---
product_id: 254231207
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: "€ 20.27"
currency: EUR
in_stock: true
reviews_count: 5
category: "Boveda"
url: https://www.desertcart.pt/products/254231207-boveda-one-step-hygrometer-mess-free-calibration-kit-preloaded-75
store_origin: PT
region: Portugal
---

# Lasts ~1 year, multiple calibrations Patented saltwater-based 75% RH Mess-free airtight calibration bag 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:** € 20.27
**Availability:** ✅ In Stock

## Summary

> 🧂 Seal the deal on perfect humidity—calibrate like a pro, every time!

## 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?** € 20.27 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/254231207-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

- • **Effortless Calibration:** Simply zip your hygrometer in the airtight bag—no mess, no fuss, just check back in 24 hours.
- • **Precision You Can Trust:** Patented saltwater formula guarantees exact 75% relative humidity for flawless calibration.
- • **Long-Lasting Reliability:** One kit supports multiple calibrations over a year, ensuring your devices stay accurate without constant replacements.
- • **Professional-Grade Accuracy:** Ideal for both digital and analog hygrometers, trusted by cigar aficionados and lab pros alike.
- • **Maintenance-Free Convenience:** Ready to use out of the box with no activation needed—calibrate your hygrometer hassle-free every 6 months.

## Overview

The Boveda One Step Hygrometer Calibration Kit offers a patented saltwater-based, mess-free solution to precisely calibrate your hygrometers at 75% relative humidity. Designed for both digital and analog devices, it ensures professional-grade accuracy with effortless use—just seal your device in the airtight bag and check after 24 hours. Durable and maintenance-free, this kit lasts about a year and supports multiple calibrations, making it the go-to choice for cigar enthusiasts and professionals demanding reliable humidity readings.

## Description

Even if your hygrometer says it doesn’t need to be calibrated, it does—every 6 months. Find out if your hygrometer is giving accurate readings with the Boveda One-Step Calibration Kit, an easy-to-use, professional-level salt test. An uncalibrated hygrometer is like using no hygrometer. You’ll never get an accurate relative humidity (RH) reading from a hygrometer or humidity sensor until it’s precisely calibrated. A well-calibrated hygrometer gauges if your premium cigars are stored at proper RH. Chemists and lab professionals determine the accuracy of a hygrometer with a “salt” test. Unlike the bottle cap salt test, the Boveda One-Step Calibration Kit is precise, mess-free and ready-to-use. Just slip a hygrometer in the airtight, high-density bag preloaded with Boveda. The patented saltwater-based pack uses natural salts and pure water to achieve 75% RH inside the bag. After 24 hours, check the hygrometer’s reading. If it doesn’t read 75% RH, your hygrometer is off. Simply adjust it, zip it back in the bag with the Boveda and verify the reading the next day. For added accuracy, perform a 2-point calibration with the 32% RH Boveda One-Step Calibration Kit (sold separately) to check the high and low RH readings of your hygrometer. Note: Do not mix different Boveda RH levels within the same humidor. And do not use Boveda in the same humidor with other humidification products because they will fight against each other and reduce the efficiency of Boveda.

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: Very easy to use - Ass always, boveda is the best for your cigars

## Features

- PATENTED SALTWATER-BASED BOVEDA is the ultimate salt test! Do-it-yourself calibration methods, like bottle cap salt tests are imprecise and inaccurate
- EASY, MESS-FREE CALIBRATION—Simply place a hygrometer or humidity sensor in the airtight high-density bag with the enclosed Boveda humidity pack. Zip closed and check back in a day
- Completely maintenance free - no activation required. Easy to use.
- 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
- Exterior Bag Dimensions: 5.5" x 7"
- Interior Bag Dimensions: Approx 4" x 4.5"
- Bag Dimensions: 4.5-Inch x 9-Inch.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000A3UBLA |
| Brand | Boveda |
| Brand Name | Boveda |
| Color | Brown |
| Colour | Brown |
| Customer Reviews | 4.6 out of 5 stars 3,042 Reviews |
| EU Spare Part Availability Duration | 1 Years |
| Global Trade Identification Number | 00850661003311 |
| Included Components | 1 Calibration Kit & 1 Humidity Control Packet |
| Item Weight | 0.03 Pounds |
| Item weight | 0.03 Pounds |
| Manufacturer | Quality Importers Trading Co, Inc. |
| Material | Plastic |
| Model Name | CAL75-SM |
| Model Number | CAL75-SM |
| Operation Mode | Manual |
| Operation mode | Manual |
| Other Special Features of the Product | Single-phase calibration kit, salt test, maintenance-free 75% moisture |
| Part Number | CAL75-SM |
| Room Type | Add Boveda to Airtight Container, Glass Jar, Storage Bags, Humidor and More to Maintain Humidity |
| Room type | Add Boveda to Airtight Container, Glass Jar, Storage Bags, Humidor and More to Maintain Humidity |
| Runtime | 2 minutes |
| Smart Home Compatibility | Not Smart Home Compatible |
| Special features | Single-phase calibration kit, salt test, maintenance-free 75% moisture |
| UPC | 850661003311 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Boveda
- **Colour:** Brown
- **Item weight:** 14 g
- **Operation mode:** Manual
- **Special features:** Single-phase calibration kit, salt test, maintenance-free 75% moisture

## 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.

### ⭐⭐⭐⭐⭐ Very easy to use
*by I***H on 16 July 2024*

Ass always, boveda is the best for your cigars

### ⭐⭐⭐⭐⭐ Está bien
*by J***Z on 22 January 2025*

Está bien

## 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
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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-07-16*