Instruction Manual
IN-E-HyLab-V4_11 
Rotronic AG 
Bassersdorf, Switzerland 
Document code  Unit 
Instruction Manual
Document Type 
HygroLab bench top indicator version 4: 
instruction manual 
Document title 
Page  30 of 51 
© 2006; Rotronic AG  IN-E-HyLab-V4_11 
11  Specifications 
Power supply  AC Adapter 12 VDC regulated, 
100 or 300 mA 
1)
DC(+) Tip 
Operating limits at electronics  0…99 %RH (non condensing) 
 -10...55°C (14...131°F) 
Measured parameters 
2)
  relative humidity    indication range  0.0…100.0 %RH 
 temperature
indication range
-99.9…999.9 °C or °F
 barometric pressure 
3)
 indication range
0.000…9999 hPa / PSI / In Hg 
Calculated parameters 
2) 4)
  dew / frost point 
5)
 indication range -99.9…999.9 °C / °F 
  wet bulb temperature 
6)
 indication range 0.0…100.0 °C / 32.0…212.0 °F 
 enthalpy
 6)
  indication range  -99.9…9999 J/g or BTU/lb 
  vapor concentration  indication range  0.000…9999 g/m3 or gr/cuft 
 specific Humidity 
6)
  indication range  0.000…9999 g/kg or gr/lb 
 mixing ratio 
6)
  indication range  0.000…9999 g/kg or gr/lb 
  vapor concentration at saturation  indication range  0.000…9999 g/m3 or gr/cuft 
  part. pressure of water vapor  indication range  0.000…9999 hPa / PSI / In Hg 
  sat. pressure of water vapor  indication range  0.000…9999 hPa / PSI / In Hg 
Number of probe inputs  HygroLab 1  2 
 HygroLab 2+3 4 
Probe type 
7)
    All models  ROTRONIC HygroClip digital probe 
  All models  ROTRONIC analog probe 
8)
  HygroLab 2+3  Third-party analog probe 
8)
A/D resolution (analog probes)  HygroLab 1+2  10-bit 
A/D resolution (analog probes)  HygroLab 3  12-bit 
Display    Alphanumerical LC display 
Serial output (except HygroLab 1)  RS 232 / RS485 
9)
Optional Ethernet interface  HygroLab 2+3  TCP/IP 
Housing material    Aluminum 
Housing dimensions  220 x 170 x 55 mm (8.66 x 6.69 x 2.16”) 
Weight  1.0 kg (2.2 lb) 
1)  HygroLab with optional Ethernet module requires : AC Adapter 12 VDC, 300 mA 
2)  Specify engineering units when ordering (can be changed by user with the optional HW4 software). See 
separate probe specifications regarding the different range limits 
3)  Not available with HygroLab 1 
4)  Not available with HygroLab 1. The accuracy of the computed parameter is limited by the accuracy of the 
measured parameters on which it is based 
5)  The standard factory setting is frost point for values below freezing. This setting can be changed to dew 
point with the optional HW4 software 
6)  A fixed pressure value is used for the computations of this parameter. The fixed pressure value can be 
changed by the user either from the keypad or with the optional HW4 software. The HygroLab 2 and 3 can 
also be configured with the HW4 software to accept the input from a pressure probe (variable pressure 
value) 










