Accessory | Humidity & Temperature Monitor
Most safe owners run a dehumidifier and assume it's working. This monitor tells you for certain. Place it inside your safe and the LCD display shows current humidity and temperature, refreshing every 10 seconds so you're always looking at a current reading rather than a stale one.
Beyond live readings, it logs the highest and lowest humidity and temperature your safe has reached since the last reset. That historical record tells you whether your humidity control is actually holding the line or just masking a problem.
What's Included
- ✓Humidity and temperature monitor
- ✓1x AAA battery
- ✓Built-in flip-out stand
- ✓Built-in magnet mount
Specifications
| Display | LCD digital |
| Refresh Rate | 10 seconds |
| Dimensions | 3.1" x 2.6" x 0.8" |
| Mounting | Flip-out stand or magnet |
| Tracks | Current, high, and low readings |
| Battery | 1x AAA (included) |
| Part Number | 15852 |
Target Range for Gun Safes
Humidity: 40% to 50% RH
Above 50% risks rust and corrosion on metal surfaces. Below 30% can dry out wood stocks and leather. The 40-50% range protects both.
Temperature: 60°F to 75°F
Sustained heat above 80°F accelerates humidity fluctuation. Consistent temps reduce moisture cycling and protect wood, leather, and finishes.
Placement
Position the monitor on a shelf where you can see it when you open the door. The magnet mount sticks to any steel surface on the interior wall or door. The flip-out stand works on flat shelves when the safe door faces away from direct view.
Some owners run two monitors, one inside and one outside the safe, to see exactly how much their dehumidifier or desiccant is reducing ambient humidity. The difference in readings confirms whether your humidity control is actually working.
Setup
Install the included AAA battery, position the monitor inside your safe, and it starts reading immediately. One button switches between Fahrenheit and Celsius or resets the tracked highs and lows. No pairing, no app, no configuration.
Test the battery first: Some units arrive with a discharged battery from shelf storage. If the display doesn't light up, swap in a fresh AAA before assuming the unit is faulty.
Common Questions
What humidity level should my gun safe be at?
The target range for most gun safes is 40% to 50% relative humidity. Above 50% creates conditions for rust and corrosion on metal surfaces. Below 30% can dry out wood stocks and leather. This monitor lets you see exactly where your safe sits and whether your humidity control is keeping it in range.
Do I need this if I already have a dehumidifier in my safe?
Yes, and that is exactly the right time to use one. A dehumidifier tells you nothing about whether it's working. This monitor tells you the actual humidity level, the historical highs and lows, and whether conditions are staying within the safe range. Running both together gives you control instead of just assumption.
Where is the best place to put the monitor inside the safe?
Place it on a shelf you can see when the door opens, away from direct contact with the dehumidifier or desiccant. Positioning it near the dehumidifier will show artificially low readings. Mid-safe placement gives you the most representative reading of overall interior conditions.