“Precision in mass and force.”

M1 weights

M1 is the standard class for checking industrial and trade scales: bench, floor and pallet scales and weighbridges. MASSLAB calibrates M1 weights in its own laboratory.

Available M1 weights

Our range of M1 weights runs from 1 mg to 2.000 kg, made in RVS, gietijzer, verchroomd staal and staal. For each product the table shows the nominal values, the tolerance according to OIML R111, the delivery time and the price excl. VAT.

Weight sets Knob and cylindrical weights Milligram weights Block weights Heavy weights and mass pieces Slotted and hook weights KERN weights

Class M1 tolerances according to OIML R111

Maximum permissible error (±) per nominal value, next to the adjacent classes.

Nominal value	F2	M1	M2
1 mg	0,06 mg	0,2 mg	–
10 mg	0,08 mg	0,25 mg	–
100 mg	0,16 mg	0,5 mg	1,6 mg
1 g	0,3 mg	1 mg	3 mg
10 g	0,6 mg	2 mg	6 mg
100 g	1,6 mg	5 mg	16 mg
1 kg	16 mg	50 mg	160 mg
5 kg	80 mg	250 mg	800 mg
10 kg	160 mg	500 mg	1,6 g
20 kg	300 mg	1 g	3 g
50 kg	800 mg	2,5 g	8 g
500 kg	8 g	25 g	80 g
1.000 kg	16 g	50 g	160 g

Source: OIML R111-1. All nominal values and classes are listed in the full tolerance table.

Weights with a certificate from our laboratory

Weights in classes F1 to M3 are available with a traceable calibration certificate from our own laboratory. We also carry out periodic recalibration in-house.

Weight calibration All weights

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M1 weights

M1 sheet weight 1 mg – 500 mg, Stainless steel, polished (KERN 348)

M1 cylindrical 1 g – 20 kg, Chrome-plated steel (Baxtran)

M1 knob shape 1 g – 10 kg, Stainless steel, fine-turned (KERN 347)

M1 cylindrical 1 g – 10 kg, Stainless steel, polished (Baxtran)

M1 calibration weight 1 g – 2 kg (Adam)

M1 hook weight 1 g – 10 kg, Stainless steel, fine-turned (KERN 347)

M1 slotted weight type A 1 g – 10 kg, Stainless steel, fine-turned (KERN 347)

M1 slotted weight type B 5 g – 10 kg, Stainless steel, fine-turned (KERN 347)

M1 block weight 5 kg – 50 kg, Cast iron, painted (Baxtran)

M1 support rod 10 g, Aluminium (KERN 347)

M1 ECO block weight 5 kg – 50 kg, Cast iron, painted (KERN 346)

Weight set M1 1 mg – 10 kg, cylindrical, Stainless steel, polished (Baxtran)

Weight set M1 1 mg – 500 mg, sheet weight, Stainless steel, polished (KERN 348)

M1 block weight 5 kg – 50 kg, Cast iron, painted (KERN 346)

Weight set M1 1 mg – 10 kg, cylindrical, Chrome-plated steel (Baxtran)

M1 support rod 100 g – 10 kg, Stainless steel, fine-turned (KERN 347)

M1 calibration weight 5 kg – 20 kg, Cast iron, painted (Adam)

Weight set E2 to M1 1 g – 2 kg, Stainless steel (KERN 315)

Weight set M1 5 g – 2 kg, Stainless steel (KERN 315)

Weight set M1 1 g – 10 kg, knob shape, Stainless steel, fine-turned (KERN 344)

Weight set M1 1 g – 2 kg (Adam)

Weight set M1 1 mg – 10 kg, knob shape, Stainless steel, fine-turned (KERN 343)

M1 block weight 5 kg – 50 kg, Stainless steel (Baxtran)

M1 stackable cylindrical weight 5 kg – 50 kg, Stainless steel, polished (Baxtran)

M1 block weight 5 kg – 50 kg, Stainless steel (KERN 346)

M1 check weight with handle 5 kg – 50 kg, Stainless steel, fine-turned (KERN 347)

M1 heavy weight 100 kg – 2,000 kg, Steel, painted (KERN 346)

M1 heavy weight 100 kg – 2,000 kg, Steel, painted (Baxtran)

M1 weight basket 20 kg – 60 kg, Stainless steel (KERN 346)

M1 weight basket 20 kg – 60 kg, Stainless steel (KERN 347)

Available M1 weights

Class M1 tolerances according to OIML R111

Weights with a certificate from our laboratory