UVC Light Meter for 254nm Lamp, 220-280 nm

The media could not be loaded. I have a simple review, ive tested several UVC Wands and found one to be a fake and the 2 others to work!This is a real tester, not like those UVC Cards for $8bucks...see my videos as I did a live test

The device quite literally broke before I could try it out.I put the batteries in, turn it over to test it out, pressed the button and the button fell into the device. I had no way of turning the unit on and off. I tried to dismantle the unit to fix the buttong, but with its shoddy build, I was neither able to get the button back to working condition or get the unit back together.

I have used this to verify some UVC lights that I also purchased online. A Coospider UVC light that I bought registered 3000 on this meter and when blocked by glass the reading dropped to 0. So, the both of them verified each other. The one thing not good about this meter is that the detector is not in a wand so the only way for me to safely measure UVC light was to cut a cardboard box to encase the light and then put the turned on UVC light and box over the detector part of the meter while still allowing me to see the meter reading.

The media could not be loaded. This is a quick review as I am doing more extensive testing, but I wanted to say that this inexpensive light meter does work.....and is not a scam as many of us may have thought because of the relatively low price.Like many others during these coronavirus times, I've been looking for things to help protect my family and friends. I was interested in disinfecting with UV-C light, so I purchased two different non-ozone 25W UV-C light bulbs. I had to trust the label and hope the UV-C light was real, but I really had no way of testing except for the banana test which did work. Most industrial UV-C light meters cost $250-800 and are calibrated and certified to be accurate, but I couldn't justify that cost just to test my bulbs. I saw this Santacary UVC Light Meter for 254nm Lamp, 220-280 nm on Amazon with no reviews for only $120, so I decided to give it a try.A few things: it comes with 2 AAA batteries and a soft carrying case. The display shows micro watts per cm squared. There is one button for power. After the button is pushed, it will stay on until you push it again. I mention this because there is another inexpensive UV-C light meter that I will be testing that has a power button that needs to be held down in order to work.When I turned on the meter, there is a 5 second countdown warmup. In a regularly lit room, the meter display went up to 10 and stayed there. I think this is ok, so I treated this as zero. I went outside into the direct sun light (UV-A and UV-B), and the meter to 36. I covered the sensor and the number started falling, so this confirms that the sensor works to detect something. Not sure why the meter detected in direct sunlight, but this must mean that this meter detects some UV spectrum that is in sunlight including UV-C. I also put the meter up to my home LED lights, flashlights, and phone lights....and those didn't register anything on the light meter.I placed this meter in my UV-C disinfecting area about 5 inches away from the bulb similar to how I place keys, phones, wallets, etc for disinfecting. The display meter rose to 1600! With my 2nd UV-C bulb I tried to placed it the same distance, and the meter rose to 1900. This confirmed to me that the meter does detect UV-C and that my bulbs were indeed UV-C.Safety first, so I tested my protective eye gear. I had some inexpensive lab goggles I got for my of my kids' birthday parties. With the UV-C bulb on and with the meter displaying 1500, I placed the goggles between the meter sensor and UV-C light bulb.....and the number immediately started dropping and eventually reached zero. I did the same with my glasses and confirmed that both the cheap safety goggles and my glasses block the UV-C light. I was wearing protective gloves while doing this. This is important because UV-C light is damaging to the eyes and skin.I'm not sure if I trust the numbers, but the manual has the meter accuracy at + or - 4%....but this is ok for my purposes. From my research, UV-C light disinfecting is calculated by amount of energy received over time. In my test where the meter went to 1600, my calculations using 50 mJ/cm squared as the energy goal shows I only need 30 seconds of exposure. If I want to go further to 500 and 1000 mJ/cm squared as the energy goal, I'll need 5.5 and 11 minutes respectively. I usually use the light for at least 15 minutes each time, so in general you'll kill more germs the longer you use the light.I will be conducting further testing and comparing other meters in addition to germ growth tests.

It works great, but I wish that it had a memory function. I had to use my cellphone video camera to monitor the meter while I was out of the room so that I could use it without damaging my skin or blinding me. The reason for the 4 stars instead of 5 was due to the difficulty in monitoring the meter. Hopefully nobody will just stand in front of their uvc light and watch the meter. Uvc is dangerous (for those that don't know).

Didn't work, got a replacement, didn't work, returned for refund. Tested 6 inches away from a 25W 254 nm bulb and it kept reading zero for 2 mins. I know the bulb is emitting UVC because a simple dosimeter card turned bright pink (unexposed card shown next to it). Shame, I didn't want to have to spend 4x more but I have no choice. Maybe you'll have better luck than me.

Didn’t work. Had to return it.

Not sure it is detecting any length of UVC light. I tried to test 3 different, brand new, UVC lights from two different manufacturers and the reading stays at 0.I am going to try 2 other brand new UVC lights to see if I get any reading.I will update this review after my next series of tests.UPDATE: I tested three additional UVC lights, from two different manufacturers, and the reading stays at 0. I changed the batteries from those that were included, same result, a 0 reading. In total, I have tried to test 6 different UVC lights, all within the wavelength range of this detector, and all tests showed a 0 reading. I ran my tests starting with the UVC light off, turned on detector, then turned light on, the detector showed 0 on the display. I then tried my tests with the UVC lights on, then turned on detector next to UVC light, still 0 on the detector display. I left the detector next to the UVC lights for several minutes, still 0 on the display. I am sending this back. This particular detector does not work

seems to work , not sure about it's accuracy +/- 4%, would not read past 2503 um/cm2, apparently that's maxed out. tested on 4 different lamps./bulbs, 2 of the 4 lamps are on the expired list with more than 14000 hrs . contacted tech department and confirmed that. it doesn't read full scale as advertised.. Next lamp change will test output of brand new lamp to get a base line for future reference. Note : even a dead clock is right twice a day.

センサーは、GUVC-S10GDで、ピークは、265nm。254nmにもピークに近い応答があり、殺菌灯用の強度計ではメジャーなセンサーだと思う。Genicom (gen-uv) の UV-C Sensor のページからデータシートをDLできる。電源スイッチが、押すと斜めに倒れるような不安定な感触でこわい。中を確認すると、スイッチの取り付け方が無理やりで、すぐに壊れそうだった。補強して使っているが、それがあるので、あんまり人にすすめる気になれない。米Amazonのレビューに不良品の報告が複数あるが、なんとなくわかる気がする。ただ、自作や簡単な修理が得意な人には、いじりやすい感じがする。ポータブルにしては珍しく、センサーや電池ボックスの配線がSHコネクタで着脱できるので、基盤に手を加えずに、外部電源や別のセンサーを接続することができ、GUVC-S10GDを入手して、プローブを自作することもできる。ケースも、外部接続端子や降圧レギュレーターくらいなら入れる余裕がある。

It seems like quite a few devices in this batch are defective. As some other reviewers have also noted - my device had 0 reading indoors / outdoors / in the presence of 2 different UVC lamps (known to be functional). Reseating batteries had no difference. I would not trust these devices and will be asking for refund, not replacement.

ウシオ電機でエキシマランプcare２２２の測定で220~280の波長との記載があり222nmを実測する為購入しましたが反応がありませんでした。254nm専用との記載があればと思います。