The devices of the Querx product family

  • monitor temperature, humidity, air pressure and meter readings,
  • send alert notifications if threshold values are transgressed,
  • fully document all tracked data,
  • visualize data in interactive graphs,
  • provide all data via LAN, WiFi and cloud services,
  • can export data in various formats,
  • can be integrated into existing monitoring systems.

Two criteria play a major role when choosing the appropriate sensor: The measurand and the network connection.

Selection Criteria

Measurand

If you only need to measure temperatures and a network cable is available at the point of use, Querx PT is the best choice. You will, however, require an additional Pt100 or Pt1000 sensor.

 

Since the market offers a wide range of such sensors, a suitable device can be found for almost any application. These sensors excel when it comes to accuracy and long term consistency.

 

Querx TH might be an interesting option, due to its price point, even if the additional humidity sensor is not required. The device is slightly cheaper and the temperature and humidity sensor is already integrated. Querx THP is the obvious choice if the air pressure needs to be measured in addition to temperature and humidity.

 

Querx CN is kind of the odd one out, as it does not strictly measure values, but counts events within a customizable time frame. The device is primarily used as an energy meter.

Network connection

The corresponding WLAN version is the best choice if no Ethernet cable is available where the device is installed.

 

These devices are considerably more powerful. In addition to their wireless connectivity, they also feature TLS/SSL encryption for the web interface and can log data for a substantially longer timeframe.

 

Future firmware updates may only be available for Querx WLAN. Therefore, the WLAN variant might be preferable, even if it is connected via Ethernet.

Selection Table

Which web sensor best serves your needs? Make an informed choice!
 Querx THQuerx THPQuerx PTQuerx CNQuerx WLAN THQuerx WLAN THPQuerx WLAN PT

Sensors

Temperature-40 to 185 °F
(-40 to 85 °C)
-40 to 185 °F
(-40 to 85 °C)
-328 to 1382 °F
(-200 to 750 °C)
-40 to 185 °F
(-40 to 85 °C)
-40 to 185 °F
(-40 to 85 °C)
-328 to 1382 °F
(-200 to 750 °C)
Humidity0 to 95 % RH0 to 95 % RH0 to 95 % RH0 to 95 % RH
Pressure300 to 1100 hPa300 to 1100 hPa
Contact inputs2
Memory capacity
(min.)
51 days25 days51 days51 days7.5 years3.8 years7.5 years
Accuracymediummediumhighhighmediummediumhigh
Max. cable length0.3 m fixed0.3 m fixed> 100 m> 100 m0.3 m fixed0.3 m fixed> 100 m

Network

Cable10/100 BaseT10/100 BaseT10/100 BaseT10/100 BaseT10/100 BaseT10/100 BaseT10/100 BaseT
Wireless802.11b/g/n802.11b/g/n802.11b/g/n
SecurityEmailEmailEmailEmailEmail, HTTPSEmail, HTTPSEmail, HTTPS

Miscellaneous

Power consumption1 W1 W1 W1 W1.5 W1.5 W1.5 W
SignallerLEDLEDLEDLEDLED, beeperLED, beeperLED, beeper
Casing dimensions2.2 x 1.6 x 0.8 in
(56 x 40 x 20 mm)
2.2 x 1.6 x 0.8 in
(56 x 40 x 20 mm)
2.2 x 1.6 x 0.8 in
(56 x 40 x 20 mm)
2.2 x 1.6 x 0.8 in
(56 x 40 x 20 mm)
2.6 x 2 x 0.8 in
(66 x 50 x 20 mm)
2.6 x 2 x 0.8 in
(66 x 50 x 20 mm)
2.6 x 2 x 0.8 in
(66 x 50 x 20 mm)
Price from140,00 € net160,00 € net 155,00 € net235,00 € net255,00 € net250,00 € net

Links

Product Pages

A demo version, technical data, prices and more can be found on the respective product page.

Querx TH
Querx THP
Querx PT
Querx WLAN TH
Querx WLAN THP
Querx WLAN PT

Related Links

Relevant information for all web sensors

Querx Firmware