Replacement for nichrome coil...

[Quit4myKids]

Funds have been transferred to China, and they are attaching the electrodes today. I should have a photo of the actual product tomorrow, and they should be in the mail by Friday from China. As soon as I get confirmation of shipment from China, I'll start PMing folks.

Thanks, everyone for your patience. I wish we could have had more samples, but if we can make them work, I'm sure we can find enough takers for a minimum order.

Q4mK

[SurfVortex]

Thank you, Q4mk!

[jxmiller]

This might be of interest to you guys. I found a discussion on the German forum regarding this.

Radiation might be a problem... I am no expert on IR.

Translation from website. LINK

The following are in thermal IR emitters emitters (in contrast to diode lasers) understood.
The offer by LASER COMPONENTS comprises reflector of manufacturers CAL Sensors and Intex. All the IR emitters are in TO-supplied housing. IR - emitters are here by user often in competition with special very cheap micro-bulbs. Up to a wavelength of about 4.5 microns special lamps often provide a fairly good level of radiation at higher wavelengths is the use of IR emitters mandatory. It may, however, for 2 reasons even below 4.5 microns to make sense to specific IR emitter should be addressed: To have an IR emitter mechanically robust, and, secondly, there are models that allow electric pulses are very good (sometimes up to 100 Hz).

Emitter of CAL-sensor
The emitters of CAL-sensor (CAL-source) are based on metal alloys. These are either a spiral (SA Series) DC version for unpulsed operation or as a metal ribbon (SVF series, design for pulsed operation), one pair of parabolic mirrors as standard. Used will be a robust and widely proven technology, are possible when no further improvements. The maximum temperature is 730 ° C.
SPF Series
The SPF series of CAL has been introduced to achieve higher speed. A modulation level of 50% is achieved in the new design at about 180 Hz. The lamp with the maximum temperature of 1000 K are available in TO-5 package with an integrated reflector and sapphire windows.
SF Series
The SF series was cheaper than blackbody emitters for applications in the NIR and IR developed area. An ultrathin Metallfolienfilament with an emissivity of 0.88 provides a radiation, which comes close to that of a black body.

Emitter by Intex
The IR emitter by Intex are based on the other hand, relatively modern technologies. It is structured around micromechanically hotplates. On a one carbon-silica nanocomposite membrane (amorphous diamond) as a resistance material is deposited, which has a very low temperature coefficient of resistance, and high emissivity. Special advantages: Due to the short thermal Zeitkostante can be reached at 100 Hz modulation frequency is still a modulation depth of 50%. Because of the constant resistance is observed no Einschaltstromimpuls. The radiator is location and dimensionally stable. At the maximum temperature of 750 ° C (10 Hz, 50% duty cycle) a lifespan of 10,000 hours at 600 ° C. for about 25,000 hours. The core competence of Intex is the special carbon coating. The developers certainly still see room for improvement on maximum temperature and lamp life.

[Quit4myKids]

JXMiller, This is interesting stuff, but I'm not at all familiar with the technology. I think it bears additional investigation by someone with some IR experience in a different thread. Have you looked into the technology further? It appears that one of the suppliers listed on the page is a US company.

In any case, it's a good find.

Q4mK

[Quit4myKids]

I have a photo of the final heaters, and they are on their way now from China to California.



I'm not interested in making a profit from these, but I would like to cover my costs. Total cost per heater is $25, plus $3 to cover the padded envelopes and First Class postage to the US. If someone outside the US wants one, I'll charge $2 plus the actual shipping cost. If anyone wanted to contribute a little extra for the time I spent, I wouldn't complain (I'm currently unemployed ), but I'm not asking for anything beyond my actual costs.

I'll start sending out PMs tonight to the first ten people that have previously sent PMs to me or posted interested on this thread, and will continue until I have takers for 9 of them (of course I'm keeping one for myself). I doubt I will reach the end of the list before they are all spoken for, but will post here one way or the other within a few days. One requirement for receiving a heater is the ability to test it, and an agreement to post the results to this thread for everyone to see. I really want to encourage the free exchange of information from all concerned.

Thanks to everyone, and let's keep moving forward.

Q4mK

[Some Guy]

Looks good!
Good job Quit

[Scubabatdan]

Finger on the trigger awaiting my PM
Dan

[SurfVortex]

I hope I am one of the lucky winners!
I completely agree to the terms.
That said, my hat is now being flung into the air!!!!!!!!!!!!!
We all win.

[logandbz]

anxiously awaiting a PM...

[jxmiller]

I am in if you still need someone to test. What the hell.