I have a flame scanner made by UV-eye, just the bulb part. It consists of a UV sensor bulb with a 1K resistor (looks like 1/2 watt) on each leg, and two 600V wires/leads. As far as I can determine, it takes a minimum of 560VDC to make it conduct. I think it's rated at 600V, it's suggested that 600V rated wire be used to connect it. But I don't know the current ratings. UV Eye part number 4-314-1 for the bulb and UV1a is the part number for the scanner assembly. I can't find any other info.
As far as the bulbs operation: It has a rarified gas inside. If enough voltage is applied the bulb "avalanches" (conducts then opens) repeatedly depending on the intensity of the UV it senses. The more flame (UV), the more pulses per second. I found a similar circuit using a different product at the following link, if that helps
https://www.electro-tech-online.com/custompdfs/2006/08/R2868.pdf
If anyone looks at that link and sees the circuit, can you tell me what the two capacitors that parallel the input and output do? The bulb I have doesn't seem to have a cathode/anode designation on it, or any other markings either. It doesn't look polarized to me.
I can supply the the whole safety circuit with 120VAC at 9.5A. I want to use it as a one safety to interupt 120VAC going to an emergency gas shutoff valve that requires 120VAC at 0.12A to remain open. For my application I just need to know if a flame is present or not. I would like to be able to bypass this flame sensor, it's output or the controlling device, during initial startup (the emergency gas shutoff valve must be open, supplied with 120VAC, but no flame would be present till I manually light it, after which I would manually switch the UV scanner into the circuit so it acts as a safety.)
I would also like to put the UV scanner (flame on/off) safety in series with an omni-directional tilt switch of some kind that would open the 120VAC going to the same gas shutoff valve. So, if the flame goes out the gas shuts off, or if the unit tips the gas shuts off.
I am looking for a normally closed omni-directional mercury tilt switch that will handle the current requirements of the emergency gas shut off valve.
So, in a nutshell if I got it right, it looks like I have to step up 120VAC to 1200VAC, rectify and filter to 600VDC, apply this with proper current limiting to the bulb, voltage divide properly, then filter the scanners output pulses and somehow control a devise (relay?) that would interupt 120VAC to the emergency gas shutoff valve.
Oh! and I'm a new forum member so Hi everyone and thanks to all who look and many thanks to any one who might help.
Rezaxis
As far as the bulbs operation: It has a rarified gas inside. If enough voltage is applied the bulb "avalanches" (conducts then opens) repeatedly depending on the intensity of the UV it senses. The more flame (UV), the more pulses per second. I found a similar circuit using a different product at the following link, if that helps
https://www.electro-tech-online.com/custompdfs/2006/08/R2868.pdf
If anyone looks at that link and sees the circuit, can you tell me what the two capacitors that parallel the input and output do? The bulb I have doesn't seem to have a cathode/anode designation on it, or any other markings either. It doesn't look polarized to me.
I can supply the the whole safety circuit with 120VAC at 9.5A. I want to use it as a one safety to interupt 120VAC going to an emergency gas shutoff valve that requires 120VAC at 0.12A to remain open. For my application I just need to know if a flame is present or not. I would like to be able to bypass this flame sensor, it's output or the controlling device, during initial startup (the emergency gas shutoff valve must be open, supplied with 120VAC, but no flame would be present till I manually light it, after which I would manually switch the UV scanner into the circuit so it acts as a safety.)
I would also like to put the UV scanner (flame on/off) safety in series with an omni-directional tilt switch of some kind that would open the 120VAC going to the same gas shutoff valve. So, if the flame goes out the gas shuts off, or if the unit tips the gas shuts off.
I am looking for a normally closed omni-directional mercury tilt switch that will handle the current requirements of the emergency gas shut off valve.
So, in a nutshell if I got it right, it looks like I have to step up 120VAC to 1200VAC, rectify and filter to 600VDC, apply this with proper current limiting to the bulb, voltage divide properly, then filter the scanners output pulses and somehow control a devise (relay?) that would interupt 120VAC to the emergency gas shutoff valve.
Oh! and I'm a new forum member so Hi everyone and thanks to all who look and many thanks to any one who might help.
Rezaxis