Phone: 253-927-6186

Spherical furnace. Thermocouple Calibration furnace.

Saturn 877 Thermocouple Calibration Sphere. Temperature range 100°C to 1300°C.
The Saturn spherical furnace comprises a number of concentric shells.
The outer shell of spun metal is for containment and support. Inside this is a layer of ceramic fiber.
Within the fiber is a ceramic spherical mantle containing the heater windings.
In the center of the furnace is a solid cast ceramic sphere with 8 or 16 tubes, to be used for the thermocouples requiring calibration.
Model 877 Saturn Spherical calibration furnace is revolutionary from a number of aspects:

Thermocouple Calibration Sphere.

Model  Description 
877  Saturn 877 Thermocouple Calibration Sphere.

It is spherical, and its design ensures a central zone of constant temperature.
Thermocouples are inserted around the circumference of the furnace.
When fully inserted the measuring junctions are within a few millimeters of each other at the center of the sphere. Up to 15 thermocouples can be calibrated simultaneously.
The accuracy is between ±0.25°C and ±0.1°C at 1000°C.

Larger tube diameters will give larger gradients, as will larger numbers of tubes.
The precision of this furnace has previously been achieved only by using heat pipes.
Because of the design the price is only one half to one third that of a bath with comparable accuracy
and much smaller capacity of calibration.
The use of newly developed modern ceramic materials has enabled high accuracy, low mass and
high stability to be obtained.
The Saturn system will not contaminate your thermocouples unlike some furnaces that have metal
equalizing blocks.
Saturn 877 Thermocouple Calibration Sphere.
Temperature Range  100°C to 1300°C 
Number of Calibration Points  8 as standard 16 to special requirements 
Diameter of Sensors  4 x 6mm + 4 x 8mm 
Depth of Immersion  180mm 
Accuracy  ±0.25°C to ±0.1°C at 1000°C
(using comparison techniques.) 
Warm-Up Times*  1 hour to 700°C 3 hours to 1300°C 
Stabilization Time*  1 hour to ±0.25°C 
Communications  Supplied as standard with serial interface.
PC adapter cable, and Cal NotePad 

Supply 3kw, 208-240VAC, 50/60Hz
3kw, 115VAC, 50/60Hz

Dimensions  425 mm Diameter 
Weight  55.12 lbs (25 kg) 
* These times may increase as the windings age or if the supply voltage is low. 
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Hotek Technologies, Inc
tel: 253-927-6186