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Lawrie
Starting Member
United Kingdom
7 Posts |
 Posted - 05 Sep 2006 : 14:05:55
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At the risk of putting the cat amongst the pigeons, if we do a trial and prove it works, will you use them?
Getting used to the stimulus, whether it is sound or magnetic fields, is termed habituation by biologists. Testing has to be long enough to see if habituation occurs. In rodents, it appears to occur within a couple of days, which is why our lab trials always continue for at least 10 days with the unit on. The graph we show pest controllers illustrates this off-on-off cycle nicely.
The problem with ultrasonics is, as I see it, threefold: i) the distance that the sound travels is limited and obstructed easily by furniture and walls; ii) at the power levels it is being used, it probably deafens the mice, and this will interfere with their communication, but once deafened, they will continue to frequent the area if there is a food attractant present, and iii) I can find no research to show their working under lab-controlled conditions; Dr Havers has tested some ultrasound units and found them ineffective. You do need to be careful, as there 'may' be a unit out there that has had proper testing and research and works when deployed in a certain way. We have never found it though.
But Boxing Hare, you need to be clear that our units are not ultrasonic ones.
I did read about male mice 'singing' and baby mice calling to their parents with high-pitched squeaks, and it is possible that this communication could be interfered with, but it would need research into the frequencies that the mice are using so that an ultrasonic device could properly drown it out. I do not think the manufacturers in China have bothered with that, but I may be wrong; and without matching the frequency, it would be like us having a conversation while music was playing in the background; our (and rodents') brains are good enough to separate the message from the background noise.
With regard to affecting other species, no-one from over 4 million domestic sales has said anything was affected by the device, and we advise that the electromagnetic field our unit generates affects only rodents, but we don't recommend using the domestic version if there are rodent pets such as gerbils, hamsters, etc. in the house. It may be that the physiology of non-rodents is substantially different, or the fact that other animals keep further away from the walls where the field is present reduce the likely effect.
Anyway, many thanks to Boxing Hare for raising the issue, and I hope my little essay has helped everyone realise that the two effects (ultrasonic and electromagnetic) are complex and different, and that we are confident our patented Green Shield devices work when properly deployed in most cases. If anyone has a potential customer site with perennial rodent problems, please get in touch and we can see if a trial will benefit them.
Lawrie Siteman
Green Shield Ltd
www.greenshield.com
0800 0 811 817 |
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nigel
Senior Member
261 Posts |
Posted - 05 Sep 2006 : 20:38:54
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As to using them? Not personally.
I would still rely on giving the customers the same advice your very own website already gives, if you do not want rats, stop feeding them and make sure your property is well maintained so the little blitters can not get in in the first place. With just those two bits of advice you can sort out the majority of rat problems.
But if proven beyond a shadow of a doubt that they geniunely "do what they say on the tin", I would have no problems reccommending them. |
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Dusty
Senior Member
Australia
335 Posts |
Posted - 05 Sep 2006 : 23:25:22
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For an electro magnetic device to create a magnetic field, it still requires a few turns of wire over a soft iron core to provide an induced voltage.
To be honest, I dont see how a couple of strands of copper wire without the iron core are able to set up a magnetic field, let alone one that rodents are distressed by.
Don't feed them, get Rid of them |
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Gamekeeper
Senior Member
United Kingdom
116 Posts |
Posted - 11 Sep 2006 : 14:35:23
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"Ultrasonic Devices - Do They Work? - A Challenge!". Well chaps, they must do because they are sponsoring this site !!!
Fid Def |
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The Spotlight Kid
Member
66 Posts |
Posted - 11 Sep 2006 : 21:36:15
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| can rats hear ultrasonic ???? |
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MickeyMan
New Member
10 Posts |
Posted - 20 Sep 2006 : 08:33:57
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In my experience the majority of customers interested in these devices are those who merely want to cut costs and not address the real issues in their business, such as effective cleaning, proofing etc.
IMHO it's unlikely that most will address these issues and infestations within their premises will go unchecked. In the long run it's good news for pesties, as they will undoubtedly get a large amount of disgruntled customers coming back cap in hand.
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Edited by - MickeyMan on 20 Sep 2006 08:34:42 |
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Fed Up
Starting Member
United Kingdom
7 Posts |
Posted - 08 Oct 2006 : 12:54:53
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Hello,
Ok, let me tell you that ultrasonic and electromagnetic devices do not work. or at least ,they do not work in my house.
Just found baby mice nest behind one of my skirting board, and less than a meter away, I have a lentex Pest X device plugged in. And as i am typing, I can here gnawing ,still behind the same skirting board.
I have two Lentex PestX, priced �37.50 (incl. Vat, though) plugged in my top floor, they are supposed to cover a 4 bedroom house.
So, do they work ? NOOOOOOOOOOOOOOOOOOOOOOOOO
If the gentleman from Greenshield want to try their electromagnetic devices, which I supposed are the same as Lentex, well, I have the perfect site for that. ten terraced houses, all connected and infested with mice, all 3-4 bedroom, next to a canal , with an abandonned small building site at the back, and a nearly derelict huge building in front, with huge garbage bins too from the council estate on the side.
Up to the challenge to see if all ten house can be mice free just with the electromagnetic devices ??
Why do pests always look cute in cartoons ??? |
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pestguard1
Junior Member
United Kingdom
28 Posts |
Posted - 08 Oct 2006 : 13:14:48
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I seem to remember reading a scientific article report in Pest Control News some time back as to the use of these ultrasonic devices ..and there claims were in-conclusive, and it all depended on the environment they were being used in ....maybe someone has a back copy of the said article ..........or get in touch with Killgerm for one.
I have come across customers who have purchased in excess of 50 ultra sonic mole scarers............and non work for them .........."what a total waste of money they say" ..........I said "why buy so many if they dont work "......."well we might just get one that does work ".............the mind boggles at some folk...........
yet I have customers who sware by them...........so different conditions may work for some people.
Brian |
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vermincontrol
Member
United Kingdom
83 Posts |
Posted - 08 Oct 2006 : 17:12:33
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I have come accross the same regarding moles.
Steve
It Has 2 Be Done Pest Control
www.ithas2bedone.co.uk
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Lawrie
Starting Member
United Kingdom
7 Posts |
Posted - 08 Oct 2006 : 22:20:00
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Responding to 'Fed Up's' comments, I have found that the common misconception by people who have bought so-called electromagnetic devices is that when they don't work, it proves to them that the whole idea of electromagnetic devices to repel rodents is invalid, and all devices won't work. It would be like my saying that if you put poison down in a location, and the infestation is still there on your return, all poisons must be useless. The variables are so great, with the layout of the building, the attractants, the wiring, and the rodent behaviour, even before you get to the point of discussing what the difference is between the various devices. Plus of course, the confusion between ultrasonic and electromagnetic devices. I have said before in this forum that I do not believe that ultrasonics work, and more due to the physics of ultrasound propagation than anything else. In addition, the manufacturers in China are not interested in whether something works, only whether it is a gimmick enough to sell in its thousands. And the distributors in this country and elsewhere are happy to play along. If you try to find a single manufacturer or distributor doing as much research into the effect as we are, I will be extremely surprised. Which means that we have a method of deploying the commercial devices which requires attention to detail, and we give a 30 day trial to ensure that it works. For the domestic units, the profit margin is not enough to allow inspections prior to sale, so we offer a 60 day money back guarantee, in case the wiring is not up to it, or the deployment is not done according to the instructions and the customer isn't happy. But an eminent pest biologist has done the studies and this is the first time that he says he has seen an effect in the lab. And he has done tests on ultrasonic devices in the past without success. You are quite welcome to talk to him, I will give you his details if you contact me offline.
With regard to 'Fed Up's' comment that our units are the same as Lentek, I can tell him positively that our units are completely different; we have several patents on our devices to prevent others copying their function; as for his request to try our units on his difficult location, I invite him to send his contact details to us and we will see if we can arrange something; he can either call on 0800 0 811 817 or email [email protected] and chat through the issue.
But like we say to all our customers, these devices are an additional weapon in the armoury in the war against rodents, not a replacement for them. You still have to have sound pest control principles in place.
Lawrie Siteman
Green Shield Ltd
www.greenshield.com
0800 0 811 817 |
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Dusty
Senior Member
Australia
335 Posts |
Posted - 08 Oct 2006 : 23:58:11
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Hare, first year psychology students can confirm your theory on rats becoming accustomed to the ultrasonics.It does happen, and rats being very adaptable, it happens quickly. If you read the blurb that comes with many of these products and look at the section re pets, it will reassure you that the pet will become used to the sound/frequencey.
Perhaps if the units were designed to randomly alter the output frequency throughout the relevant spectrum, preventing the rats becoming accustomed to the unit, it might have a chance of being as useful as claimed.
Be reassured, you wont be out of a job for a while yet.
Don't feed them, get Rid of them |
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Fed Up
Starting Member
United Kingdom
7 Posts |
Posted - 09 Oct 2006 : 13:05:34
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Hello,
Oh, I was not talking about just the ultrasonic devices. i was talking about the Electro-magnetic & ultrasonic devices which are extremely expensive. Again, I bought two from Lentex, and I thought that Lentex with their PestX and pestx Deluxe (priced sometimes at �57.00 odd pounds) were the state of the art when it comes to rodent repellers, because when you google ''electromagnetic rodent repellers'', they always come top of the search and they know very well how to sell their stuff and they also say that they are the only ones on the market who allow their devices to be tested indenpendantly and the devices work and it is why they offer 45 days no quibble money back guarantee. Therefore, it makes them a popular company.
Unfortunately, if you are like me, and there are millions of others who realise that they do not work, you do not send them back because psychologically, it makes you feel better that they are there. silly, I know, but it is the truth. And even sillier, you go out and buy and extra one, just in case two were not enough.
Oh, yes, and I checked by the way, and PestX are manufactured in China, with their patent pending.
Maybe it does work for some, but now, I believe it is psychological. When your electromagnetic (& ultrasonic) devices are plugged in, you relax and you actually stop looking for sign of rodent activities. Beleive me. And if by chance, you happen to see one passing through your house, you go back to the little leaflet you got with the plug, and read something like this '' you may see one mouse or rat (or whatever pest) but rest assured they will not nest nor stay, as they believe they are in an hostile environment''... well, if they (the mice or rats) thought that they were in an hostile environment, they would not have ventured so far, they are more clever than this.
And why did they then nest in my house ..
Honestly, I do not know about the devices from Greenshield and I thank you Mr Lawrie to accept to see if they will be of some use in my area.
Here is the thread I started when I was looking for advice.
http://www.pestcontrolportal.com/snitz/topic.asp?TOPIC_ID=645
You will see that I am particular about leaving food stuff out and that I mop my kitchen floor if not every night, mostly every night and now, i bleach it too and that we blocked every point of entry. And upstairs, there is no food being allowed, so, why would the mice stay upstairs ?
In the room I have a Lentex Pest X plugged in (the electromagnetic & ultrasonic one) I still find mice droppings. And i have two of these plugged at opposite sides on the first floor. they still come.
Anyway , I am addressing the problem to my Housing Association and dh is going to the Health & Environment office this afternoon.
Mice are cute in fiels, but when I find mice droppings on the bed of my special needs child, believe me I freak out and I become quite sceptical about the ability of the electromagnetic devices.
But again, as I said before, to be fair, they may not just work in my house, for some reason. Because a friend of mine has a tiny weeny studio, I lent her a PestX and the same day, they vanished she said ... I don't know...
But for sure, I will email you my details..
thanks to everyone...
Why do pests always look cute in cartoons ??? |
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Fed Up
Starting Member
United Kingdom
7 Posts |
Posted - 09 Oct 2006 : 13:12:14
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I do apologize,I did not imply that Lentex are the same as Greenshield by the way. Well, ok, I did a bit, but this is because I never knew about Greenshield until i discovered this forum. I only knew about Lentex because you see their name everywhere,in every pest control shop (incidentally, not here). But you are right, because Lentex did not work i assume that none of them will work. I would love to be proved wrong , because either the mice are leaving or it will be me. And I have this big feeling it will be me (no joke, I am dead scared of mice and spiders )
Why do pests always look cute in cartoons ??? |
Edited by - Fed Up on 09 Oct 2006 13:14:31 |
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Ultrasonic Devices - Do They Work? - A Challenge!
