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White rectangular sensor with rounded edges, IP65 rated

eMylo RTH08 Wireless Temperature Humidity Sensor IP65

SKU CH-9BAD-QK1ZB

IP65-rated wireless sensor monitors temperature and humidity from -4 °F to 140 °F with ±0.3 °C accuracy and sends app alerts up to 328 ft away

  • Battery runtime2 AAA batteries
  • Measuring range-4 degrees fahrenheit to 140 degrees fahrenheit
  • Accuracy± 3% RH, ± 0.3 °C/0.54 °F
  • Operating conditions-4 degrees fahrenheit / 140 degrees fahrenheit
  • Storage conditions-4 degrees fahrenheit to 140 degrees fahrenheit
  • Product typeThermometer Gateway, Outdoor Sensor
  • Monitor remotely up to 328 ft with WiFi gateway
  • ±0.3 °C accuracy keeps greenhouse climate precise
  • IP65 rating protects sensor in wet outdoor areas
  • App alerts notify instantly when thresholds are crossed
  • Alexa and Google Assistant enable voice climate checks

Wireless sensor with IP65 rating

The eMylo RTH08 is a wireless temperature and humidity sensor built for indoor and outdoor use. Its IP65-rated enclosure resists dust and water jets, making it suitable for greenhouses, basements, wine cellars and exposed garden areas. The unit operates from two AAA batteries and communicates over RF 433MHz to a separate WiFi gateway. It is designed for users who need remote monitoring in damp or dusty locations without running cables.

Sustained operation in harsh environments

The sensor maintains its stated accuracy of ±0.3 °C and ±3 % RH across the full -4 °F to 140 °F range, so readings stay reliable during long cold snaps or summer heatwaves. RF 433MHz transmission reaches up to 328 ft in open air, allowing the gateway to stay indoors while the sensor remains outside year-round. Battery-powered operation avoids wiring and continues through mains outages, while low-battery alerts in the app prevent silent data gaps.

Replaces standalone hygrometers without connectivity

This device upgrades basic analog or battery-only digital hygrometers that cannot push alerts or log history. The jump is worth it when you need automated notifications, voice queries via Alexa or Google Assistant, or data export for trend analysis. It is not a fit for buyers who want a self-contained display unit, a sensor that works without the WSD023 gateway, or a probe for soil or liquid immersion.

How it compares

Measured against everything we stock in Digital Thermometers & Hygrometers, at today’s prices. Recalculated every night.

Price $21.99
Cheaper than about 57% of the 925 comparable items (median $23.99).

Specifications

Product
Brand nameeMylo
Part numberRTH08
Product typeThermometer Gateway, Outdoor Sensor
Product colorWhite
Performance
Accuracy± 3% RH, ± 0.3 °C/0.54 °F
Power
Battery runtime2 AAA batteries
Environment & compliance
Operating conditions-4 degrees fahrenheit / 140 degrees fahrenheit
Storage conditions-4 degrees fahrenheit to 140 degrees fahrenheit
More details
Measuring range-4 degrees fahrenheit to 140 degrees fahrenheit

Questions about this item

How much power does the WiFi gateway draw while running continuously?

The gateway requires a DC 5V/1A supply via its Type-C port, so it draws up to 5 watts during constant operation.

What separate hardware must I already own before this sensor can send readings to my phone?

You need the eMylo WSD023 WiFi gateway, which connects to your 2.4GHz network and pairs with the sensor over 433MHz RF.

Will the sensor still transmit data if my older 2.4GHz router only supports 802.11b/g?

Yes, the gateway uses 802.11b/g/n on 2.4GHz, so it remains compatible with legacy 2.4GHz routers.

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