Chlorophyll Meter

Product Description

Chlorophyll Meter

The chlorophyll meter (or SPAD meter) is a simple, portable diagnostic tool that measures the greenness or relative chlorophyll content of leaves.

Readings are given in soil plant analysis development (SPAD)values that indicate relative chlorophyll content. SPAD values have strong linear relationships with weight or thickness or area based nitrogen concentration. The linear relationship between nitrogen and SPAD values has led to the adaptation of the SPAD meter to assess crop N status and to determine the plants need for additional N fertilizer. A non invasive meter.

SPAD 502 measures the greenness straight off the leaves. Compared to traditional destructive methods, the use of this equipment saves time, space and resources The SPAD 502 is used in many crops to diagnose the integrity of photosynthesis, predicting nitrogen status, maximize yield and fertilizer management. From cultivation to harvest, SPAD are used for crops and fertilizer management.

Type: Handled meter for measuring chlorophyll using optical density difference at two wavelengths.

Measurement sample: Crop leaves

Measurement system: Optical density difference at two wavelengths Measurement area: 2 x 3 mm

Light Source: 2 LEDS (light emitting diodes) Receptor : 1 SPD (silicon photodiode)

Display: Measurement data : 3-digit LCD with decimal point. Data number : 2-digit LCD

Data Memory: Space for 30 data sets

Controls: Power switch, AVERAGE Key, ALL DATA DELETE key, ONE DATA DELETE key, and DATA RECALL key

Power source: 2 AA-size alkaline-manganese (1.5V) batteries Battery line : More than 20,000 measurements

Minimum interval between measurements: Less than 2 seconds.

Accuracy: Within 1.0 SPAD unit (at room conditions, SPAD value between 0 and 50)

Repeatability : Within 0.3 SPAD units (SPAD value between 0 and 50) 

Reproducibility: Within 0.5 SPAD units (SPAD value between 0 and 50) Temperature drift : Less than 0.4 SPAD units/C

Temperature range: Operation : 0 to 50C; Storage : - 20 to + 55C

Dimensions 164 x 78 x 49 mm (6-7/16 x 3-1/16 x 1-15/16 in.) 

Weight: 225g (7-15/16 oz.) (not including batteries)

Other: Warning buzzer; User calibration function