Draft survey

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  • Draft survey

Draft survey

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Polymide coated measuing tape with special weight for the Draft surveyors.
 

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  • Measuring tapes Class I
    For the measurement of liquid levels

    Specifications
    Width : 13x0.2 mm, carbon steel, stainless steel
    Length : 5, 10, 15, 20, 25, 30, 40, 50, 60, 75, 100 m
    Reference temperature : 20 oC
    From the council directive of 19 November 1973, (73/362/EEC),
    Calibration and tolerance: Accuracy according EC pattern approval, Class I (watch the marking!)
    Maximum permissible errors: Formula: (a+b.l) in which 'L' is the length in question "a" and "b" are coefficients fixed for each class of accuracy. Class I (a=0.1 mm, b=0.1 mm, L= length in m) example 10m tape: 1.1 mm


    Units of graduation
    Graduated in metres, centimetres and millimetres


    Carbon steel tapes
    mm graduation, each m, dm and cm figured, deep etched markings,
    in natural steel colour, on dark etched background.
    For all-round use.

    Stainless steel tapes
    mm graduation, each m, dm and cm figured, deep etched markings,
    in natural steel colour, on dark etched background.
    With stainless steel plumb-bob chemical resistant.
    For corrosive liquids.

    Polyamide coated steel tapes
    mm graduation, each m, dm and cm figured, steel tapes with phosphate layer and polyamide coating, yellow background, black graduations, black-red figures.
    Transparent chemical resistant polyamide coating.
    For all-round use, easy to read in the dark.

    All tapes are produced with the tension according to the weight of the plumb-bob,
    for example: dip-weight 400 gram = tension 4 N.

    Windingframes
    strong brass frame with wooden handle (chemical safe), long foldable
    winding arm which locks into position. Specially designed for tank dipping
    tapes. Tape rolls out at the front. Tapes more then 40 metre cross-frame advised


    Dip-weights
    Dip-weight in the form of a rod, terminating in a truncated cone at the lower end.
    This cone provides the necessary of 'touch' in dipping and it penetrates sludge more
    easily. A stainless steel tip on the brass dip-weight prevents wear down.
    The dip-weight is connected to the tape in a fixed way (by means of a screw).

    The graduation in mm. continues on one flat side of the dip-weight, ensuring
    there will be no 'blind spot' where the tape is connected to the weight.

    Stainless steel dip-weights are intended to use with stainless steel tapes.
    Brass dip weights are to be used with carbon steel and polyamide coated tapes.

    Dip weights available in 400 gram for watery like liquids, 700 gram most common one for oils and fats and a 1000 gram dip weight.
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