Meross Presence Sensor MS605 vs Third Reality Smart Presence Sensor R3 comparison

Data from Amazon and official Meross and Third Reality sites.

2026 verdict

In this 2026 Meross Presence Sensor MS605 vs Third Reality Smart Presence Sensor R3 comparison, Meross Presence Sensor MS605 comes out ahead thanks to price, warranty, and weather resistance. What pushes it ahead is price, warranty, and weather resistance, and connectivity and integrations keep the advantage from looking narrow. Choose Third Reality Smart Presence Sensor R3 only if rating matters more to you than the broader advantage from Meross Presence Sensor MS605. That keeps the verdict firmly in favor of Meross Presence Sensor MS605.

Winner

Meross

Meross Presence Sensor MS605

6% OFF

$25.99

$27.59

Buy on Amazon USA

Third Reality

Third Reality Smart Presence Sensor R3

$49.99

Buy on Amazon USA

Price alerts

Presence Sensor prices change while you decide

We check the price of every Presence Sensor in the catalog daily and email you the drops, whichever one you pick.

Your subscription could not be saved. Please try again.

Your subscription has been successful.

Feature	Meross Presence Sensor MS605	Third Reality Smart Presence Sensor R3	Winner
Price	$25.99	$49.99	Meross Presence Sensor MS605
Rating	2.9	3.6	Third Reality Smart Presence Sensor R3
Warranty	2 years	1 year	Meross Presence Sensor MS605
Weather Resistance	IP67	NO	Meross Presence Sensor MS605
Connectivity	Bluetooth, Thread Protocol	Zigbee	Meross Presence Sensor MS605
Integrations	Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter	Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant	Meross Presence Sensor MS605
Sensors	Presence, Light	Presence, Light	Tie
Alerts	Presence Alerts	Presence Alerts	Tie
Multi-Person Detection	NO	NO	Tie
Range of Detection	6m / 19ft	6m / 19ft	Tie

Winner

Meross

Meross Presence Sensor MS605

6% OFF

$25.99

$27.59

Buy on Amazon USA

+ Price: $25.99
+ Warranty: 2 years
+ Weather Resistance: IP67
- Rating: 2.9 vs 3.6

Third Reality

Third Reality Smart Presence Sensor R3

$49.99

Buy on Amazon USA

+ Rating: 3.6
- Price: $49.99 vs $25.99
- Warranty: 1 year vs 2 years

Frequently Asked Questions

Which is better overall: Meross Presence Sensor MS605 or Third Reality Smart Presence Sensor R3?

Meross Presence Sensor MS605 has the stronger overall profile in this comparison, especially for price, warranty, and weather resistance.

What is the biggest difference between Meross Presence Sensor MS605 and Third Reality Smart Presence Sensor R3?

Price is one of the clearest differences: Meross Presence Sensor MS605 lists $25.99, while Third Reality Smart Presence Sensor R3 lists $49.99.

Which one looks better on price?

Meross Presence Sensor MS605 is listed at $25.99, while Third Reality Smart Presence Sensor R3 is listed at $49.99. Meross Presence Sensor MS605 (better spec).

Who should buy Meross Presence Sensor MS605?

Choose Meross Presence Sensor MS605 if your priority is price and warranty and that matters more than rating.

Who should buy Third Reality Smart Presence Sensor R3?

Choose Third Reality Smart Presence Sensor R3 if your priority is rating and that matters more than price.

Full comparison table

Compare all 12 Presence Sensors side by side

You are looking at two of them. The full table lines up all Presence Sensors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.