ACM-200 plus Anthocyanin Content Meter. This is an affordable instrument that will work with leaves or flowers. It works well with samples that do not have a high chlorophyll content (van den Berg A.K., Perkins T.D. 2005), (Morris J.B., Wang M.L. 2007). Designed for one handed operation, averaging is also possible. It includes a non-volatile flash memory that can store between 94,000 and 160,000 measurements. Data transfer is by USB port.

Measured Parameters:

Optical absorbency in two different wave bands (530 nm and 931 nm). Designed to measure chlorophyll content and compensate for leaf thickness.

Measurement Area:

3/8" diameter circle, (0.71 cm2).

Resolution:

+/- 0.1 ACI Unit.

Repeatability:

+/- 1%.

Source:

(1) LED (peak at 530nm).

(1) Infrared LED (peak at 931 nm).

Detector:

Silicon photodiode with integral amplifier for absorptance measurement and source power monitoring for temperature compensation.

Storage Capacity:

Between 94,000 and 160,000 measurements.

Modes:

• Single point measurement,
• 2 to 30 point averaging
• 10 to 30 point averaging with elimination of fliers outside a two sigma range.

Comments:

Alpha numeric comments may be added with each measurement or only when there is a change that requires notes.

User Interface:

128 x 32 pixel display, 6 keys for control and data manipulation, beep signal for status and warnings.

Output:

USB 1.1 and RS-232 interface for GPS.

Temperature Range:

0-50 Degrees C.

Temperature Drift:

Temperature compensated source and detector circuitry for minimum drift over full range.

Power Source:

9V Alkaline Battery.