The TROPO Precipitation Gauge is the next generation 4-inch all-weather professional precipitation gauge that meets the accuracy and specification requirements of CoCoRaHS. The TROPO is the approved, premium CoCoRaHS* gauge option.
Included in the box:
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The TROPO is the first comprehensive refresh of the 4-inch Stratus All-weather Rain Gauge, which was first introduced way back in 1973! Based on the design of NOAA’s National Weather Service official standard 8” rain gauge, the TROPO Precipitation Gauge uses the same dual cylinder design to measure precipitation with a resolution of 0.01” (.25 mm).
The inner cylinder holds 1 inch (25 mm) of precipitation, while the extra-large outer cylinder holds another 12.50 inches (317.5 mm) of precipitation making the maximum capacity approximately 13.5” (343 mm). The inner cylinder and funnel top cap are removable to allow catchment of snowfall or other frozen precipitation, which can then be melted down or weighed to determine a liquid equivalent.
The gauge is made of a UV stabilized Polycarbonate; the same weather resistant material as greenhouses.
This is the most advanced, accurate and easy-to-use manual precipitation gauge available.
For more details see TROPO page.
Note: Custom station ID labels are sold separately.
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PACKAGING NOTICE: This product may ship in a box that reveals its contents. If this is a concern, please contact us to see if other options are available.
* A portion of proceeds are donated to CoCoRaHS!
The Tropo rain Gauge solved a number of problems I had with the Stratus Gauge I've been using for 30+ years. I need to mount the gauge on a pole to get it high enough to avoid the community sprinklers. I had the Stratus mounted to the pole using Bungee cords, not exactly ideal. The tropo with the included ties mounts securely to the pole. I also had problems with bird poop which the included bird spikes should take care of. It is also, much easier to put the tube back in, it balances nicely compared to the Stratus. It is also easier to read the rain accumulation and the spout & handle makes it easier to pour amounts over 1 inch. Great Job, highly recommended!
I’ve recently purchased the Tropo rain gauge, and it has been excellent. It is very accurate and best of all easy to use. I really enjoy the forethought that they had designing this gauge all the way down to the accessories that it came with. The brush I didn’t think I’d really need, but it really comes in handy more than I would have thought. If you’re having reservations buying this product… don’t. I highly recommend it!
I knew when I opened the box that I had made the right choice when I ordered. I have now had over an inch at time. It's easy to pore from the large cylinder in to the small one. I recommend this for everyone wanting a new gauge.
Got mine in today and very impressed! Although the installation instruction fails to mention how high does the top of the cap/funnel have to be from the top of the beveled edge of a 4x4. on the other the rain gauge the instruction mentions this! Cannot find any other information so that I can correctly install the Tropo.
Great product to read rain acumulations and a new inversion for CoCoRaHS.
Loving this rain gauge. It is so very well designed, manufactured and packaged. I drove a metal fence post in the ground and had it mounted and ready for rain in about 30 minutes. I have a Davis electronic, automated rain gauge that is super convenient to use/read but it's nowhere near as fun as actually seeing the water collect and getting a much better "feel" for just how much rain is 0.02 inches. Or 1.67 inches! Well done Climalytic!
The Tropo rain gauge is great. It is made with high quality materials that give it a great fit and finish. It is also extremely clear, which makes taking readings even easier. I also love that the top snaps on keeping it in place, and that the inner tube has the funnel built into it making the whole thing easier. I highly recommend to anyone looking for a high quality gauge.
I installed the gauge the day in it arrived. A few days later we had a nice rain event. The reading of the gauge is much more precise and easy than my old gauge. This is truly a scientific instrument.
It's a thing of beauty and scientific! Can't wait for some rain. Thank you.
Out-of-the-box I was impressed by the crystal clear optical clarity of the cylinder material, and the sharp resolution of the laser engraving. A comment on the material: Based on specifications, I believe the material used will have longer clarity life using its UV enhanced material. This state-of-the-art construction almost felt 'flimsy' at first, because of appearance and material, compared to the 'other name', but it is at least as strong-- maybe stronger. Impressive. The outer cylinder measurement lines are an impressive addition, just be sure to use them as an approximation, as emphasized in the documentation. I compared the inner cylinder measurements (water density/weight measurements), with 6 "other name" cylinders of various production cycles, and found the Tropo one hundred percent consistent from .01" to 1", while the "other" name varied from 2%-10% across various volumes/cylinders. And, out of curiosity, on this specific instrument, I DID check the outer gauge markings 'for approximations', and determined, that on this production run, they were very accurate, but will state again, they're NOT to be used for measurement, follow the decant procedure. The mathematically computed slight taper of the cylinders and laser controlled post-process engraving has produced what appears to be a very accurate instrument, within it's resolution of 0.01". The funnel design of the inner cylinder is very convenient for outer cylinder decant into the inner cylinder. Even easier with the 'pour' spout molded in the outer cylinder! Just note the position of the Tropo's precision 1" overflow slot, to avoid decant spillage. Again, the 6 "other name" cylinders 1" overflow varied from -0.02" to +.03". I believe the 'nesting' design will aid in preventing evaporation loss. Upper cap has a 'locking' feature to minimize 'blow offs' which MAY be a little 'tight' on first few uses. The unit came with 8 optional bird spikes, which are obviously sharp, and with that snap-on cylinder cap, I'd urge care with my hands/eyes. I added tiny silicon tips to mine. There has been effort and thought into the cylinder designs, most not obvious at first... e.g. seating the inner cylinder into the outer is remarkable easy, compared to the 'hit-or-miss' balancing act on the 'other name'. The mounting bracket design and construction is a major innovation. It inserts easily, and 'snaps' slightly to lock. More importantly, it required just a minor tap to free when 'frozen', compared to very difficult removal on the 'other name' gauge. I did not evaluate the 'pole' mount, though that design is similar to the 'post' bracket. The addition of an add-on handle should prove welcome to those in high precip regions, especially since this will hold 13" liquid! I initially found it slightly cumbersome and a bit awkward during the few opportunities, choosing to utilize those wonderful finger grip moldings on the outer cylinder. Like anything new, some experience will prove its value!
From careful measurements by weight it is clear that TROPO is more accurate than similar 4" rain gauges on the market. The longer inner tube is easy to read. I expect TROPO will be the premier manual rain gauge for years to come.
Sleek design, highly accurate, easy to mount, and simple to use. Some highlights that will not disappoint: Easy slide on/slide off secure/sturdy mounting bracket, convenient pour spout on the large tube and a brilliantly designed handle that slides onto the outer tube's mounting bracket to pour off your precip in excess of 1" into the inner tube. As a beta tester, I feel privileged to evaluate this excellently designed rain gauge and provide feedback to make it a better product for a wider audience.
