Light, UV and temperature transmitters

These transmitters are designed for users who need to monitor temperature, humidity and visible light or visible and ultra violet light.



Built-in Littlemore Scientific light sensor (Visible and UV), RH and temperature.



GD72E with LS50


GD72E with LS70

As all sensors are on leads, the combination is ideal for all environments and in particular display cases, so that only the light sensor and tip (top 10mm) of the RHT10E probe need be visible.

The LS50 ('Light puck') and LS70 modules utilise the museum and conservation industry preferred Elsec – Littlemore light / light and UV sensors. The GD72E transmitter interfaces with all sensors at digital level so that no system accuracy is lost. When used with Darca Heritage software both instantaneous and cumulative light and UV values can be provided

The LS50 light only module, LS70 light/UV module, and the RHT10E must be ordered separately.

Sensors - order separately


WBG Wall bracket docking kit

This kit enables fitment of the transmitter's built-in wall bracket to difficult or uneven surfaces. The kit provides additional docking security.

The following products are supported:

  • All GD, GC, GL and GS series transmitters
  • RP250GD repeater and RC250 receiver


Transmitter Specification

Model(s) Sensors Range Resolution Accuracy
GL-70 built-in temperature

built-in RH
-30 to 65°C


±0.4°C (+5 to +40°C)
±1.0°C (-20 to +65°C)
±1.5°C (-30°C)
±2% (10 to 90%RH)
±4% (0 to 100%RH)
1 x visible light 0-4,000 Lux
0-200 KLux
1 x UV light 0-5000 mW/m²
0-10,000 µW/Lumen
GD72E external RH (RHT10E)

external temperature (RHT10E)

-40 to +120°C

±2% (10 to 90%RH)
±4% (0 to 100%RH)
±0.4°C (+5 to +40°C)
±1.0°C (-20 to +80°C)
  1 x visible light (LS50 and LS70) as GL-70
  1 x UV light (LS70 only) as GL-70

LS50 light puck

Dimensions: 33mm diameter x 8 mm height
Lead length: 2m


Dimensions: 73 x 50 x 30mm.
Lead length: 2m

Common GenII Transmitter Specification

RF specification: EN300-220
RF power: 10mW
Environment specification  
  Compliant to EN300-220: -10 to +55°C
  Actual: -30 to +65°C
  Humidity: 100% non condensing
Environmental rating: IP40
Dimensions (footprint): 78 x 41mm
Transmission interval range: 1 sec to 4 hours
Indicator (red LED): transmit active/on/off
Control switch (concealed): test mode / hibernate
Antenna socket: SMA


Common to all transmitters

Gen II Quick Start Instructions

Specific to this family of transmitters

GD72E transmitter datasheet