I have used lasers for many years as part of music events, not an issue at all. However, taking along a 230v show laser is not an option given these are used for moving laser beams and not static beams, so we are moving into the most common item used for projecting a grid, the laser pointer. And with these devices comes a problem, as explained below.
In the UK, the maximum output for a laser pointing device is 1 milliWatt (mW). In the USA it's 5 milliWatt (mW). New laws and regulations came into force recently to combat the idiots that have used them against commercial aircraft, Police helicopters and even football players when taking a penalty. This is typical behaviour of the minority idiot that makes life difficult for the majority that want to use them for legal and scientific purposes. So, the downside is your only not able to buy an over the counter laser pointer in the UK where the output is more than 1 milliWatt (mW).
I strongly advice that once you have your laser kit that you fit your chosen grid pattern onto the laser and leave it on. Your now in the possession of a laser grid pen NOT a pointer. The whole issue with lasers were the pointers as explained above but it's still illegal to have one in your possession. I am unable to find any device that does the job other than the pen type. I advise you transport the laser in it's box or at least in a bag. Cost wise, you can pick up a kit for about £20.00.
There are a number of colours that paranormal groups use and a lot is personal preference. The prime colours used are GREEN RED & PURPLE. I prefer green and nothing stops you trying out all of them. The popular colours are green and red, so I would stick with one or both of those colours.
Most are powered by battery and some come with rechargeable batteries and chargers.
A stand is a very useful tool to have, given you need to project a steady laser grid onto a wall. Cost about £6.00 and does add weight to your argument that your using the laser grid for research in a closed area, a building.
The size of the grid squares are important. Not too small otherwise insects could trigger the change, but not too large so you miss something. Experiment depending on the room size and known activity.
This is dependent on what equipment you have at your disposal. Let us look at the options available, you may well already have them.
We all carry cameras, it's a basic must have. The issue with still photos is it's just one shot, it's better than nothing but a camera really is on the bottom of the list.
This would have to be full spectrum (night vision) given the best evidence is going to be found when the room is in near darkness. It also needs to be steady, so a tripod is a must.
CCTV is being used more and more with investigations. Most come with night vision, so it seems sensible to make use of that.
Mel Meter with Shadow Detection.
The use of the Mel Meter in the UK is not that common, they are expensive at around £250.00 for the one which has Shadow Detection built in. They are part of most American investigations and all the paranormal TV shows use them. The Mel Meter (see page 'NEW THINGS') models with SDD in it's name refers to Shadow Detection. There are no less than 15 different models of the Mel Meter.
This very clever device does a number of important things and was built just for paranormal investigations. Invented by the same guy who brought us the K2 EMF meter, so it's great equipment. The device does the following by default, the model I am referring too is the MEL-8704R - REM SDD
1. Radiated EMF field.
The meter projects a field of EMF which is known to encourage spirit, which in turn they can use to communicate. This meter has four lights which will flash as well as a bleeper (can be turned off). To let you know when a spirit has moved into it's range.
2. Temperature (instant reading).
Once you set the meter with it's base temperature, for example, your room is 14c, any change to that reading will again emit lights and a bleep.
3. Shadow Detection.
Given we are discussing laser grids, the meter will detect any change to the spectrum once you have set it's base line.
So why are these all important?
Let us presume you have your laser grid set up and your movie camera is running. Any change within the laser grid (shadow detection) will be detected by the Mel Meter, so it blinks it's lights. If the entity is moving towards you, the temperature read out of the meter will register that as well, and if it gets close enough the EMF will spike. And if your clever enough, you should have it all recorded on camera. You are there to gather evidence, that is your job. And if the Americans can do it, so can we!.
Up to now it's been mostly good news, here is the negative. There is a limit to how long you can keep a laser grid emitting it's beams. Show lasers have fans to keep the unit cool, pen type lasers do not. If you keep the laser turned on for more than say 10 minutes, your going to fry it - it will burn out. Your going to have to work around this limitation. If you have some of the other devices available like the Mel Meter, that will help you to keep an eye on the activity during laser 'time out'. The suggestion is to run the laser for 10 minutes or less, and leave to cool down for 10 minutes. This gives you 30 minutes in each hour for capture.
If whilst doing your laser 'time out' your Mel or EMF meter or other device triggers, you can then turn the laser grid back on in the hope of capture.
The use of a laser grid does have scientific reason for doing so, on it's own it's a great tool for evidence gathering. If you add that to a device like a Mel Meter, even a K2 EMF meter, then it becomes a powerful tool.
With most investigations you start off slow, the use of a digital temperature gauge and maybe the Echo Vox at the start, you sense something, you then bring in the EVP recorder and the big guns; The laser grid and Mel meter and your recording throughout. This is real investigation and with this level of equipment set up, your chances of gathering real hard evidence has quadrupled.
I have placed six movies below which guides you through the use of the laser grid as well as the useful device the Mel Meter with Shadow Detection.