Boveda One Step Hygrometer Mess Free Calibration Kit – Preloaded 75% RH 2-Way Humidity Control – Hygrometer Accuracy – Precise Test for Digital and Analog Hygrometers and Humidity Sensors – 1 Count

I've used this to calibrate 4 hygrometers so far: 3x SensorPush sensors and 1x AcuRite 01080 Pro . It's incredibly easy to do, just zip the hygrometer into the bag and wait. Once the humidity readings settle, they should read exactly 75.5%. There are a few things to be aware of: 1) This is advertised as both a 75% and 75.5% calibration kit. In reality it is 75.5% - but that half % isn't overly meaningful for most hygrometers - especially if they don't report decimal points anyway. Just keep in mind that if yours does report decimal places, you should target 75.5%. 2) Be patient! This is advertised as taking between 24-36 hours for the humidity to settle, and I read several reviews where people thought it was done in as little as 6-8 hours. With the ones I've calibrated, they got within 5% of the final RH in the first 6 hours - and were within 2% of the final RH within 24 hours. In all 4 cases, they didn't truly settle until close to the 36 hour mark and I would have been miscalibrating the hygrometers if I pulled them out early. Just remember, if you're going to go through the trouble of calibrating your hygrometer, be patient and wait a full 36 hours. Ending the calibration early won't help if the calibration ends up being incorrect. (NOTE: I wouldn't have even noticed it wasn't done if I weren't looking at the SensorPush graphs on the first calibration - it seemed like it had settled when just looking at the current numbers.) Another thing that wasn't clear to me is that these packs are re-usable for up to 3 months. If you have 3 hygrometers to calibrate, you don't need 3 packs - just calibrate them back to back (which for me, made it even harder to be patient when I realized the humidity level was still creeping up slowly after 24 hours). If you do care enough about the accuracy of your hygrometer to go through the trouble of calibrating them - then I highly recommend using these little packs from Boveda. The overall process couldn't be simpler.

Está bien

Di sicuro il miglior modo per tarare con estrema precisione il proprio igrometro. Sono rimasto molto soddisfatto! Consiglio l'acquisto a tutti coloro che vogliono incollare la proprio lancetta al 75%.

Perfekt um das hygromether einzustellen

I'm in the process of designing a product that measures the temperature and humidity of beehives. There are plenty of temperature sensors on the market that are cheap and accurate, but humidity sensors are generally pretty expensive in comparison and, as I've discovered, wildly inaccurate. Having purchased a sensor that I had some confidence in, I needed to test it. I created my own testbed, with very accurate control of temperature, but I needed a way to accurately define a level of humidity. There are a plethora of YouTube vids on the subject demonstrating how this can be achieved using a home-made salt solution in a bottle cap, but even having purchased some lab-grade sodium chloride and distilled water my results were all over the place. It was while I was doing more research along these lines when I can across some adverts for Boveda products in relation to maintaining the humidity in humidors, a cupboard for cigars. Looking at the Boveda website I discovered that they produce larger product packs for cigars, but also produce smaller packs with high tolerance chemical solutions that can be used for hygrometer (an instrument used for measuring the amount of humidity and water vapour in the atmosphere) calibration and purchased a pack. The Boveda One-Step Hygrometer Calibration Kit allows a high degree of reliability, with a high degree of accuracy simply by placing the hygrometer, or in my case the sensor, in a small airtight container. The kit comes complete with an air-tight plastic bag and the Boveda humidity pack. To use it, you just put the device to be tested in the bad and let the humidity in the bag settle for 12 hours or so, it's as simple as that. In my case, I placed the sensor in a small bag, sealed the bag around the wires from the sensor and placed the whole pack into my chiller. At a consistent 21.5 DegC (+/- 0.3 DegC), I let the sensor soak for a day and then analysed the results. Long story short then, the results where excellent. Incredibly stable humidity results, at exactly the level I was expecting, well within the tolerances stated by Bovida and the sensor I was calibrating during my experiments. I certainly won't be mucking about with salt solutions any more. My only regret is that I've spent a fair amount of money of lab-grade chemicals and that my better half is getting peeved with the 1Kg of salt that's taking up cupboard space. Still, I guess I can use it on my fish & chips?