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Lovibond MultiDirect
The MultiDirect is a contemporary, microprocessor-controlled photometer with ergonomically designed keypad and large-format graphic display. It is equipped with a wide range of pre-programmed methods based on the proven range of Lovibond® tablet reagents, liquid reagents, tube tests and powder reagents (VARIO Powder Packs). Users can also store their own methods.
The MultiDirect is a filter photometer using interference filters at 6 different wavelengths. The unique design of the optics allows the automatic selection of the required wavelength without any moving parts. This and the dual beam technology utilizing an internal reference channel, guarantees the highest accuracy.
For portable use, the instrument operates with seven standard rechargeable batteries (supplied). These batteries are available all over the world and are easily changed. The integrated intelligent charge controller allows simultaneous operation of the unit and battery charging (using the supplied power pack). The MultiDirect also operates without a power pack by using alkaline manganese batteries.
The entire instrument, including sample chamber (the most critical component of any photometer) and battery compartment, is waterproof, ensuring that no water comes in contact with the electronic components.
Technical Data

Display: Graphic-display
Optics: 6 temperature compensating LED, internal reference channel, photodiode in protected sample chamber
Wavelengths: 6 interference filters in one unit,
λ1 = 430 nm IF Δ λ (nm) = 5,
λ2 = 530 nm IF Δ λ (nm) = 5,
λ3 = 560 nm IF Δ λ (nm) = 5,
λ4 = 580 nm IF Δ λ (nm) = 5,
λ5 = 610 nm IF Δ λ (nm) = 6,
λ6 = 660 nm IF Δ λ (nm) = 5
IF = interference filter
Interface: RS232 for printer and PC-connection
Download: Software and methods update by means of the internet
Operation: Acid and solvent resistant, touch-sensitive keypad with audible feedback
Power: 7 Ni-MH-battery pack Supply (AA/Mignon), charged whilst in the unit with external mains charger, integrated overload cut-out
Dimensions: 265 x 195 x 70 mm (L x W x H)
Weight: approx. 1000 g (unit) with rechargeable batteries
Ambient: up to max. 90 % humidity (non condensing) approx. 5– 40 °C
Auto-Off : approx. 20 minutes after last keypress with no loss of data
Auto-Check: By pressing ON/OFF-key
Memory: approx. 1000 data sets Capacity with date, time and registration number
Approval: CE

N.I.S.T. Traceability
The instrument has a factory calibration, which is related to internal standards, which are not N.I.S.T traceable. The instrument may be calibrated by the user in a “user calibration mode” with N.I.S.T traceable standards.
(N.I.S.T. = National Institute of Standards and Technology)
New methods
Test methods are regularly updated to suit market requirements. You can find software updates for new methods and additional languages on our website at www.tintometer.com.
Polynomials
With the help of an external mathematical program, the corresponding polynomial is created from data pairs (concentration/absorption). A known polynomial may also be used. 25 order polynomials (y = A+Bx+Cx2 +Dx3 +EX4 + FX5) can be stored together with user-specific parameters such as wavelength, measuring range, unit and number
of decimals.
Concentration
This function can be used to measure 2 to 14 known standards. On the basis of the concentrations/ absorption pairs obtained, the photometer will calculate a linear interpolation between the measured points. Up to 10 methods can be stored for further sample measurements
Delivery Content
The instrument is supplied complete and readytouse incl. 7 rechargeable batteries and mains charger, 100-240 V, PC connection cable, 3 x 24 mm vials, 3 x 16 mm vials, 1 adapter for 16 mm vials, 3 syringes of various sizes, 1 plastic beaker 100 ml, carrying case with water resistance foam, but without reagents.