Description
MHI MC-GAXP-30 Spiral Microheater 1400C (OD=D2= 1″)—The element’s maximum temperature is 1400C. Users may measure a lower temperature with an adequately rated pyrometer.
Ceramic Base Included with the MC-GAXP-30.
Note: the one and two-inch microheaters do not have a ceramic recess. The picture shown is generic.
Approximately 250 Watts [10V @ 27A (RMS)].
D1 and D2 are normally separated by lip T. However, for the 1″ spiral, this is 0.0″ (there is no lip for this size to retain compactness). H is 2.5″. D1 is the OD.
** Power reported under free radiating/ no-load condition with heater resting on the provided ceramic plate. Horizontal.
Connectors comprise One Set of Appropriately rated connecting screw clips.
Note that limits cannot be exceeded on current, voltage, and element temperature.
Note that the current will be different if the heater is covered (insulated).
For more information, please visit our GAXP Spiral Microheaters page
For controls, choose either
Feedback controls are BPAN-O-PLUS-120T and Transformer.
For customers who do not have a 120V wall supply and purchase the power controller, a 220V to 120V transformer will be added at no extra cost when the BPAN control system is purchased.
or the
Open Controls with no feedback comprise the DC Power Supply and a TC Read. Please also choose the T/C and TC extension wire.
For more information on the BPAN-O-PLUS controller, please click on the Power and Temperature Control Panel Pages.
The Alumina ceramic is rated to 1800C. Leads should be able to carry the current, e.g., 10 AWG wire.
*Packaging & Handling fee shown is for one (1) Spiral Microheater additional heaters will increase pricing.
*The weight will be calculated using the control panel option when checking out.
*The correct weight and shipping price will be shown in the final acknowledgment from MHI.
Note that the maximum temperature is at the center of the spiral region unless asymmetric power delivery is required
In the diagram in the specifications tab D1 and D2 are separated by 0.1″ T is 0.25″ and H is 2.5″. D1 is the OD.
For obtaining maximum temperature MHI controls are highly recommended. Large diameter GAXP® microheaters could develop some springiness from induced magnetic forces. Potting in ceramic paste is allowed as long as care is taken to factor-in the loss of any thermocouple response in the measured temperature. Note element temperature will be higher and maximum element temperature should not be exceeded. In the free radiation mode the power can be maximized.
The objective of the use for free radiating devices is to maximize the radiative POWER transfer from the heating elements. If the heating element is covered with insulation, the objective of the user changes to obtain a certain temperature inside the insulated region. The control of temperature inside a chamber, or power maximization in a free radiating mode can be made with MHI temperature and/or power controllers. When covered the power and current will be lower and the element temperature can be exceeded quickly if not monitored and controlled. For either objective, one cannot exceed the rated temperature or maximum current of the heating element. Power output will be lower in enclosed radiation mode with a temperature control feature as opposed to or in addition to the power control.
In the diagram D1 and D2 are separated by 0.1″ T is 0.25″ and H is 2.5″. D1 is the OD=1″.
There is no hole for a TC per se, however the ceramic is easily bored at a point of your choosing and for your T/C bead diameter. Please note that the only correct way to measure temperature for such a configuration is with an optical pyrometer. One will be able to calibrate the current with the temperature or power output. A current (amps) vs pyrometric measured temperature is provided below – when a TC is placed at any position and the current is monitored – one can then calibrate the TC reading (at the t/c placement location) with the actual pyrometric temperature – within reasonable error. The curve below should be use cautiously (only for general guidance) as it pertains to free radiating conditions only. Note that very often the TC reading that you measure will show a number well below the actual pyrometric temperature. Calibration is required when using t/C.
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Y.X. Canada
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