WiFi Thermometer, Hygrometer and Data Logger

Querx WLAN TH is a thermo-hygrometer that can be accessed via Ethernet LAN or WiFi.

The smart sensor features an integrated data logger, alert functions and several interfaces that allow for manual or automated data access.

The device is controlled and configured via a graphical web interface and can operate autonomously.

Querx WLAN TH supports various cloud services. This makes all data accessible globally at any time, via web, apps and APIs.

egnite - Querx WLAN TH - WiFi Thermometer, Hygrometer and Data Logger
Dew point
egnite - Querx Smart WLAN Sensor
Interactive Data Visualization

The web interface displays all tracked measurements in an interactive graph. The latest standards such as HTML5, CSS3 and SVG facilitate access to the interface via your PC, tablet or smartphone.

System Monitoring

Querx WLAN TH provides access to data via M2M-interfaces. SNMP support lets you integrate the sensor into network management systems such as Zabbix or Icinga. The device can also be applied in the industrial sector via SCADA systems, due to the integrated Modbus/TCP interface.

Data Export in Several Formats

Recorded measurements can be exported for further external processing and archiving. The CSV format is compatible with spreadsheet applications such as Excel. The XML format makes it possible to process data automatically in customized software solutions.

Encrypted Data Access

Querx WLAN TH can encrypt the web interface and any data that is accessed via the HTTP interface. The device can thus be securely used in public wireless networks.

WiFi interface

Querx WLAN TH tracks temperature and humidity measurements and calculates the dew-point. The data is accessible via WiFi, making the device usable in locations without access to a wired network.

Cloud Connectivity

If required, all data can be transmitted to the Internet of Things services ThingSpeak and Xively. This lets you access your data globally and facilitates the integration into custom software systems via the interfaces provided by the cloud services.

Various Alerts

Querx WLAN TH can send emails, SNMP traps and Syslog messages to notify you if
-the temperature, humidity or dew point rises above or falls below configurable limits
-the temperature, humidity or dew point values rise or fall exceptionally quickly
-the values return to their normal range

Data Access via HTTP

All current and logged values can be retrieved in the XML, JSON and CSV file formats. This makes them accessible from the command bar and via Python, PHP or other programming languages.

Always up to Date

The Querx firmware is in continuous development and new functionality is frequently added. New versions are uploaded to the web periodically. You can determine which version your device is running and initiate an update right from the web interface.

Continuous Data Logging

The smart sensor saves the measured values once a minute. The minimum, maximum and average values are saved with a timestamp for at least 7.5 years and will not be lost, even if a power shortage occurs.

Mobile Apps

The Android and iOS apps Querx Discoverer and IoT Monitor give you access to all your recorded data from your smartphone.

Encrypted Email Alerts

Querx WLAN TH can notify up to four recipients of occurring alerts using two discrete email accounts. This ensures that alert notifications are sent even if one server fails.
The emails are encrypted (TLS / StartTLS).
The messages can be customized with text-variables, making them easily comprehensible.

Intuitive Operation via Web-Interface

Configuring and operating Querx WLAN TH is an intuitive process. The user interface is self-explanatory and a detailed online help section is also provided.

Quick Setup

Querx WLAN TH can be integrated into existing networks without any configuration being required. The smart sensor can be detected automatically by mDNS / Bonjour and it can be configured automatically via DHCP.

High-grade Sensors

Querx WLAN TH features integrated temperature- and humidity-sensors. The sensors are oil repellent as well as splash- and dust-proof.

Easy Installation

The case's small footprint makes it possible to install the sensor in confined spaces.
It can be fastened easily by using the slits on the casing.

Accredited Calibration Available

Calibration is an integral part of quality control. DAkkS-certification (German Accreditation Body) is available for Querx devices for a service-fee and can be purchased when ordering the product or at a later date.

Low Power Consumption

Querx WLAN TH is very efficient. The power consumption is approximately 1W.

Extended Temperature Range

Querx WLAN TH works reliably even in unfavourable conditions. The device can operate at temperatures between -40 °F and 185 °F (-40 °C - 85 °C).

Power Supply via USB

An unused USB port or an external power supply can be used to power Querx WLAN TH.

Querx WLAN TH Specifications

Temperature Sensor
Measurement range-40 to 185 °F
(-40 to 85 °C)
±0.7 °F at 14 to 185 °F
±1.8 °F at -40 to 14 °F
(±0.4 °C at -10 to 85 °C)
(±1.0 °C at -40 to -10 °C)
Resolution0.1 °F
(0.1 °C)
Long term stabilityTyp. 0.018 °F
(0.01 °C)
per year
Humidity Sensor
Measurement range0 to 95 % RH
Accuracy±3 % RH at 20 to 80 % RH and 30 °C (86 °F)
Typ. ±1 % RH hysteresis
Resolution1 % RH
Long term stabilityTyp. 0.25 % per year
Sensor typeCMOS IC with polymide film
Hardware and Interfaces
CalibrationDAkkS certificate optionally available
Ethernet10/100 Mbit RJ45, HP Auto-MDIX, static or dynamic IP (DHCP client)
WiFI2.4 GHz IEEE 802.11 b/g/n
WiFi securityWEP, WPA, WPA2
SystemNut/OS 5
Firmware updatesVia web interface, recovery feature
Sampling rate1 second
Logging intervalCustomizable
Memory capacity4 million entries, ≙ 7.5 years (1 entry / min) to 350 years (1 entry / h)
M2M interfacesHTTP/S (XML, CSV, JSON), Syslog, Modbus/TCP, SNMP
Web interfaceInteractive diagram, live update, HTML5, CSS3, XML and CSV export
SecurityStartTLS / TLS, HTTPS, password protection,
user management (3 users / 3 groups)

EmailUp to 4 recipients and 2 SMTP servers
SNMPSNMPv1 agent and traps
SignallerRGB LED, beeper
Time / DateReal-time clock with battery backup and SNTP update
Supply voltage5 to 5.5 V DC via micro-USB
Power consumptionTyp. 200 mA, 1 W
Max. 300 mA, 1.5 W
Ambient Conditions
Operation-40 to 185 °F, max. 95 % RH
(-40 to 85 °C, max. 95 % rF)
Storage-40 to 185 °F, max. 95 % RH
(-40 to 85 °C, max. 95 % rF)
Casing materialABS plastic, black, RAL 9011
Casing dimensions2.6 x 2 x 0.8 in
(66 x 50 x 20 mm)
Sensor cable13.4 in
(340 mm)
Weight0.2 lb
(63 g)
Connectors RJ45 (Ethernet), micro-USB
InstallationWall mounting
Interference immunityEN 61326-1:2013 class A
EN 61000-4-2:2009
EN 61000-4-3:2011
EN 61000-4-4:2013
EN 61000-4-6:2009
EN 61000-4-8:2010
Emitted interferenceEN 61326-1:2013 class B
EN 55011:2011
ETSIEN 300 328, Ver. 1.8.1
EN 301.489 - 17
Flammability ratingUL94V-0
Protection classIP20
RoHS standardEU Directive 2011/65/EU
ConformityCE conform

Click here to access tutorials, current firmware versions amongst other things.
Querx Accessories
Accessories for special tasks and spare parts.
Querx sensors can be ordered from our international business partners.

Querx WLAN TH Order Details

  • Querx WLAN TH
    Querx WLAN TH with integrated sensors
    Product number EGN601215
  • Querx WLAN TH Set
    Querx WLAN TH with integrated sensors + Ethernet cable, Micro-USB cable, USB power adapter (GB, EU, US or AU), documentation on CD
    Product number EGN601115