Month: April 2014

Double Beam Balance

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Double Beam Balance Scale,MB-200
MB200 Single-pan balance is of unequal arm type with two scales .I t is easy to operate .The weight of 100g range can be read directly and the maximum capacity is 200g with the supplied attachment weight .
It is widely used for weightings in manufacturing and mining industries ,pharmaceutical companies ,medical units ,chemical works, school labs, etc .
FEATURES:
.Taring
.Double scales direct reading
SPECIFICATIONS
Model     MB200
Capacity 200g
Sensitivity    200mg
Main scale range  0-90g*10g
Front scale range 0-10g*0.2g
Pan diameter    89mm
Stainless Steel
Packing dimensions  420*280*240
(10Pcs)
Gross weight    11kg
(10pcs)
A double beam balance is a balance comprising of a lever that has two equal arms and a pan suspended from every arm. The pan is where the object to be measured is placed. It also has two beams that have sliding weights to record the measurement.
There are two general types of double beam balance scales. The first is the tabletop kind that is most often seen in laboratories. The second type is more familiar to the general population because it is commonly used in a doctor’s office to determine your weight. Both types have a pan on which the object being measured is placed and two beams with sliding weights to record the measurement. The method for using both types is the same.
Instructions
1        Check the beam to make sure it is balanced with nothing on the scale.
2        Place the object to be weighed on the pan. If you are using a doctor’s scale, stand on the pan. The indicator will move upward.
3        Slide the larger weight along its beam until the indicator points downward. Many scales will have notches for the larger weight. Once the indicator falls, slide the weight back one notch. The indicator should rise again slightly above the center mark.
4        Slide the smaller weight along its beam until the indicator is balanced and points to the center mark. This smaller weight allows greater precision than a single weight on a single beam
5        Read the values indicated on each beam’s scale and combine them to get the object’s or person’s weight.

Harvard Trip Balance,Dual Beam Balance Scale,Dual Beam Balance balance

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  • Harvard Trip Balance,Dual Beam Balance Scale with Stainless Steel Plate Weigh Pans JPT-20A
  • Two Stainless Steel Platforms

    This mechanical scale has two durable stainless steel weighing platforms for comparison weighing in labs and classrooms. Unlike gold or silver, stainless steel doesn’t scratch easily and keeps its shine without rusting or tarnishing.

  • Double Weighing Beams

    This beam balance has two weight beams for more precise weighing. The larger beam measures to 200 grams with 10 gram resolution and the smaller to 10 grams with 0.1 gram resolution.

  • Tare Poise

    This mechanical balance comes equipped with a tare poise. This will let ya zero the weight of a separate container without the need for additional counter weights. You can tare up to 225 grams of weight with this beam balance.

  • Zero Adjust Knob

    Before you start weighing with the Harvard 1560SD you can make sure it’s set to zero by using the zero knob on the side of the balance. This can help assure you’re getting the most accurate weight readings from this Harvard Trip balance.

  • Magnetic Damping

    You don’t have to worry about this balance bouncing around taking forever to stabilize. Ohaus was smart with this mechanical balance and designed it with a magnetic damping system to make weighing and reading your weights quick and painless.

Penn Scale Mechanical Baker’s Scale

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  • Penn Scale, Mechanical Baker's Scale
  • Perfect For Baking

    When ya weigh what you’re putting into your recipes, you have a much better chance of your recipes coming out just right every time. This scale is perfect in bakeries and professional kitchens for mixing and portioning larger batches of dough. The best part is, ya don’t have to search high and low for an outlet to plug this scale into…It doesn’t use any power at all!

  • Durable Cast Iron Construction

    There’s nothing wimpy about this mechanical baker’s scale. Penn Scale designed the 1402 with an all cast iron construction and powder coated finish to prevent rusting. This mechanical balance also has case hardened steel pivots and bearings for extra durability.

  • Footed Scoop & Counterweight Included

    You can weigh your ingredients on the large weighing pans, or with the included weighing scoop. Your choice of stainless steel, tin or plastic scoop comes complete with its own counterweight for taring.

  • Easy To Read Weight Beam

    You’ll have to problem at all reading the weights from this ingredient scale. The weights of your ingredients are displayed right on the front of the scale, so you can weigh quickly and efficiently.

  • FDA Approved Coating

    Penn Scale made sure their baker’s scales are safe for your foods and ingredients. This scale’s durable coating is FDA approved safe for use with foods

Mechanical Triple Beam Balance

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Mechanical Triplebeam Balance
MB-2610B is a traditional triple beam mechanical balance. Features a large stainless steel weighing surface and cool white finish. The attachment weight set is included, allowing you to increase the capacity from 610g to 2610g.The 3-Beam Mechanical Balance has a 2610 gram capacity with a 0.1 gram resolution. This scale has a steel weighing platform, notched and tiered weighing beams, and a magnetic damping system. Attachment weights included.
The triple beam scales are widely used in industrial and mining enterprises, chemicals, pharmaceuticals, agriculture, machinery, schools and other units for substance use measure.
Model MB-2610 MB-2610B
Weighed (g) 2610 2610
Dividing the value (g) 0.1 0.1
Former ruler 10 × 0.1g 10 × 0.1g
The scale bar 500 × 100g 500 × 100g
After the ruler 100 × 10g 100 × 10g
Peel the range 0 ~ 225g
A durable, classroom proven work horse. Unlike the digital scale, a mechanical triple beam teaches mathematical reasoning skills as students must manipulate the sliding weights for a result. With the 2610g capacity this scale is also handy for home and shop use.

Resolution to 0.1
Standard Underhook
Advanced Stabilization Software
Built-in motorized calibration

Max capacity Readable Packing Packing size N.W/G.W
2610g 0.1g 4PCS/CTN 51*36*47cm 11kg/13kg

 

Instructions on use

  • The triple beam balance is used to measure masses very precisely; the reading error is 0.05 gram.
  • With the pan empty, move the three sliders on the three beams to their leftmost positions, so that the balance reads zero. If the indicator on the far right is not aligned with the fixed mark, then calibrate the balance by turning the set screw on the left under the pan.
  • Once the balance has been calibrated, place the object to be measured on the pan.
  • Move the 100 gram slider along the beam to the right until the indicator drops below the fixed mark. The notched position immediately to the left of this point indicates the number of hundreds of grams.
  • Now move the 10 gram slider along the beam to the right until the indicator drops below the fixed mark. The notched position immediately to the left of this point indicates the number of tens of grams.
  • The beam in front is not notched; the slider can move anywhere along the beam. The boldface numbers on this beam are grams and the tick marks between the boldface numbers indicate tenths of grams.
  • To find the mass of the object on the pan, simple add the numbers from the three beams.
  • As with a ruler, it is possible to read the front scale to the nearest half tick mark.

Newton Spring Scale

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Newton Spring scale
The spring balance actually measures force, but for convenience is calibrated in kg on the basis that when it is used normally [weight force] = m * g where m is the mass in kg and g the acceleration due to gravity. (9.8 m/s^2)
So you just need to multiply the scale reading by 9.8 to get the force measurement in newtons.
1 kg reading => 9.8 N
2 kg reading => 19.6 N etc
Scales measure force…by definition
Balances measure mass.

Scales calibrated in kilograms are only done so for convenience, because we often use them to weigh in Earth standard gravity, and what we really want is the mass, but we cheat by using the scale instead of the balance.

Newtons aren’t a very popular unit in common use outside the study of physics…unfortunately, and so is the distinction of mass vs weight unpopular for one to understand.

For this reason, a 1 kg reading on a spring scale refers to 9.8 Newtons of tension, and it scales proportionally. This refers to the TENSION force with which the spring scale pulls on something.

If used to measure friction force, it is only done so indirectly. Because the target object is, in a good experiment, pulled at constant velocity, forces on it add up to zero, and as such, the tension need fully oppose the friction, should the scale be pulled horizontally and should the surface be flat.

Brass Newton Spring Scales, Heavy Duty

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  • heavy duty brass Newton spring scales
  • Brass barrel, heavy duty.
  • Convenient Weight Marker

    When ya give this spring scale a tug, the weight marker will slide to the appropriate weight and stay there until ya move it back to zero. This will help ya out when you’re weighing items that are a little on the heavy side. Load, weigh, unload, check your weights…it’s really simple.

  • This Thing Sure Is Durable

    This mechanical scale was built to last. Inside the corrosion resistant housing you’ll find stainless steel components that are attached to the stainless steel weighing hook and hanger. Whether ya want to use this as a fishing scale, hunting scale, bow scale, or just a great general purpose scale, you’re good to go with this Halsun.

 

The spring balance actually measures force, but for convenience is calibrated in kg on the basis that when it is used normally [weight force] = m * g where m is the mass in kg and g the acceleration due to gravity. (9.8 m/s^2)
So you just need to multiply the scale reading by 9.8 to get the force measurement in newtons.
1 kg reading => 9.8 N
2 kg reading => 19.6 N etc

Spring Scale

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  • Newton Spring Scales
  • Convenient Weight Marker

    When ya give this spring scale a tug, the weight marker will slide to the appropriate weight and stay there until ya move it back to zero. This will help ya out when you’re weighing items that are a little on the heavy side. Load, weigh, unload, check your weights…it’s really simple.

  • This Thing Sure Is Durable

    This mechanical scale was built to last. Inside the corrosion resistant housing you’ll find stainless steel components that are attached to the stainless steel weighing hook and hanger. Whether ya want to use this as a fishing scale, hunting scale, bow scale, or just a great general purpose scale, you’re good to go with this Halsun.

 

The spring balance actually measures force, but for convenience is calibrated in kg on the basis that when it is used normally [weight force] = m * g where m is the mass in kg and g the acceleration due to gravity. (9.8 m/s^2)
So you just need to multiply the scale reading by 9.8 to get the force measurement in newtons.
1 kg reading => 9.8 N
2 kg reading => 19.6 N etc
Scales measure force…by definition
Balances measure mass.

Scales calibrated in kilograms are only done so for convenience, because we often use them to weigh in Earth standard gravity, and what we really want is the mass, but we cheat by using the scale instead of the balance.

Newtons aren’t a very popular unit in common use outside the study of physics…unfortunately, and so is the distinction of mass vs weight unpopular for one to understand.

For this reason, a 1 kg reading on a spring scale refers to 9.8 Newtons of tension, and it scales proportionally. This refers to the TENSION force with which the spring scale pulls on something.

If used to measure friction force, it is only done so indirectly. Because the target object is, in a good experiment, pulled at constant velocity, forces on it add up to zero, and as such, the tension need fully oppose the friction, should the scale be pulled horizontally and should the surface be flat.

Mechanical Quadruple Beam Balance Scales

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Mechanical Quadruple beam blance scaleQuadruple Beam Balance Scale. For Laboratory and Educational Use

MB311 Quadruple Beam Balance

  • 311 gram capacity
  • 0.01g readability
  • 1 centigram accuracy
  • Agate bearings for long life
  • 3.5” diameter stainless steel pan
  • Adjustable recessed platform in base can be raised for specific gravity work

This scale has been around for many years.  The quadruple beam design is very popular and is used extensively in schools and laboratories.  This high quality balance is made with stainless steel and aluminum alloy.  These balances are very durable and give better long term service than electronic scales of similar accuracy.

Made of high quality aluminum alloy and stainless steel. Convenient direct beam graduation.

Quadruple Beam scale

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Quadruple Beam scale,Quadruple Beam balance scale, mechanical Quadruple Beam scale

The MB311 Single-pan balance is of unequal arm type with 4 beams.The maximum capacity is 311 grams and the readability is 0.01g .It is made of a high quality aluminium alloy ,the knife is made of a high quality alloy and the bearing plane is of agate ,with a stainless steel weighting pan and includes a buit in platform to aid density determination by weighting samples in air and in water .It is widely used for schools and educational establishments, etc.

Quadruple Beam Balance Scale for Laboratory and Educational Use

MB311 Quadruple Beam Balance Scale

  • 311 gram capacity
  • 0.01g readability
  • 1 centigram accuracy
  • Agate bearings for long life
  • 3.5” diameter stainless steel pan
  • Adjustable recessed platform in base can be raised for specific gravity work

 

Laboratory Mechanical Quadruple Beam Balance / Physical Balance / Mechanical Balance

Application:
1. The MB311 Single-pan balance is of unequal arm type with 4 beams.
2. The maximum capacity is 311 grams and the readability is 0.01g.
3. It is made of a high quality aluminium alloy, the knife is made of a high quality alloy and the bearing plane is of agate, with a stainless steel weighting pan and includes a buit in platform to aid density determination by weighting samples in air and in water.
4. It is widely used for schools and educational establishments, etc.
5. Adoption of agate knife edge bearing and specially-treated steel knife effectively improve the sensitivity of the balance.
6. Damping device reduces the oscillation frequency during working of the balance, tarring device facilitates weighing of bulk goods, with 210g/610g/310g riders, it facilitates users’ small amount weighing.

 

Main technical date:
1.Capacity: 311g
2.Sensitivity(g):0.01g
3Beam Calibrations
4.Front beam :1 x 0.01g
2nd beam: 10 x 1g
3rd beam: 100 x 10g
4th beam: 200 x 100g
5.Damping system: magnetic
6.Stainless Steel Weighing Pan: 100mm (4″)diameter
7.Density platform: 75mm (3″)diameter, adjustable height.
8.”2.92 x 3.15″ (7.42 x 8.01cm) heavy aluminum-look adhesive label on balance
9.Overall size (W x H x D): 370 x 300 x 137mm (14.5″ x 11.8″ x 5.4″).

Quadruple Beam Balance

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Quadruple Beam Balance,Quadruple Beam Balance Scale
Quadruple Beam Balance are widely used in industrial and mining enterprises, chemicals, pharmaceuticals, agriculture, machinery, schools and other units for substance use measure.
Model MB-311
Capacity (g) 311
Dividing the value (g) 0.01
Former ruler 1 × 0.01g
Second scale 10 × 1g
Third ruler 100 × 10g
After the ruler 200 × 100g
Net Weight (1 pc) 2.2  kg
Gross Weight (1 pc) 2 .4  kg
Outline 3 6 0× 1 4 0 × 30 0 mm
Out Packing (4 pcs) 75 0× 450 × 37 0 mm  ( by  carton)
Gross Weight (kg) 10 kg

A quadruple-beam balance is a handy laboratory tool to have when you need to weigh small items to a hundredth-gram precision. The beams are horizontal metal rails that hold sliding counterweights, starting with 100 grams and going down to a tenth-gram. The first beam is furthest back from the user; it holds the 100-gram mass, the second is closer, having the 10-gram, and so on. The tenth-gram beam is marked in .01-gram increments. An adjustable weighted screw on the left lets you precisely zero the scale. On the right is a tilting indicator. It’s vertically centered when the scale’s in balance, otherwise it’s over-or under-balanced.

How to Use a Quadruple Beam Balance
Instructions
1 Slide all the masses to the left most position or detent. With nothing in the pan, the indicator on the right should be horizontal, lined up with the mark. If it’s not, adjust the calibration screw on the left until the scale is completely balanced.
2   Add a few coins to the weighing pan. The indicator will tip up, showing that the scale is now under-balanced.
3 Move the largest mass (100g) right, until the scale overbalances with the indicator tipping downward. Then move it to the left one detent to under-balance it again. If the largest mass won’t overbalance the scale, go to the next step. It’s possible the object you’re weighing is too heavy for this scale.
4 Move the next-largest mass (10g) right, detent by detent, till the scale overbalances, as you did in step 3. Then move it to the left one detent.
5 Move the 3rd mass (1g) right, detent by detent, till the scale overbalances. Move it to the left one detent.
6 Move the smallest mass (.1g) carefully to the right until the scale is completely balanced. If all the masses are completely over to the right and the scale is still under-balanced, your object is too heavy for this scale.
7 Add the masses multiplied by the detents to determine the weight of your object. The first detent won’t count. Read the weight on the tenth-gram scale directly. For example, if the 100-gram mass is at its leftmost (first) detent, the 10-gram is at the fifth, the 1-gram is on the 8th, and the tenth-gram reads .56, the weight is (100 x 0) + (10 x 4) + (1 x 7) + .56 = 47.56 grams.
Tips & Warnings
When moving the first, second, and third masses, make sure they go into the detent notches in their respective beams. The fourth mass (.1 gram) may not have a detent.
How to Read a Quadruple Beam Balance
Using an electronic balance may be the easiest way to determine the mass of an object, but it can be beneficial to learn how to measure mass the old-fashioned way: with a beam balance. While triple beam balances are more common, a quadruple beam balance offers more accuracy. In fact, quadruple beam balances are even more accurate than many electronic balances.
Instructions
1        Calibrate the scale to make sure it reads zero when it is empty. Locate the screw adjustment knob and rotate it until the bar points directly to the middle of the balance.
2        Place the object to be weighed on the balance. Adjust the weights until the bar is pointing directly to the middle again. If the bar is pointing up, your current measurement is too low; if it is pointing down, your current measurement is too high.
3        Record the measurements of the largest three rows first. If one reads zero, disregard it. Read the last row, but be sure to take into account significant figures.
4        Add the readings of all four rows together. This is the weight of the object.
Tips & Warnings
For the smallest row, you have to take into account significant figures. You are allowed to take a one-decimal-place guess. For example, if you know it is past 0.13 but it is not quite to 0.14, you can guess that last decimal place.
If you don’t calibrate the scale to begin with, your readings will be off. Take the time to make sure it is set to zero before you weigh your object.