MistKing HT-24 Hygrostat/Thermometer

The MistKing HT-24 is a dedicated hygrostat controller designed to work with any existing MistKing misting system. Rather than running on a fixed timer, it continuously reads live humidity from a remote probe and activates the pump only when conditions require it — giving you genuinely responsive, demand-led humidity control for vivaria, terrariums, or greenhouse enclosures.

How It Works

The HT-24 connects directly into your MistKing 24V power supply rather than a mains outlet, keeping everything low voltage and integrated with your existing setup. The remote humidity and temperature probe feeds live data to the controller, which then triggers misting based on your programmed targets rather than a schedule alone. This means humidity is maintained accurately without over-misting.

Day and Night Humidity Programmes

Separate day and night humidity targets can be set independently, with user-defined start times for each mode. This is particularly useful for species that require a humidity drop overnight — a common requirement for many tropical and rainforest reptiles. A variance setting lets you define how far humidity can drop before the pump engages again, reducing unnecessary misting cycles and mimicking more natural fluctuation patterns.

Key Features

• Backlit LCD control panel
• Remote humidity and temperature probe
• Separate day and night humidity targets with programmable mode start times
• Variance setting to control the humidity drop threshold before pump activation
• Manual override for on-demand misting without disrupting your programmed schedule
• Low humidity alarm with audible alert if relative humidity drops to your set threshold
• Rechargeable internal battery retains all settings during power interruptions
• Low voltage design — connects directly to MistKing power supply, not a mains socket
• Compatible with any existing MistKing misting system

Practical Example

Set a day target of 75% RH, a night target of 60% RH, a low humidity alarm at 40%, and a variance of 5% — the system will mist up to 75%, then allow humidity to fall to 70% before activating again. This gives you precision without constant pump cycling, and an audible warning if conditions ever drop to a critical low.

For keepers who want humidity maintained by condition rather than guesswork, the MistKing HT-24 brings proper hygrostat logic to an existing misting setup — a straightforward upgrade that makes a meaningful difference to enclosure stability.