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Model AC-S -In-Situ Spectrophotometer
Based on the highly successful ac-9, the ac-spectra (ac-s) offers almost an order of magnitude increase in spectral resolution of in-situ absorption and beam attenuation. The 4 nm resolution allows for spectral `fingerprinting` and deconvolution analysis.
The ac-s features a proven flow-through system, compact size, and excellent stability. With 80 (+/-5) wavelength outputs from 400–730 nm, the 4 nm resolution allows for spectral “fingerprinting” and deconvolution analysis. The ac-s employs a 25-cm pathlength for effective measurement of the cleanest natural waters.
Specifications
MECHANICAL
Diameter: 10.4 cm
Length: 79 cm
Weight in air: 5.9 kg
Weight in water: 0.8 kg
ELECTRICAL
Input voltage: 10–35 VDC
Output: RS232, RS485
Current draw: 0.83 A @ 12 V nominal
Connector: MCBH6MP
ENVIRONMENTAL
Temperature range: 0–30 o C
Depth rating: 500 m
OPTICAL
Spectral range: 400–730 nm
Bandpass (FWHM), nm:
400: 10–18
450: 10–16
550: 10–15
650: 10–18
730: 10–25
Pathlength, cm: 10 or 25
Beam cross-section: 8 mm dia. (nominal)
Linear dispersion: 6–7.0 nm/mm
Resolution: 4 nm
Precision, 400 to 449 nm:
+/-0.003 m-1 typ., 0.006 m-1 max @ 1 Hz
+/-0.005 m-1 typ., 0.012 m-1 max @ 4 Hz
Precision, 450 to 730 nm:
+/-0.0005 m-1 typ., 0.0015 m-1 max @ 1 Hz
+/-0.001 m-1 typ., 0.003 m-1 max @ 4 Hz
Accuracy: 0.001–10 m-1
