GS301 LoRaWAN Bathroom Odor Detector

Bathroom Odor Detector

Bathroom Odor Detector

Less Nasty Air. More Attentive Care.

  • Detect NH3 & H2S with Higher Accuracy
  • Wireless Deployment with up to 3 Years Battery Life
  • Support LoRaWAN® & Milesight D2D Simultaneously
  • Built-in Buzzer & Traffic Light Indicator for Alarming


Minimalist & Practical Design


Minimalist & Practical Design

GS301 LoRaWAN® Bathroom Odor Detector is compact in size and easy to install and maintain. With damp proof coating, the detector can work on various conditions of bathrooms.



 GS301 LoRaWAN Bathroom Odor Detector

4-in-1 Sensors with

Integrated with ammonia (NH3), hydrogen sulfide (H2S), temperature and humidity sensors.
Detect ammonia (NH3) and hydrogen sulfide (H2S) gas according to electrochemical principle.

  • NH3: ±5% Accuracy
  • H2S: ±5% Accuracy

* It is highly recommended that sensors operate below 35°C.

 GS301 LoRaWAN Bathroom Odor Detector

Stay Informed of Foul Air

When ammonia or hydrogen sulfide concentration reaches thresholds, the alarm will be activated, including traffic lights indicator, built-in buzzer and uplink data packets. *Thresholds can be customized


 GS301 LoRaWAN Bathroom Odor Detector


Assistant to Ventilator
for Clearer Air

HVAC system is empowered to automatically adjust based on the detected concentrations of ammonia and hydrogen sulfide produced from the urinal and sewer pipe.


 GS301 LoRaWAN Bathroom Odor Detector


Milesight D2D
Featuring LoRa®

Support Milesight D2D protocol to enable ultra-low latency and direct ventilation control without gateways.

  • Lower Latency
  • Less than 1 Second Response Time
  • Secure Transmission
  • Reduce Investment Cost

*When Milesight D2D is enabled, LoRaWAN® protocol can operate as usual.

GS301 LoRaWAN Bathroom Odor Detector GS301 LoRaWAN Bathroom Odor Detector


Multi-Year Battery Operation

GS301 has a battery life of up to 3 years

* Sensor Life can be over 3 Years
**4 x 4000 mAh ER18505 Li-SOCl2 Replaceable Batteries (10 min intervals)




LoRaWAN® Based

  • Compatible with Standard LoRaWAN® Gateway
  • Penetrate Thick Wall
  • 2 km Communication Range in Urban Areas




Compliant with
Milesight IoT Cloud

  • Monitoring ambience conditions at any time anywhere
  • Interactive collaboration with Milesight IoT sensors to realize scene-based automation
  • Android & iOS versions allow you to manage devices at your fingertips


Easy Configuration

Switching on/off and configuring the device via NFC technology from mobile phone or PC

LoRaWAN® Gas Detector GS301 LoRaWAN Bathroom Odor Detector LoRaWAN® Gas Detector
1st Step
Install the Milesihgt ToolBox
2nd Step
Enable NFC and run ToolBox,
then attach your phone to the device
3rd Step
Verify the password
and start configuring

Flexible Installation

GS301 LoRaWAN Bathroom Odor Detector

Installation Steps

GS301 LoRaWAN Bathroom Odor Detector

Installation Steps



Wireless Transmission Protocol LoRaWAN® , Milesight D2D
Frequency CN470/IN865/RU864/EU868/US915/AU915/KR920/AS923-1&2&3&4
Tx Power 16 dBm (868 MHz)/19 dBm (470 MHz)/22 dBm (915 MHz)
Sensitivity -137dBm
Mode OTAA/ABP Class A
Ammonia (NH3) Detection Principle Solid Polymer Electrochemical
Range 0 ~ 10 ppm
Accuracy ± 5% (-40 – 35°C)
Long-term Stability < 1 % accuracy drift per month
Resolution 0.01 ppm
Hydrogen Sulfide (H2S) Detection Principle Solid Polymer Electrochemical
Range 0 ~ 5 ppm
Accuracy ± 5% (-40 – 35°C)
Long-term Stability < 1 % accuracy drift per month
Resolution 0.01 ppm
Temperature Range -40 – 85°C
Accuracy ± 0.2°C
Resolution 0.01°C
Humidity Range 0 – 100%RH
Accuracy ± 2%
Resolution 0.5%RH
Others LED& Buzzer 1 × Status/Alarm Indicator + 1 × Buzzer
Button 1 × Reset/Reboot Button
Configuration Mobile App via NFC
Advanced Feature Milesight D2D Controller
Physical Characteristics Power Supply 4 x 4000 mAh ER18505 Li-SOCl2 Replaceable Batteries
Sensor Life > 3 Years
Battery Life Around 3 Years (10 min interval)
Operating Temperature -40°C – 55°C
Relative Humidity 0% – 95% (non-condensing)
Ingress Protection IP30
Dimension 120 × 85 × 32.5 mm (4.72 × 3.35 × 1.28 in)
Material & Color PC+ABS (Flame Retardant), White
Installation Wall Mounting