JUNIOR-PAM

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

Same LED as used for modulated light. Actinic PAR, 25 to 1500 μmol μmol m-2 s-1; maximum PAR of saturation pulses, 7000 μmol m-2 s-1. All data valid for 1 mm distance from the tip of the 50 cm JUNIOR-PAM light guide

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

LED with 745 nm maximum emission wavelength for selective excitation of photosystem I

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

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

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

100 mW at normal operation and 500 mW during saturation pulse

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

200 g

0 to + 40 °C

35 to 85% RH (to avoid condensation)

WinControl-3 System Control and Data Acquisition Program (Microsoft Windows 10 and 11) for operation of measuring system via PC, data acquisition and analysis. Not compatible with Windows 10 on ARM

Measured: F_t, F₀, F_M, F, F₀’ (also calculated), F_M’. Depending on the leaf clip connected, the software can record PAR, temperature and also humidity. [In the case of the MINI-PAM-II clip humidity can be measured, which the clip of the JUNIOR-PAM cannot.]
Calculated: F₀’ (also measured), F_V/F_M 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)

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

Automatic determination of signal offset for all light intensities and gain levels. Automatic calibration of internal PAR sensor against an external PAR sensor connected to the instrument

Processor: 0.8 GHz, RAM: 512 MB, screen resolution: 1024 x 600 pixels, interface: USB 2.0/3.0

USB

50 cm x 1.5 mm (length x diameter) plastic fiber

Open leaf clip (angle between incident radiation from JUNIOR-PAM and leaf surface, 60°) and magnetic leaf clip (angle between incident radiation from JUNIOR-PAM and leaf surface, 90°)

3 cm x 2 cm fluorescence foil

Set for fiber tips including various polishing pads

A-B USB cable

Including latest WinControl-3 software

Grey plastic box with handle. Interior: convoluted foam padding. Dimensions: 29 cm x 25 cm x 6 cm (L x W x H). Weight: 510 g

Padded plastic case with handle

25 cm x 29 cm x 5 cm (L x W x H)

680 g

Selective PAR measurement, 0 to 2500 μmol m-2 s-1 PAR

: Ni-CrNi, -20 to +60 °C

-20 to +60 °C

JUNIOR-PAM special socket

100 cm

13 cm x 2.5 cm (max.) x 5.5 cm (max.) (L x W x H)

162 g (including cable)