--- product_id: 383862801 title: "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" brand: "boveda" price: "€ 39.34" currency: EUR in_stock: true reviews_count: 5 category: "Boveda" url: https://www.desertcart.sk/products/383862801-boveda-one-step-hygrometer-mess-free-calibration-kit-preloaded-75 store_origin: SK region: Slovakia --- # 24-hour quick setup 75% RH precision calibration Reusable for multiple calibrations 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 **Brand:** boveda **Price:** € 39.34 **Availability:** ✅ In Stock ## Summary > 📏 Calibrate like a pro, measure with confidence—never second-guess your humidity again! ## Quick Answers - **What is this?** 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 by boveda - **How much does it cost?** € 39.34 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/383862801-boveda-one-step-hygrometer-mess-free-calibration-kit-preloaded-75) ## Best For - boveda enthusiasts ## Why This Product - Trusted boveda brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Convenient:** Slim 4.5 x 9-inch bag fits easily into any workspace or storage area without clutter. - • **Effortless Precision:** Calibrate any hygrometer with a simple 24-hour seal-in process—no batteries or activation needed. - • **Long-Lasting Reliability:** Each kit lasts about a year, supporting multiple calibrations to keep your readings flawless. - • **Trusted Lab-Grade Accuracy:** Utilizes Boveda’s 75.5% RH standard, the gold standard for professionals and chemists alike. - • **Maintenance-Free Confidence:** No fuss, no mess—just accurate humidity control calibration whenever you need it. ## Overview The Boveda One Step Hygrometer Calibration Kit offers a hassle-free, lab-validated method to ensure your digital or analog hygrometers read precisely at 75% relative humidity. Simply seal your device inside the preloaded 75% RH bag for 24 hours, then adjust your hygrometer accordingly. Designed for professionals and enthusiasts alike, this reusable, maintenance-free kit guarantees accurate humidity readings for up to a year, enhancing your environment control with trusted precision. ## Description The One-Step Calibration Kit is a simple and surefire method to accurately calibrate any digital or analog hygrometer or humidity sensor. The One-Step Calibration Kit utilizes Boveda's 75.5% relative humidity standard, which is widely used and accepted by chemists and lab professionals to determine the accuracy of any hygrometer (also known as the "salt test"). Simply place your hygrometer inside the bag, close the zipper, and wait 24 hours. A perfectly-calibrated hygrometer will read 75% Rh. If your hygrometer reads above or below 75%, adjust the calibration by the number of percentage points it is off from 75%. Review: I can trust it for my cigar humidors and “tupper-does” - Tested across my three hydrometers I use and after a week of them being in a sealed bag and container they didn’t vary more than 0,2% rh , so I think this process works reliably. Don’t know if the packet was exactly the rh indicated but I think it’s close enough for my needs. This is better than other methods I’ve tried. Review: Está bien - Está bien ## Features - Simply place your hygrometer inside the bag, close the zipper, and wait 24 hours. A perfectly-calibrated hygrometer will read 75% RH. If your hygrometer reads above or below 75%, adjust the calibration by the number of percentage points it is off from 75%. - Completely maintenance free - no activation required. Easy to use. - Bag Dimensions: 4.5-Inch x 9-Inch. - Lasts approximately one year, good for multiple calibrations. Shelf life before opening is a minimum of 2 years. - Produces an environment of 75-percent humidity ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000A3UBLA | | Brand | Boveda | | Brand Name | Boveda | | Colour | White | | Country of Origin | USA | | Customer Reviews | 4.6 out of 5 stars 3,037 Reviews | | Global Trade Identification Number | 00850661003311 | | Item Weight | 0.03 Pounds | | Manufacturer | Humidi-Pak | | Material | Plastic | | Material Type | Plastic | | Model Number | CAL75-SM | | Net Quantity | 1.00 Count | | Part Number | CAL75-SM | | UPC | 850661003311 | | Unit Count | 1.00 Count | | Warranty Description | no warranty available | ## Product Details - **Battery Description:** No batteries required - **Brand:** Boveda - **Colour:** White - **Item Weight:** 14 g - **Manufacturer:** Humidi-Pak ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/61bJ1fEGCaL.jpg) ![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 - Image 2](https://m.media-amazon.com/images/I/61myzOQAniL.jpg) ![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 - Image 3](https://m.media-amazon.com/images/I/61V9BHg-+zL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ I can trust it for my cigar humidors and “tupper-does” *by 5***E on 19 April 2026* Tested across my three hydrometers I use and after a week of them being in a sealed bag and container they didn’t vary more than 0,2% rh , so I think this process works reliably. Don’t know if the packet was exactly the rh indicated but I think it’s close enough for my needs. This is better than other methods I’ve tried. ### ⭐⭐⭐⭐⭐ Está bien *by J***Z on 22 January 2025* Está bien ### ⭐⭐⭐⭐⭐ Prodotto fantastico *by W***I on 8 June 2018* 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%. ## Frequently Bought Together - 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 - Govee Bluetooth Hygrometer Thermometer, Wireless Thermometer, Mini Humidity Sensor with Notification Alert, Data Storage and Export, 262 Feet Connecting Range - Boveda 72% Two-Way Humidity Control Packs For Wood Humidifier Boxes – Size 60 – 4 Pack – Moisture Absorbers – Humidifier Packs – Hydration Packets in Resealable Bag --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sk/products/383862801-boveda-one-step-hygrometer-mess-free-calibration-kit-preloaded-75](https://www.desertcart.sk/products/383862801-boveda-one-step-hygrometer-mess-free-calibration-kit-preloaded-75) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-05-20*