Excellent and convenient product.
I gave 3 for communication as in middle/neutral, because you must rate to post. I haven't had any communication with them though.
I have a few complains and improvement suggestion .

1. Windows only control panel is a big minus. ( I haven't used Microsoft since the mid 90s.)
2. WiFi should also be a router.
3. Control panel should be web based.

Simon | Feb. 14, 2019

Quark-elec G022G is ideal for boat security.

For G022 GSM 2G SMS Remote control module with case

I accidentally purchased the G022 without GPS in the first instance but Quark-elec were great and swopped the unit for the G022G that I meant to order in the first place. Thanks Joshua. The unit was easy to set up and use with the app and is an ideal way to provide vehicle security with tracking. I have installed it on my boat and it works brilliantly providing all the functionality I require and giving me piece of mind. Thank again Quark-elec this innovative product highly recommended.

Guillaume | Aug. 24, 2018

Parfait.

For A026 Wireless AIS+GPS Receiver

Petit boitier costaud, facile à installer. Il faut prévoir en plus :
-une antenne AIS avec son câble en BNC
-une antenne GPS active avec connecteur SMA
-une alimentation 5V USB si on ne l'utilise qu'en WIFI.
Avec une antenne AIS "Pacific Aerials" de 90 cm sur le balcon arrière de mon voilier et une antenne GPS à 8,99€ il fonctionne parfaitement, et j’espère pour longtemps. Les cargos sont captés à 10 milles nautiques, le CROSS à au moins 30 milles. Fonctionne très facilement avec OpenCPN sous Linux et Android, et avec NV charts sous Android.
La consommation électrique semble faible, conformément à ce qui est annoncé.
Ce produit devrait avoir sa place dans les catalogues des shipchandlers...

John | April 25, 2018

Very satisfied with the QK-A031 which is simple to use.

For A031 NMEA 0183 Multiplexer with SeaTalk Converter

I purchased this multiplexer to simplify the construction of a navigation and performance computer for my 29' Moser M2 sailing boat. When I started the project I used an Arduino to do the data acquisition and performance calculations for display on a 7" TFT screen. Since the serial data acquisition (NMEA-0183) was completely asynchronous, the software soon became rather cumbersome and unreliable. The QK-A031 simplified everything, providing a single stream of NMEA-0183 sentences for parsing and data extraction. The Arduino is still used to perform the parsing, compute the performance parameters, drive the TFT screen and synthesise NMEA sentences to drive NASA Marine gauges. The NASA Marine Steering Compass is driven in a standard way, while the NASA GPS Repeater is used in a nonstandard way to indicate the course to steer for best speed based on wind conditions and the boat polar curves. Overall, I am very happy with the multiplexer which worked straight out of the box.

John | April 25, 2018

Very useful unit which is simple to use.

For QK-G031 GSM Remote Temperature Controller

I purchased the QK-G031 to monitor and control remotely the heating system in my home. I used a spare pay as you go SIM card from the UK (credit on the card does not expire and there is no minimum usage per month). The controller and the three temperature probes (supplied) worked flawlessly, monitoring the primary manifolds of our underfloor water heating. I tried all the SMS commands listed in the user guide but did not get around to testing the Android APP on my phone. I plan to connect the relays to the heating circulation pumps. I may purchase another unit for use on my 29' Moser M2 sailing boat. It would be useful if the unit could accept serial text in one input port for retransmission as an SMS on demand.

John | April 25, 2018

A very useful interface element which is plug and play.

For AS03 NMEA Protocol Bridge

The contruction of a navigation and performance computer for my 29' Moser M2 sailing boat was greatly simplified by using a QK-A031 multiplexer to combine serial data streams into a single stream for further processing. The multiplexer uses balanced I/O and the Arduino SBC uses 5V TTL. The QK-AS03 provides a simple plug and play interface (bidirectional balanced to RS232) which only needs an RS232 to TTL level converter to complete the picture. I would certainly use the inexpensive QK-AS03 again in similar projects.

Jan | March 30, 2018

Good product! Very good price!

For A024 AIS Receiver with multiplexer + WiFi

I bought the QK-A024 to use it on my 24ft sailboat. It was easy to install and works perfect with the water charts App WinGPS Marine on an Android. Fast shipping to the Netherlands. Its a very good product for this price!

Jeroen | March 22, 2018

A fantastic upgrade for my classic sailing boat

For A027 Wireless AIS+GPS Receiver With SeaTalk

I own a classic (1976) sailing boat which I bought with a lot of near vintage, but fully functional, equipment. My autotiller, chart plotter and wind instruments use Seatalk, my speed sensor and GPS receiver NMEA0183. Since I can't get new coastal maps for my chart plotter anymore, I've switched to use a Windows tablet with OpenCPN but was really looking for an affordable way to bring all the Seatalk/NMEA info to my tablet wirelessly. On top of this, I have no AIS receiver but definitely needed one as well. After endless searches I stumbled upon Quark-Elec and the QK-A027 which in one single and very affordable product addresses all of my needs. I applaud Quark-Elec for making these products available - they help reduce reduce waste, unnecessary spending and are absolutely the coolest way to bring new life to classic vessels. On top of this, communication with the team in the UK was great as well.

Winrent | March 17, 2018

ottimo

For A026 Wireless AIS+GPS Receiver

Compatto
Funziona correttamente
Consumi ridotti
Perfetto come AIS "portatile " da imbarcare quando serve; per chi cambia spesso barca ,trasferimenti , noleggio,e regate.
Consumi ridotti , per renderlo totalmente portatile è stato accoppiato con power bank da 20000 ma con durata di 15/20 ore + antenna "gommino"
Da migliorare :
Manca la disponibilità di un sw QK dedicato per Android/Win/Mac , con una interfaccia semplice ,chiara , rapida (tipo AMEC AIS https://play.google.com/store/apps/details?id=com.AMEC.AmecAIS&hl=it)
Manca un interruttore on/off
Saluti

Lafourcade | March 2, 2018

Great AIS and GPS receiver

For A027 Wireless AIS+GPS Receiver With SeaTalk

This AIS+GPS receiver is really powerfull.
After connecting, it has been tested on board with a standard boat GPS antenna and a 3db VHF antenna.
Not connected yet to my SeaTalkNG network.
Configuration is very easy with the tool available on site.
AIS target could be identified up to 15 nm.
Interfaced with OpenCPN and qtVLM using WiFi and USB port on PC and Android pad.
Both of these applications could detect, analyse and display NMEA sentences.
NMEA sentences are compliant with the standards and well interpreted by the applications.
This QK-A027 is the cheapest and powerfull AIS-GPS receiver available on the market.
In conjunction with the QK-A031 (I will order this item), you could build a cheap and really performant network on your boat and make all your instruments talking together.
Thanks to the Quark-Elec team

Peter | March 1, 2018

QK-A024 WiFi works perfectly with iSailor on my iPad

For A024 AIS Receiver with multiplexer + WiFi

I wanted a simple lightweight inexpensive way of testing out AIS making my crossings of shipping lines safer and easier. I have a small sailboat with no real plotter, only use my iPad and other iOS and Android devices as backups and use iSailor as main navigation software.

I bought the product through Tindie on a Monday and I believe it landed in my home country already Thursday. Very impressed with how quickly I received the product from England to Denmark.

Upon receiving the AIS I bought a small AIS/VHF antenna with 20 meters of cable attached and set out to test the AIS receiver immediately. Unfortunately there wasn't any data transmitting into iSailor on iPad. The LED lights of the QK-A024 would blink red and green but you are not able to see in documentation, called Application Note, what these 3 LED lights mean and how they should react. Through the Forum I have received help with this and a notice that documentation will be updated - thank you!

But my problem was not at all with the AIS receiver nor my antenna. The problem with no data in iSailor was due to the bad documentation of iSailor. I had bought all AIS inApp purchases needed but I also needed to do extra AIS input settings inside the APP which to me was not obvious.

After inputing data to iSailor, data all found in the QK-A024 Application Note, iSailor showed AIS targets immediately.
My boat is currently on the hard, behind trees and obstacles, but the QK-A024 was still able to see AIS targets 5 nautical miles out with the antenna mounted on the stern pulpit.

I definitely recommend the product for easy access to AIS data through WiFi. I have not tested other features as I have no NMEA network on my boat.
Thumbs up!

Best regards, Peter

Rob | Dec. 20, 2017

Perfect for both vessel as home device AIS receiver

For A026 Wireless AIS+GPS Receiver

Super, easy device for showing AIS data on any pc. Just connect the VHF and GPS antenna's, plug the USB and off you go. Via a simple phone loader you have wifi access. I used it together with OpenCpn.

Very content with this purchase

Rob van der Meulen

Erkki | Sept. 18, 2017

Very, very good all in one GPS + AIS receiver!

For A026 Wireless AIS+GPS Receiver

This little box contains all you can whish for, real dual channel AIS receiver,
a really good GPS receiver, all sorts of connectivity, from old school RS232
to USB and WIFI !
So you can connect it to everything very easily.
Power is easy just connect it to a USB port and all the fun wakes up very fast.
And all this for a very good price !
I will prolly order one extra as backup :-)

If you are even remotely intersted in AIS and /or GPS, get one !
it doesn't get easier or cheaper than this.

James | April 10, 2017

This works great!

For A026 Wireless AIS+GPS Receiver

I purchased the QK-A026 Wireless AIS+GPS Receiver, an inexpensive active GPS antenna, and an inexpensive VHF antenna.

After I bought this I had really high hopes for it. As it turns out my hopes have been mostly realized. I can connect iNavX on my iPad and MacENC on my Macintosh computer wirelessly and receive GPS and AIS data while the A026 is happily providing AIS target data to my Garmin GPSMap 3206 chart plotter.

I had hoped that I would be able to add one of my other NMEA output devices to the the NMEA in on the A026 but I don’t have any more NMEA ports available on my network. My nav network is actually two separate ones. One is an old SeaTalk network by Autohelm and the other is an old Garmin ethernet network.

Anyway, I am ecstatic with the way this has worked out. I will be installing it permanently when I get a VHF antenna splitter and a way to power the A026 in the console.

YouTube Video of my installation. - > https://youtu.be/4OofGHCp8oo

Glen | Jan. 30, 2017

Fantastic product

For A026 Wireless AIS+GPS Receiver

I stumbled across this product while searching for ways to get AIS into OpenCPN with my Raspberry Pi. Not only does this provide AIS, but also GPS and connects to. NMEA 183 and routes that on wirelessly! I can't believe it's all there for a phenomenal price.
The product looks robust enough for a boat, but will still require a nice dry boat locker, so no worries there.
I ordered this on Monday after Christmas and I was setting it up Friday afternoon. Not bad considering it was shipped to Denmark,
That same day I was then down at the chandlery picking up some installation fitting and they were impressed as it seemed to provide everything that their cheapest model did for about 5 times less the price of what they had on their shelves. So all in all, I'm very pleased.
As soon as I see the QK-A031 available I'll be ordering that. The A031 should then give me additional NMEA and SeaTalk hookups. Again something I'd be speeding much, much more if I bought from another suppliers product.
I don't know much about Quark, but I'll be seriously watching their products page and waiting for new marine devices to be developed.
Glen

Lars | Jan. 13, 2017

AIS receiver QK-A023

For QK-A023 Ship/Boat/Marine AIS Wireless Receiver

I am absolutely satisfied with the QK-A023 so far.
It was easy to install and to integrate into OpenCPN . Both connections, USB and Wireless, worked seamless and without any problems.
I have only tested the receiver at home which is a few kilometer away from the next ships but even with a home brew VHF emergency antenna the reception was brilliant. I could see every ship that was announced by marinetraffic.com. I am looking forward for the new sailing season to use the device on my boat.

Brilliant product!