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SpectroDirect

Spectrophotometer for water and waste water testing 330 – 900 nm.
Applications: Waste Water, Drinking Water, Industrial Process Water, Scientific & Research, Governmental and Private Laboratories

Applications of Lovibond Reagents » Applications reagents
Reagents for Photometry » Applications reagents
Reagents also suitable for use in Hach® (Disclaimer) devices » Applications reagents

Highlights

  • Wavelength range from 330 to 900 nm
  • Interface RS232
  • Large illuminated graphic display>
  • Touch-sensitive film keypad with logical layout
  • Use of round vials and rectangular cells of different sizes without adapter
  • 35 user-specific methods
  • Fast, easy lamp change
  • Software updates via internet

Functions

  • Pre-programmed Lovibond methods
  • Absorption
  • Transmission
  • Spectral data recording
  • User calibration (polynomials)
  • Concentration (linear)
  • Kinetics

Description

The SpectroDirect is a modern single-beam spectrophotometer with an excellent price/performance ratio that is specifically designed for water testing.

The instrument is equipped with a wide range of pre-programmed methods based on the proven range of Lovibond tube tests, tablet reagents, liquid reagents and powder reagents (Vario Powder Packs).


SpectroDirect

Self-test

After it is switched on, the SpectroDirect automatically performs a self-test – beginning with a function test of the stepper motor and the halogen lamp, followed by an optics test. For this purpose, the unit has a built-in didymium glass filter.

This filter checks the correct wavelength setting. If the wavelengths are incorrect, the optical system is automatically adjusted during the self-test.

Optics

The SpectroDirect is a single-beam spectral photometer (see illustration). The light source is a tungsten halogen lamp with flash function. The lamp is switched on only momentarily during of the measurement process1), so there is no need for a warm-up period. The SpectroDirect is ready to perform a self-test as soon as it is switched on.

The light passes through an entry slot to the monochromator, where it is split into spectral ranges. The monochromator is a holographically produced, transparent grating. The movable mirror ensures that light of the desired wavelength is focused automatically so that it passes through the exit slot, into the sample chamber and therefore through the water sample. The light that is not absorbed by the sample travels to the silicon photodiode detector. This signal is then evaluated by a microprocessor and shown as a result in the display.
1) (Exception: permanent light is used for a wavelength scan).

N.I.S.T. Traceability

This spectrophotometer can be tested using a Secondary Standard Filter Set (order code 711160) which is N.I.S.T. traceable. Furthermore the instrument may be calibrated for each method in a “user calibration mode” with N.I.S.T. traceable standards.