We normally deal direct with the main importer WeatherSpares, which is why we pass you onto them to complete your purchase. However we are aware that sometimes Amazon and Others run special deals, so for your convenience, we also check every day to see what is available.  The latest information is below, so just click on the relevant price:

Ecowitt WH45 Indoor 5-in 1 Air Quality Sensor

£120.06 at Aliexpress £145.00 at Weatherspares.co.uk £170.00 at eBay at Amazon.co.uk

Features

• Measures indoor PM2.5, PM10, CO₂ concentration, Temperature and Humidity every 60 seconds when powered by USB or every 10 minutes when powered with batteries.
• USB connection for indoor use only
• CO2 value calibration function available on the device
• PM2.5 value Calibration function available when paired with GW1000 gateway
• When paired with a GW1000 Wi-Fi Gateway:
  • Monitor live sensor data on the Live Data page of the WS View app (requires the gateway and your phone using the same Wi-Fi network)
  • Displays current PM2.5 / PM10 concentration/AQI and 24H AQI and air quality level index on the Live Data page of the WS View app
  • Displays current CO2 concentration and 24H average CO2 concentration on the Live Data page of the WS View app
  • Displays temperature and humidity data where the sensor located
  • Calibration function available for PM2.5 value
• When paired with a Weather Station Console (HP2551/HP3500/HP3501):
  • The PM2.5, PM10 and CO2 data automatically scrolls displaying on the screen every 5 seconds
  • Calibration function available for PM2.5 value
• When uploaded to Ecowitt Weather Server:
  • View current sensor data & history records & graph on the website
  • Set and receive email alerts from the server
  • Remote monitoring with smart phone, laptop, or computer by visiting the website

• Transmission distance in open field: 100m(300 feet)
• Frequency: 868MHz (UK/Europe)
• Sensor reporting interval: 1 minutes (10 minutes when only powered by batteries)
• Power consumption
  • Particle Detection Sensor: AC power (5V 1A) – Not included
  • 2 x AA 1.5V Batteries for back up – Not included