominal

Preheat Wells

2

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 hours from 25°C to 680°C

Cooling Time

10.5 hours from 680°C to 100°C

Communication Port

RS-232 included

Power Requirements

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

Exterior Dimensions

489mm (H) x 222mm (W) x 260mm (D)

Weight

20.5kg

Ordering Information

Hart 9260

Mini Fixed-Point Furnace

Accessories

Hart 5914A

Mini Quartz Indium Cell

Hart 5915A

Mini Quartz Tin Cell

Hart 5916A

Mini Quartz Zinc Cell

Hart 5917A

Mini Quartz Aluminum Cell

Hart 5944

Metal Cased Mini Indium Cell

Hart 5945

Metal Cased Mini Tin Cell

Hart 5946

Metal Cased Mini Zinc Cell

Hart 5947

Metal Cased Mini Aluminum Cell

Hart 2940-9260

Container, Mini-Cell Support, for 9260

Hart 2942-9260

Container, SST Mini-Cell Support, for 9260

Hart 1904-X

Accredited Cell Intercomparison

Hart 3160-1

Comparison Insert, Blank

Hart 3160-2

Comparison Insert, 7 holes at 6.35mm

Hart 3160-3
 

Comparison Insert, 2 holes at 3.2mm, 2 holes at 4.76mm, 2 holes at 6.35mm,
2 holes at 9mm, 2 holes at 9.5mm