SKU: 68328028305

NASA Battery Monitor Clipper BM1 12VDC

$89.06 $98.95
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Description

NASA Battery Monitor Clipper BM1 12VDCSupply voltage: BM 1 12V8 16 Volts DC Supply current1. 5 milliamps Battery capacities5 600 AMP Hour Load current100 AMPS Maximum Charge current100 AMPS Maximum Shunt Standard50 millivolt @ 100 AMP How does it work? The minimum information required to monitor the state of charge of a battery is the terminal voltage and the charge discharge current **. The BM1+ measures both these parameters and computes the state of charge using a complex well proven

  • Supply voltage:BM-1 12V8 - 16 Volts DC
  • Supply current1.5 milliamps
  • Battery capacities5 - 600 AMP Hour
  • Load current100 AMPS Maximum
  • Charge current100 AMPS Maximum
  • Shunt Standard50 millivolt @ 100 AMP

How does it work? The minimum information required to monitor the state of charge of a battery is the terminal voltage and the charge/discharge current **. The BM1+ measures both these parameters and computes the state of charge using a complex well proven algorithm. A simple and intuitive display shows the service battery voltage charge/discharge current state of charge and time to charge/discharge. The instrument also warns the user when the charge level is too low so that load can be shed or charging commenced to protect the battery. A resettable Amp Hour counter is provided for checking the efficiency of the charging system or keeping a track of power consumption and a second input lets the user monitor the voltage of the starter batter.

The simple display format does not mean the internal software is unsophisticated. In fact two separate algorithms are used. One based on integrating amp hours over the charge and discharge cycle the second based on an adaptive internal mathematical battery model.

A unique feature of the BM1+ is its ability to use information from both algorithms during the charge/discharge cycles to continually update its performance. This means that unlike many other systems that rely solely on amp hour integration the NASA BM1+ never needs to be re-synchronised with the battery. The algorithm includes Peukert's equation to ensure accuracy over a wide range of load currents.

The BM1+ does all this whist consuming a meagre one and a half milliamps. It is a true battery monitor easy to install and excellent value for money.

** Some say that they can calculate the state of charge from the terminal voltage only but as we all know the terminal voltage falls when the battery is under load and rises when under charge. This fall and rise can be quite substantial especially when a heavy current is flowing so how can the terminal voltage be used to calculate anything without knowledge of the magnitude of the current involved?.

In The Box

Display; 100 AMP shunt link to M8 Ring terminal; 5 m cable.

Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 68328028305

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4.3 ★★★★★
Based on 29 reviews
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Verified Purchase
Dwayne G
Belleville, US
★★★★★ 5
Great Buy
Size: 11.8FT for 55''-65'' TV
Great product , I was not too sure reading some of the reviews but luckily I didn’t have to calibrate mines it was working just right out the box, but it was easier installing than I thought . Just take your time and should be a breeze and well worth it , works way better than I had hoped , lights are extremely bright
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 30, 2026
U
Verified Purchase
Unkle Cleo
San Leandro, US
★★★★★ 5
Rather pricey.
Excellent vacuum, but I couldn’t justify the price knowing I have another Miele vacuum that works just as well as this one. My current Miele is 27 years old, works perfectly with all attachments, and only cost $20 several years ago. Hard to spend $500 for what I already own. However, if my current one fails, this will be its replacement.
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Reviewed in the United States on April 17, 2026
M
Verified Purchase
M. P. Holmes
Phoenix, US
★★★★★ 4
Close to perfect
This model is among Miele's most recent ones, and benefits from a few small but significant improvements on that account. I'd say that all but one of the components are both beautifully made and beautifully conceived. The floor head initially strikes me as problematic, and for exactly the reason that's suggested by a great many customer reviews of Miele floor heads, which is that when attempting to vacuum even low pile carpet there is a dramatic tendency for the head to essentially glue itself to the carpet. The vacuum power needed to be set on the second lowest of four settings to be able to slide the head over the carpet at all, with either of the two settings of the floor head (carpet or bare floor). So it seems to me that Miele still hasn't figured out how to make a single, multi-purpose floor head, or at least one that isn't electrically powered with a motor in the head to rotate a brush. They do also have air-turbine powered head brushes and models with no rotating brush like the one that comes with the Guard M1. Many types in all. The noise level of this model is even lower than I had hoped and this is one feature that has been further improved - excellent. Also, note that you can replace the default exhaust filter with a separately purchased HEPA filter if that's what you want: 99.999% filtration of the bag plus the HEPA exhaust filter rather than 99.99% filtration of the bag plus the standard, thin, provided, cheaper exhaust filter. This could be important for either allergy issues or safety vacuuming where rodents have made a mess, which can be quite dangerous. Best to lightly spray with dilute chlorine bleach first. There are four exhaust filter grades to choose from. The most basic is the supplied one. Miele desperately needs to improve their documentation to help customers figure out all the variables in their very complex system of models and features. I like this machine a lot. I just need to figure out a better way to vacuum flat surfaces (floors) which are both bare and carpeted. We have almost no high pile or shag rugs (one), so I figured this basic head would be a good choice but I'm concerned that I might never choose to use it on our carpets. Not sure yet. Otherwise close to perfection. One other thing: it's too easy to attempt to insert the bag backwards and not realize it! Oh, one other thing - The cover door for the motor protection filter was stuck closed. It's supposed to snap open when pulling on the handle with modest force but a strong pull didn't to do the trick. There's a slight defect in the mold of one of the two parts where the latch functions. I eventually got it open and used a jeweler's file to very slightly take the edge off the stationary part and now it's fine, but a person could break the cover door trying to overpower the latch. This is a factory defect that's tiny but with potentially very large consequences.
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Reviewed in the United States on March 19, 2026
S
Verified Purchase
S. McCarty
Natrona Heights, US
★★★★★ 5
Excellent fit and value - recommended buy
Size: 3+12+12+2+1 pack
I rarely write reviews, but I'm so impressed by the fit and quality of this set that I made an exception. I'd been running my eufy 11S without brushes, and have been cleaning and reusing the filters for a while now and finally decided to buy replacements. The kit came packed well with everything in order and no damage. I replaced all of the worn parts and installed the brushes and did a test run - everything worked great. I expected some fitment issues because I've seen that with other kits, but I had no issues. The fact that you get multiples of almost everything is icing on the cake. Oh, and I wasn't paid or given anything in exchange for this review, as much as that's worth now, haha. I can recommend getting this kit for your robot vacuum, if it's the right set for your model.
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Reviewed in the United States on February 6, 2025
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Verified Purchase
LGN
Charlottesville, US
★★★★★ 5
Good option for an aftermarket replacement solution.
Size: 3+12+12+2+1 pack
I've been very happy with this product. I think it is a good price point for what is included. Everything was a directly compatible and everything fit as you would expect. The filter quality is good and since there are plenty in the kit I find I change the filters more often which is probably a good thing. I recommed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 3, 2025

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