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header-product Indoor/outdoor temperature and humidity sensor Milesight EM300TH915M freestanding, 4000 mAh battery, up to 5 years

Indoor/outdoor temperature and humidity sensor Milesight EM300TH915M freestanding, 4000 mAh battery, up to 5 years

Milesight EM300TH915M temperature & humidity sensor Photo 1
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Short description

Milesight EM300TH915M is a freestanding indoor/outdoor temperature and humidity sensor designed for environmental monitoring. It measures ambient temperature and relative humidity, runs on a 4000 mAh battery with up to 5 years battery life, and has compact dimensions (88 × 87 × 27 mm). Suitable for building monitoring, HVAC checks, storage areas and smart home integration.
Warranty: 2 Years
SKU: 10457263
Manufacturer: Milesight
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Product information

Description

Milesight EM300TH915M is a freestanding indoor/outdoor temperature and humidity sensor for environmental monitoring. The compact device (88 × 87 × 27 mm) measures ambient temperature and relative humidity using a high-sensitivity Sensirion sensor, offers IP67-rated protection, local data storage for historical records, and operates on a 4000 mAh battery designed to last up to 5 years under typical conditions. It supports reliable wireless communication with retransmission capability and can be configured or powered on/off via NFC from a mobile phone or PC.

Advantages

The sensor delivers high measurement accuracy — approximately ±0.3 °C for temperature and ±3% RH for humidity — suitable for precise environmental monitoring. IP67 waterproofing allows use in exposed indoor or sheltered outdoor locations. Built-in storage retains up to 2800 historical records that cannot be manually deleted, supporting traceability and auditability. Retransmission support improves data delivery reliability when network interruptions occur, and the long-life 4000 mAh battery reduces maintenance frequency. NFC-based configuration simplifies setup and operation without the need to open the enclosure.

Suitable for

  • Building and facility environmental monitoring
  • HVAC performance checks and control verification
  • Storage rooms, warehouses and archives where temperature and humidity must be recorded
  • Smart home and IoT integrations requiring compact, battery-powered sensors
  • Temporary outdoor installations in sheltered locations due to IP67 enclosure

Key specifications

  • Measured parameters: ambient temperature and relative humidity
  • Temperature range: -30 °C to 70 °C
  • Humidity range: 0% to 100% RH
  • Temperature accuracy: approximately ±0.3 °C (Sensirion sensor)
  • Humidity accuracy: approximately ±3% RH
  • Enclosure protection: IP67
  • Battery: 4000 mAh, up to 5 years typical battery life
  • Local data storage: up to 2800 historical records (non-manually deletable)
  • Configuration and control: NFC from mobile phone or PC
  • Mounting: freestanding form factor; compact dimensions 88 × 87 × 27 mm
  • Communication: supports retransmission for reliable data delivery

How to use

Place the Milesight EM300TH915M on a stable surface or in a sheltered outdoor location where the sensor is exposed to representative ambient air. Use NFC on a compatible mobile phone or PC to switch the device on and configure measurement intervals, thresholds and network parameters according to your monitoring needs. Ensure the sensor is positioned away from direct heat sources, vents and reflective surfaces to avoid biased readings. If wall or bracket mounting is required, use appropriate hardware while maintaining the device orientation recommended in the installation guide.

Usage recommendations

For accurate and long-term performance, store the sensor where airflow is representative of the monitored space, perform periodic checks against a calibrated reference if regulatory accuracy is required, and replace the 4000 mAh battery before end-of-life to avoid gaps in data collection. Use the device’s local storage and retransmission features to preserve records when network connectivity is intermittent.

Specifications

Type:
Freestanding
All features
Sensor type:
Temperature & humidity sensor
Purpose:
Indoor/outdoor
Standard interfaces:
NFC
Protection features:
Waterproof
Temperature measuring range:
-30 - 70
Humidity measuring range:
0 - 100
Battery life (max):
5 year(s)

Features

Type:
Freestanding
International Protection (IP) code: Device protection rating against dust and water according to the international IP standard.
IP67

Battery

Battery capacity:
4000 mAh

Weight & dimensions

Height:
27 mm
Width:
88 mm
Depth:
87 mm

Operational conditions

Operating temperature (T-T):
-30 - 70

Description

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Customer questions

FAQ

What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All Milesight products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Milesight service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: type, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.
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14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
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Secure Payment Pay the way you prefer: cash, VISA, MasterCard, Apple Pay, Google Pay, bank transfer, or 0% installment plan.
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Quality Since 2008 AiO.lv has been on the market for over 18 years and has earned trust — with more than 6000 genuine positive reviews on Google.