JUNIOR-PAM Chlorophyll Fluorometer

Two different types of leaf-clips are provided, a 60° clip for measurements in ambient light and a magnetic leaf clip for Fo-Fm and Fv/Fm measurements.

Specifications

Optoelectronic Unit JUNIOR-PAM
(BLUE Version)
Modulated fluorescence excitation: Blue LED (wavelength of maximum emission: 445 nm). Modulation frequencies 5 to 25 Hz adjustable in increments of 5 Hz, and 100 Hz. Fluorescence at wavelengths greater than 630 nm is measured

Actinic light: Same LED as used for modulated light. PAR at 1 mm distance from the tip of the 50 cm JUNIOR-PAM light guide: 25 to 1500 μmol m-2 s-1. Maximum PAR of saturation pulses, 10 000 μmol m-2 s-1

Optoelectronic Unit JUNIOR-PAM/W
(WHITE Version)

Modulated fluorescence excitation: White LED (wavelengths of maximum emission: 445 and 545 nm). Modulation frequencies 5 to 25 Hz adjustable in increments of 5 Hz, and 100 Hz. Fluorescence at wavelengths greater than 650 nm is measured

Actinic light: Same LED as used for modulated light. PAR at 1 mm distance from the tip of the 50 cm JUNIOR-PAM light guide: between 25 and 1500 μmol m-2 s-1. Maximum PAR of saturation pulses, 10 000 µmol m-2 s-1

Optoelectronic Unit JUNIOR-PAM
and JUNIOR-PAM/W

Housing: Aluminum housing with USB type B socket, M8 4-pole socket to connect the JUNIOR-PAM monitoring leaf clip (accessory), port for JUNIOR-PAM light guide, and swivel-mounted sample support

Far-red light: LED with 745 nm maximum emission wavelength for selective excitation of photosystem I

Fluorescence detection: PIN photodiode protected by long-pass filter. Selective window amplifier to measure pulse-amplitude modulated (PAM) fluorescence

Communication: Standard USB communication via 1.2 m USB-cable type A-B

Power supply: 5 V DC supplied by the USB-cable type A-B used for communication

Power consumption: 100 mW at normal operation and 500 mW during saturation pulse

Dimensions: 11.5 cm x 6.5 cm x 3 cm (L x W x H)

Weight: 200 g

Operating temperature: 0 to + 40 °C

Operating humidity range: 35 to 85% RH (to avoid condensation)

Software WinControl-3

Program: WinControl-3 System Control and Data Acquisition Program (Microsoft Windows XP/Vista/7/8/10) for operation of measuring system via PC, data acquisition and analysis

Saturation Pulse Analysis: Measured: Ft, F0, FM, F, F0’ (also calculated), FM’. PAR, leaf temperature and relative humidity using Monitoring Leaf-Clip JUNIOR-BD. Calculated: F0’ (also measured), FV/FM and Y(II) (maximum and effective photochemical yield of PS II, respectively), qL, qP, qN, NPQ, Y(NPQ), Y(NO) and ETR (electron transport rate)

Fitting Routines: Two routines for determination of the cardinal points α, Ik and ETRmax of light curves

Programmability: Fully programmable using batch file language

Computer Requirements: 1 free USB socket. Processor, 1 GHz. RAM, 512 MB. Screen resolution, 1024 x 600 pixels. Interface, USB 2.0/3.0