Item No: 8120-00


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Product Description

Lufft offers a variety of models with internal or external sensors for recording humidity, temperature, pressure and CO2.

The 8120-00 (THI) Model records Temperature and Relative Humidity.

For climate monitoring and recording in buildings, air conditioning units, laboratory, cleanroom, storerooms and museums, alarm indication (current or historical since the last data transmission), conversion of the display from %RH to absolute humidity or dewpoint with SmartGraph professional software.

  • Economically priced 
  • SmartGraph 3 software, connecting cable and manual— everything needed to record and download 
  • NIST Certification and anti-theft wall-mounting device optional 
  • POE (power over ethernet), USB, RS232 options 

Lufft IBOX webinar, Create an alert E-mail from your Opus 20 to your smartphone! Link here.

Specifications and additional product information
OPUS 20 temperature/
rel. humidity
OPUS 20 temperature/
rel. humidity POE
Dimensions 6½" x 3" x 1¼" (166mm x 78mm x 32mm)
Measuring interval 10/30s, 1/10/12/15/30min, 1/3/6/12/24h
Construction Plastic housing
Operating time with battery > 1 year
Data storage 16 MB, 3,200,000 measured values
LC-Display 3½" x 2½" (90 x 64mm)
Weight 8 oz. (250g)
Included in delivery PC-Windows™- Software SmartGraph 3 for graphic
and numerical representation of measured
values / instruction manual/ data cable/ battery
Interface USB, LAN
Storage rate 1/10/12/15/30min, 1/3/6/12/24h
Power supply 4 x LRG AA Mignon, USB, (POE opt.)
Operating temperature -4 to 144°F (-20...50°C)
Principle NTC
Measuring range -4 to 144°F (-20...50°C)
Accuracy ±0.3°C (0...40°C), otherwise 0.5°C
Resolution 0.1°C
Relative humidity
Principle capacitive
Measuring range 10..95% RH
Accuracy ±2% RH
Resolution 0.5% RH