Best in class - measures Y(II), ETR, Leaf temp, FV/FM, quenching, & it has FM' correction option included.
This instrument provided the most used plant stress measuring protocols, at a much lower price. OS1p capability includes the fast measurements: Y(II) or ΔF/FM', ETR, leaf temperature, and FV/FM. It also provides the Hendrickson lake model quenching protocol to allow NPQ, Y(NPQ), and Y(NO) measurements. Rapid light curves are also included.
The OS1p is designed to provide a cost effective, yet comprehensive plant stress measuring chlorophyll fluorometer. It is optimally designed to measure the light adapted protocol developed by Bernard Genty, ΔFM/FM' or Y(II), the Burke water stress assay, and the dark adapted protocols: FV/FM, Rapid Light Curves (for changing light conditions found under canopy and in aquatic measurements), and basic quenching measurement using the lake model Hendrickson protocol with NPQ, Y(NPQ) and Y(NO).
Parameters Measured and Protocols included:
Quantum Photosynthetic Yield of PSII (or ΔF/FM' or Y(II)).
Electron transport rate (w/optional clip).
Photosynthetically Active Region value (with optional PAR clip).
Leaf temperature (with optional PAR clip).
Maximum Photochemical efficiency of PSII.
A more sensitive detector of stress than FV/FM, but it does not measure plant efficiency.
FMS (or FM'):
Maximal fluorescence with actinic illumination.
FS (or F):
Fluorescence under steady state conditions (prior to saturation pulse).
Multi-Flash with FM' correction and ETR correction.
RLC: Rapid light curves.
A measure of a leaf's photosynthetic MAX capacity or maximum electron transport rate α is the initial slope of line at low PAR values created by relating ETR to PAR. It provides a measure of quantum efficiency.
A measurement of the light intensity where light saturation dominates, or the minimum saturation level.
PAR light intensity at ETRMAX.
Hendrickson lake model quenching protocol:
NPQ, Y(NPQ), Y(NO), Y(II), NPQ, FV/FM.
Optional PAR Clip
Provides PAR and leaf temperature. It should be purchased for Y(II) and ETR measurements. The PAR Clip is also recommended for quenching measurements because it allows the built-in actinic light source to remain at a stable light intensity during longer measurements.
White LED with 690 nm short pass filter. 11,000 μmols.
660 nm LED with 690 nm short pass filter.
Actinic light source:
White LED to 3000 μmols.
Far red light:
Above 740 nm.
Pulse modulation method.
Detector & Filters:
A PIN photodiode with a 700 ~ 750 nm bandpass filter.
Auto-switching from 10 to 10,000 points per second, depending on phase of test.
Automated routine to optimally set the modulated light intensity.
The modulated light may also be set manually.
Multi-Flash FM' correction for all light adapted protocols.
It may be turned on or off.
Adjustable from 0.1 seconds to 12 hours.
1 Gigabyte of non-volitile flash memory, supporting unlimited data sets and traces
USB, SD/MMC 1 Gigabyte data cards.
Graphic color touch screen.
Menu driven software.
Internal 12V, rechargeable nickel metal hydride battery.
8 to 12 hours of continuous operation.
7 in x 5.5 in x 3.25 in.
17.8 cm, x 14 cm, 8.3 cm.
3.6 lbs / 1.62 kgs.
How FM' correction works
How FM' correction works
Protective transport case included
Opti-Sciences, Inc. 8 Winn Avenue Hudson NH 03051 USA (603)883-4400