VS Instruments

AP4-Automatlc Porometer

Portable compact battery operated system for measuring Stomata conductance OR Resistance of leaves.

The sensor head contains two fast response micro thermister to measure cup and leaf temperatures, allowing accurate temperature compensation to be applied.

Features:

AP4 has a in-built data storage facility for 1500 data sets and each data set comprising the readings, reading label, time, light level (PAR), temperature and relative humidity have facility to write 30 characters of note from key pad to identify the observation or any particular species


A help button in the instrument itself provides all the operational help to the user in field itself

AP4 is supplied with a modulated polypropylene
calibration plate to calibrate the instrument in the
field itself with in few seconds.

Parameters Measured:
	Stomatal Conductance, Resistanc
	PAR, RH, Temperature

Techinical Specifications :
Conductance	5.0 - 1200 mmol/m2/s
RH	0-100%
Cup temp.	-5 to 55 deg C
PAR Flux	0-2500 Micro mol/m2/s
Measuring units	Conductance :: mmol/m2/s OR mm/s Resistance :: s/cm , s/m, m2 s/mol ( user selectable)

Sensor Head	Cup : Slot 205 x 1705 mm rounded ends
RH Sensor	Vaisala 16663HM
Temp Sensor	High precession 100K thermister
Data storage	1500 data sets with 30 note as exp. Name, variety name
Display	8 lines x 40 character LCD