Hi all,
I’m coming into this discussion a little late…
I’ve been working with Fred at Sekhmet for over 5 months now testing these gauges. Sekhmet’s goal is simple, provide the very best gauge to the airgun community. Thanks to @centercut for introducing us!
The disclaimer… I am in no way affiliated with Sekhmet. Like everyone else, I’ve struggled with inaccurate gauges for some time now. Even when I replaced my factory gauges with the Wika gauges, I found myself still wanting to know the exact bar I was running. For these old eyes, going digital is exactly what I was looking for.
Below is a short review of my journey with Sekhmet. I will tell you now that the latest product release is the best yet and they are still trying to make them even better. I will without a doubt be running these gauges on my airguns
So a little bit about the gauges...
The first batch of gauges I received had a few issues:
The second batch of gauges I received had all the previous issues resolved (as mentioned above) and the firmware had been updated to V4.34 20G18.
Fred is about to send me the latest version of the stainless steel gauge with V 4.40 firmware. He says the gauge is even more stable and has new functionality including:
So what’s next for Sekhmet?
They are still working to make the gauge better via firmware. The firmware updater is finished but they are still looking for a factory to produce the downloader. Once that’s complete, every user will receive a downloader and will be able to update the gauge firmware once new versions become available.
Final thoughts:
PROs
CONS (or just feedback)
Wishlist
Want to know a little more? Here are some additional details.
http://www.sekhmet-us.com/digital-pressure-gauge.html (be patient, the page is slow to load)
Hope this helps, -Dave
I’m coming into this discussion a little late…
I’ve been working with Fred at Sekhmet for over 5 months now testing these gauges. Sekhmet’s goal is simple, provide the very best gauge to the airgun community. Thanks to @centercut for introducing us!
The disclaimer… I am in no way affiliated with Sekhmet. Like everyone else, I’ve struggled with inaccurate gauges for some time now. Even when I replaced my factory gauges with the Wika gauges, I found myself still wanting to know the exact bar I was running. For these old eyes, going digital is exactly what I was looking for.
Below is a short review of my journey with Sekhmet. I will tell you now that the latest product release is the best yet and they are still trying to make them even better. I will without a doubt be running these gauges on my airguns
So a little bit about the gauges...
- The gauge is 28mm with 1/8 BSPP threads (though I think they offer M10*1.0 and 1/8 NPT as well)
- They comes in two flavors:... steel and brass (for the brass they use C86300 brass)
- The whole unit is waterproof with a rating of 30 min under 0.5 meters of water
- The pressure sensor is the same as the Edgun EDMU
- Pressure range is from 1-400 bar (15-6000 PSI)
- Accuracy is ±0.5 PSI (per Sekhmet)
- Weight is appx 50g
- Battery is a 145mah Li-ion (non-replaceable)
- Charge time is appx 1 – 1.5 hours via the provided USB/magnetic horseshoe type cable
- The charge can last for many months (depending on your mode selection)
- The charging current is 120ma
- The touchscreen is a 0.49” OLED Screen w/ three main touchpoints
- There are three basic modes: Screen ON, Sleep and Wake Up w/ Screen Off
- There are ~ 8 different readouts (depending on the firmware version)
- Updatable firmware (coming soon!)
The first batch of gauges I received had a few issues:
- Two of the gauges I received had pretty good size chips in the crystals (very noticeable) – This has been fixed! The crystal has since been replaced with a better crystal. Product packaging is also much better
- Two of the charging cables were unusable. There were inconsistencies with the brass charging pins on them. Some were rigid, others are springy, and the two that didn’t work were actually depressed into the charger so no pins wee usable. Again, this has been fixed! Turns out the original cables I was sent were 3D prototypes. The ABS production cables are much better. Also, the magnet size on the production cable shoehorn are a bit larger and are stronger.
- The original crystal smudged easily and was difficult to get clean. The new crystal is much improved in this respect
The second batch of gauges I received had all the previous issues resolved (as mentioned above) and the firmware had been updated to V4.34 20G18.
Fred is about to send me the latest version of the stainless steel gauge with V 4.40 firmware. He says the gauge is even more stable and has new functionality including:
- Quick data clear key combination. Keep touching the middle key then touch the right one and it will clear all data quickly
- More sensitive shot counts. Some low power gun's pressure drops off slightly, it's very similar to a small leak. This gauge can now distinguish a shot from a slow leak.
- Better battery detection. In the previous version, some gauges would not show 100% battery after a full charge.
- Abnormal pressure change detection. If the pressure changes more than 110 bars within 0.3 seconds, the gauge will hold the reading, because there are some factors like EMI that could affect the sensor (per Sekhmet)
- Fred also added that they have their own warehouse in the UK now.
So what’s next for Sekhmet?
They are still working to make the gauge better via firmware. The firmware updater is finished but they are still looking for a factory to produce the downloader. Once that’s complete, every user will receive a downloader and will be able to update the gauge firmware once new versions become available.
Final thoughts:
PROs
- The battery. The highest working current is 14-17ma while the display is turned on. With the gauge shutdown, standby current goes down to 9-10ua, which means that this battery could support the whole system for about 400 days if you don't wake it up manually. The gauge I used for my reg was only down to 76% after sitting for 2 months (and that's after shooting for 2 days straight!)
- The LED is one of the best I have ever seen on something this small. Also works well in sunlight and is clear when looking at it from different angles
- I like the way you can invert the display 180 deg.
- Updatable firmware (coming soon)
- Gauge is very responsive even when coming out of sleep mode
- Charging is fast
- Menu is easy to use
- PSI seems to be very accurate. I compared it to my Wika and it appears to be spot on
- Nice packaging and very well protected
- The new charging cables are much nicer and the length of the cable is good
CONS (or just feedback)
- There is no screen protector (thin film) on the bezel when shipped. This is just feedback and none of the gauges were scratched. It's just a nice touch and adds a bit of temporary protection
- While the charging magnets are powerful, getting the horseshoe charger to line up with the charging contacts takes a bit of finesse.
- Along the same lines as above, I'm concerned that all the movement of trying to align the horseshoe charger with the charging contacts might scratch the bezel or the contacts after time. Only time will tell.
Wishlist
- When I bought my Wika gauges, each came with a black plastic piece that you could slide over the gauge. This was for folks that wanted to keep the black theme on their guns. It also serves as added protection when you get into some of the NRL22 type competitions where they could get scratched or damaged
Want to know a little more? Here are some additional details.
http://www.sekhmet-us.com/digital-pressure-gauge.html (be patient, the page is slow to load)
Hope this helps, -Dave