www.label.pl | LAB-EL Elektronika Laboratoryjna
Laboratory Electronics

for meteorological cage LB-719

  • functions: thermometer, hygrometer (humidity meter)
  • measurement: temperature, air relative humidity
  • wide scope of work temperatures 
  • two cable connection 
  • digital result transmission to long distances
  • cylinder casing adapted to be assembled in a meteorological cage
Meteorological cage LB-719 with LB-710R


Termometer hygrometer LB-710R

Thermometer - hygrometer LB-710R is designed (after being placed in an additional casing - a meteorological cage LB-719) for air temperature and relative humidity measurement in the open space i. e. in a meteorological station. Thermometer - hygrometer can work in places where there is high humidity and great dustiness, since it has a hermetic casing, a teflon filter (anti pollution filter type F4) protecting the humidity sensor and because the electronic part is placed in a silicone filling compound.

Thermometer - hygrometer LB-710R is a stationary device, of small size, powered from an outside power supply. For measurement the device uses data from the temperature sensor Pt-1000 as well as from the capacitive relative humidity sensor. Basing on the knowledge of nonlinear sensor characteristics and digital calibration data stored during the calibration process in a device's memory - the microprocessor (built-in the device) counts the actual relative humidity and temperature measurement results. Those results are sent (in a digital form) from the device to a supervisory system of data collection.

The device is equipped with a digital current interface and its time course is analogous to a standard RS232C. Such interface beside data transmission is used for powering the hytherograph - using two-cable connection for this purpose where the polarity of attaching the interface's cables is optional. The device can be attached to any supervisory system i.e.: climate regulator LB-722, concentrator LB-731, panel LB-755, converter LB-486 or (using a converter LB-371) to an interface RS232C of any computer. It allows on remote control and automatic measurement data collection. It is possible for the humidity measurement results to be displayed using an additional PC program (which is included in a standard LAB-EL equipment) using such values as: dew point temperature (in °C), humidity content (g/kg) or absolute humidity (kg/m3). The device's interface output in a version LB-710R is provided by a disconnectable cable and its standard length amounts to 5m (different lengths require clients specification when ordering).

The device does not have any mechanical calibration elements (i.e.: potentiometers). The calibration of the device is performed by sending calibration data obtained in the model climate conditions through a digital interface to the device's non-volatile memory. It guarantees comfort and high calibration accuracy as well as stability of the device's meteorological parameters in time.

Each thermometer - hygrometer LB-710R (upon a request) can have an individual calibration certificate issued by the LAB-EL Calibration Laboratory.

Thermometer - hygrometer LB-710 received the certification type RP T 95 77 issued by the President of Central Measurement Office in Warsaw.

Technical data

Measurement inaccuracy
+/- 0.1°C, +/- 1 last digit
Scope of measurement -40..+85°C
Measurement inaccuracy
+/- 2.0% in the scope of 10...90%, +/- 1 last digit
+/- 4.0% outside of the scope 10...90%
Scope of measurement 0..100% for temperatures up to +60°C
0..70% for temperatures up to +70°C
0..40% for temperatures up to +85°C
Scope of readings Resolution
Air temperature
-40.0..+85.0°C 0.1°C, optionally 0.01°C
Relative humidity 0.0..100.0% 0.1%
Scope of voltage
8..24V DC  
Energy consumption
15mA average
25mA maximum
Type Material Overall dimensions [mm] Level of casing protection
LB-710R ABS/PTFE 200 x 25 (cylindrical ) IP 65
LB-719 ABS resistant to UV radiation, biały, white
external diameter: 210 mm, size: 205 mm, internal diameter: 79 mm IP 65


Transmission parameters: time in accordance with RS232C, 300 bps, 7 information bits, without the evenness control, 1 stop bit working in a standard of a digital current loop.


Optional cage equipment:
  • handle: an extension arm to be fastened to a mast (pipes 45 mm in diameter), cage's distance from the mast - typically 380 mm (or according to a client's request).
Ocena produktu
Thermometer hygrometer LB-710R is designed (after being placed in a meteorological cage LB-719) for air temperature and relative humidity measurement
Ocena: 5/5, liczba głosów: 14
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