Accu-hite Stadiometer

From its built-in leveling bubble to its functional design, Accu-Hite has long been the stadiometer
of choice. The headpiece comes with a lock knob for measurement accuracy and safety. For convenience, readings can also be taken in feet and inches.

Measuring Range 24 * 83 in / 61 * 212 cm
Graduations 1/16 in / 1 mm
Product Dimensions (HxWxD) 60'' x 3 3/4'' x 8 1/2''
Carton Dimensions 4 1/8'' x 62'' x 5 1/2''
Weight 2 lbs
Warranty 90 days

Baby Ruler For Seca Scales

Add the optional Baby Ruler to the scales to get the full benefits of both weighing and measuring in one step. The seca 231 has been arithmetically adjusted for scale tray contour to ensure accurate measurements. It is constructed of anodized aluminum for safety, sanitation and durability. Measuring Range- 14-32 in / 35-80 cm Graduations- 1/8 in / 1 mm Weight - 1 lb. Warranty- 1 year

Baby Scale

This contoured baby scale, with its large tray and three-button operation * hold, tare, lbs / kg * ensures convenience, precision, comfort and safety. An integrated damping system compensates for movement, and the PC-friendly RS 232 interface eliminates the need for manual input.

Capacity 44 lbs / 20 kg
Graduations 0.1 oz or 0.2 oz / 2 gm or 5 gm
(changeable to 22 lbs)
Product Dimensions (HxWxD) 6" x 21 1/2" x 11 3/4"
Tray Dimensions 8" x 21 1/2"
Carton Dimensions 16 1/4" x 25" x 8 1/2"
Weight 15 lbs
Power Supply 6 AA rechargeable batteries /
A/C UL adapter/recharger
Serial Interface RS 232
Warranty 1 year

Bmi Calculator

Carrying Case

Carrying Case

Cart For Mobile Support Of Seca Baby Scales

Custom-made indentations in the surface hold seca baby scales firmly in place. Ideal working height of 80 cm / 31.5 inches. Optionally available paper roll holder helps you keep the work area clean. The perfect supplement to seca baby scales. The seca 402 cart is the ideal addition to seca baby scales. It was specially developed for safe and hygienic routine use in hospitals and medical practices. Customized indentations on the surface accommodates the scale019s base and ensures the scale does not slip out of place. Two practical brakes keep the cart securely locked in place so babies can be weighed safely. Also, you can quickly move the baby scale to it019s required location by pushing or pulling the cart by its handle. Compatible with seca baby scales (seca 727, seca 728, seca 374, 334, 354). -Paper roll holder optional-

Case For Seca 334 Baby Scale

Case for Seca 334 baby scale

Circumference Tape

Circumference Tape w / Waist To Hip Ratio

Classic Scale

seca 700

The renaissance of a classic calls for more than just a tool for weighing. It represents 160 years of manufacturing experience, as well as the courage to set new standards * which we did on the seca 700, by increasing capacity up to 400 lbs. We also focused on providing more comfort, to meet the patients demands. A slip-resistant, heavy-duty, cast-iron base, eliminating the need for a mat, is just one feature thats typical of secas ease of use. By merging the classic body design and white color with innovative features, seca has created a superior product that offers long life and a 5 year warranty. Available with lbs, kg or lbs/kg display.

Capacity 400 lbs
Graduations 4 oz
Dimensions (HxWxD) 57 1/2" x 17" x 20"
Base Dimensions 4" x 10 3/4" x 14 3/8"
Carton Dimensions 57" x 24 1/4" x 7"
Weight 39 1/4 lbs
Options Available in 160 kg / 400 lbs 160 kg
Warranty 5 years

Classic Telescopic Height Rod

The classic telescopic height rod is a favorite. The headpiece is secured on both sides for accuracy and folds down for a greater degree of safety. When added to a seca scale, it becomes a precision weighing and measuring package.

Measuring Range 23 5/8 * 78 5/8 in /
60 * 200 cm
Graduations 1/8 in / 1 mm
Product Dimen. (HxWxD) 30 7/8" x 2 1/8" x 11 1/4"
Carton Dimensions 1 3/4" x 2 1/2" x 35"
Weight 1 lb
Warranty 1 year

Diaper Scale

Digital Baby Scale

The seca 334 represents maximum safety and accuracy when weighing babies. Although its weighing tray is designed to be far more generous and comfortable than other models, at only 7 lbs itself, it requires amazingly little space. The large, clear LC display and practical handle, which can also be used to hang the scale, make childs play of daily weighing procedures.

Capacity 44 lbs / 20 kg
Graduations 0 * 22 lbs = 1/4 oz / 10 gm
22 * 44 lbs = 1/2 oz / 20 gm
Product Dimensions (HxWxD) 11 3/4'' x 25'' x 4 1/8''
Tray Dimensions 25'' x 8''
Carton Dimensions 16 3/4'' x 35'' x 7 1/2''
Weight 7 lbs
Power Supply battery
Warranty 1 year

seca 232

The seca 232 from head to toe * measuring made easy: Precision down to the millimeter is just one advantage of this mechanical measuring rod for babies. Built-in head and foot stands support the baby and offer reproducible measuring and weighing in only one step. Naturally it fits effortlessly onto our baby scale seca 334.

Measuring Range: 14-32 / (35-80cm)
Graduation: 1/8 / (1mm)

Digital Baby Scale

With their dual function, these baby scales are a small sensation: at the touch of a button, the tray can be detached quickly and easily from the base leaving you with a robust floor scale for children weighing up to 44 lbs ( 20 KG ). As the two elements are securley connected with one another, it is absolutely safe to lift and transport the scale. The soft, round shape of the tray gives the baby that so very important feeling of safety and security. With the brest-milk-intake function it is easy to determine the exact amount of milk the baby has taken when being breast-fed.

Digital Baby Scales

The shell-shaped design of the Seca 374 is consistent with the high demands made on its multiple functions: suitable for babies and infants weighing up to 40 lbs, the large tray provides maxium safety against the baby falling from the scales. The clear controls of the user interface are located on the slightly raised, ergonomically formed side of the scale facing the user. A large LCD display makes it quick and easy to determine the weight. A further advantage of the seca 374 is that it can also be operated using batteries and thus be used anywhere. the scale's extremely robust, hygienic surface of high-quality plactic is easily and quickly cleaned.

Digital Chair Scale

The digital chair scale offers traditional design with added mobility, so it can be brought directly to the patient. Compact design and locking wheels make the chair maneuverable. The seca 954 has swiveling armrests for easy seating and the desirable TARE function for taking out extra weight. Capacity 440 lbs / 200 kg Graduations 0.2 lb / 100 gm Product Dimen. 35 7/8" x 20" x 35" * Assembled (HxWxD)22 1/4" x 22 1/2" x 26 3/8" * Delivered byUPS Seat Dimensions 15 7/8" x 16 1/2" x 17 1/2" Carton Dimensions 22 1/4" x 22 1/2" x 26 3/8" Weight 51 lbs Power Supply 4 AA rechargeable batteries and A/C UL recharger/adapter Warranty 1 year

Digital Column Scales

Accommodate an increased weighing capacity with the Seca 703 The seca 703 column scale is designed to withstand the greatest loads and to continue to function precisely and safely after years of use as on the first day. Stability is not only evident; it is proven by the very high load-bearing capacity and the steady cast-iron base. Even patients who are affected by obesity can be weighed safely and with particularly high precision. Extremely robust, highly precise seca weighing technology with 660 pounds capacity Non-tilting base made of heavy-duty cast iron Impact- and scratch-resistant powder coating Wide range of functions: BMI, pre-TARE, HOLD, Auto-HOLD, mother+child function, three-step damping Expandable to measuring station with an optional height measuring rod Optional panda bear facilitates measuring and weighing children EMR-validated: transmit measured data directly to any electronic medical record system or printer

Digital Column Scales

With the innovation, digital measuring station seca 763, both the height and weight of a patient can be ascertained in just one step. After measuring and weighing, both values are indicated on two LCD displays intergrated into the display panel. On the basis of the values, the seca 763, at the touch of a button, automatically calculates the BMI of the patient. This value provides information on the general nutritional condition of the patient on the basis of the reconnised WHO standard. with its capacity of 250kg, its low platform and very robust design, the measuring station is also extremely suitable for heavyweight patients.

Digital Floor Scale

This personal digital floor scale was designed for the private sector. The quick-touch turn on and long-life batteries offer the utmost in operational ease.

Graduations 0.2 lb / 100 gm
Product Dimen. (HxWxD) 2 3/8" x 12 1/8" x 12 3/4"
Carton Dimensions 4 3/4" x 15 1/2" x 15 1/2"
Weight 10 1/2 lbs
Power Supply 4 AA alkaline batteries
Warranty 1 year

Disposable Measuring Tape With Practical Wall Disp

Disposable measuring tape of high-quality paper can reduce potential transmission of germs. Uncomplicated removal of measuring tape for immediate use. At hand at all times from exclusive wall dispenser. Extra space to write down name, height, weight and date. The measuring tape for daily use. Our experts are constantly striving to make your routine work as simple as possible. That019s why seca now offers the environmentally friendly and high-quality disposable measuring tape seca 218 with a practical wall dispenser for improved hygienic conditions. Now you have the desired measuring tape at hand when you need it. The small, space-saving wall dispenser is easy to install and to refill. seca 218 contains a designated space for noting the patient019s name and measurements. The seca 218 is available as a cm or cm/inch variety and in a pack of 500 (with dispenser) or 1000 pieces (without dispenser).

Electronic Bed Scale

There is scarcely any situation
in which a patients weight is not important. In many cases, determining weight and any
unexpected change to it can save lives, which is why
medical specialists in intensive care, in dialysis or treating
burns rely on the seca bed and
dialysis scales. Its reliable
limit value function means, for example, that invisible losses
of fluid or high turnover of fluid are noticed in good time to
enable the necessary assistance to be requested immediately
by an acoustic alarm. The accuracy of the seca bed and
dialysis scales makes it an
indispensable partner in intensive medicine.

seca 984 Quite simply ready for use: the electronic bed scale allows bed-ridden patients to be weighed simply, carefully and accurately and is an indispensable constituent of dialysis and intensive care. Integrated lifts
allow four measuring platforms to be placed simply and effortlessly under the castors of the bed. The previously determined weight of the bed is tared using the TARE function and the patients precise weight accurately determined. What is more: the unit remains alert even in the event of a power failure, storing all the previously determined values using rechargeable batteries.

Capacity 1100 lbs / 500 kg
Graduations 0.2 lb / 100 gm
Hold function, Pre-Tare function
Tare range 660 lbs / 300 kg
Max. patient weight 440 lbs / 200 kg
Power supply A/C UL adapter
Equipment trolley
Optional: second display and control panel for special functions
Warranty 1 year
Equipment trolley incl. display
Dimensions (HxWxD) 38 1/2" x 19 3/4" x 19 3/4"
Weight 56 lbs
Load cells
Dimensions (HxWxD) 5 3/4" x 8 3/8" x 12 3/4"
Weight 13 lbs
Carton Dimensions 43 1/2" x 24 5/8" x 33 3/4"

seca 434 Completing the dialysis and bed scale seca 984 is the multifunctional display offer-ed as an accessory. The most crucial component coming with it is the pause function; once activated anything can be put on the bed * i.e. an additional blanket * with no interference of the weighing process.
Pause function
TARE / HOLD function
Symmetric threshold value
7 storage spaces
RS 232 interface

Electronic Scale

ELECTRONIC COLUMN SCALE W/ BMI AND HEIGHT ROD INCLUDED -- 450 LB. CAPACITY

Emr Validated Column Scale With Eye-level Display

seca 787 + Medical-grade, robust scale for years of use with high patient volume + Digital measuring rod with an extra-long measuring range + Two-line display shows height and weight + EMR validated: Send results directly into the EMR + Damping system and Auto-HOLD guarantee quick and precise weighing + Display swappable to left or right side The price-performance champion of networkable measuring and weighing The seca 787 is the ideal solution for networked weighing and measuring. It features an especially sturdy design with a tilt-proof full metal platform and a robust single-piece column. All patients (especially those affected by obesity) will feel secure on the platform even when stepping on the edge of the base. The digital measuring rod allows for immediate BMI calculation. With an upgradable network module (seca 452) the seca 787 transmits height and weight measurements directly into your EMR system. Product width 16.1 inch - 410 mm Product height 53.4 inch - 1,356 mm Product depth 22.7 inch - 576 mm Measuring range digital 122 - 230 cm - 48 - 90 inch

Girth Measuring Tape ( Metric Or Standard )

Girth measuring tape with automatic retraction
Capacity 0 -150 cm (0 - 78 inch)
Graduations 1 mm
Dim.(WxHxD) 3 3/4'' x 2 1/2'' x 1''
Weight 1 lb.

Growth Charts

These Growth Charts for boys (blue) and girls (pink) are the fast, convenient way to track length/height, weight, head circumference and Body-Mass-Index percentiles by age. Plot newborns up to thirty-six months on the 405b or 405g and children from two to eighteen years on the 406b or406g.

Features: Charts derived from official CDC data 100 sheets per pad

Gurney & Stretcher Scales

The particularly large platform of the Seca 656 makes it possible to weigh patients not only in wheelchairs but also on all common roll-in systems or stretchers with intergrated and seperate under carriages. Thanks to its extermely robust construction and very high capacity of 360KG, it is possible to weigh even heavyweight patients with little effort. With the practical transport castors and the intrgrated handle, the scale can be moved around easily and can thus be used in different locations. The cable remote display, which can be wall mounted or placed on a table, can be operated intuitively and is equipped with many intelligent functions.

Hand-rail Scale

Comfort and safety are the main features of the 644 hand-rail scale. This 800 lbs. capacity scale has a generous platform area and large-diameter railing to provide even heavy patients to be weighed comfortably. The low level of the platform makes it easy to get onto and the curved railing provides a secure hand-hold. With it's locking castors and swiveling control/display panel, the seca 644 provides the medical staff with a high degree of flexibility. The 644 can be transformed into a complete measuring and weighing station: The seca 242 electronic measuring rod as well as the seca 222 measuring rod can be fitted as options. Technical data Capacity 800 lbs / 300kg Graduations 0.2 lbs / 100gm (HxWxD): 45 1/4 "x 29 1/4"x 29 1/4" Platform area:23 1/4"x23 1/4" Height of railing: 37 1/2" Width of railing: 27 3/4" Platform height: 2" Operating and read-off height: 43 1/2" Power supply: AC / ULadapter and rechargeable battery Warranty: 1 year Weight: 52.8 lbs

High Capacity Digital Platform Scale

This electronic high capacity platform scale has been developed to weigh obese, as well as, normal weight range patients. The high capacity of 800 lbs and the platform size of 24" x 24" inches will assure the accurate, and comfortable weighing of your day to day patients to your largest patients. The wired remote display can be wall mounted as well as hand held or placed on a desk. Features: seca 634 Capacity - 660 lbs/300kg Remote display Graduations - 0.2lb/100gm HOLD/TARE function Lb/kg switchable Power supply-A/C UL adapter 1-year warranty.

High Capacity Wheelchair Scale

The high capacity of 660 lbs of this wheelchair scale means that even heavy patients can be weighed with ease. Thanks to the extremely flat platform, the scale is easy for wheelchair-users to mount and the side barriers ensure maximum safety. The integrated pre-TARE function determines the patients net weight in seconds and a real advantage is its HOLD function, which continues to display weight in large, easy-to-read numbers even after the scale is no longer in use. The seca 664 can fold up in just a few easy steps, and its transport castors make it convenient to move.

Capacity 660 lbs / 300 kg
Graduations 0.2 lb / 100 gm
Product Dimensions (HxWxD) 36" x40 1/2" x 44 5/8"
Base Dimensions 2" x 31 3/8" x 44 5/8"
Carton Dimensions 42 3/8" x 40 1/8" x 14 1/2"
Weight 51 lbs
Power Supply A/C UL adapter
rechargeable batteries
Warranty 1 year


seca 664 C
The innovative next generation wheelchair scale.
Equipped with a Smartcard station several wheel- chair weights can be stored and recognized, so that only the patients weight will be shown. The station will automatically subtract the individual wheelchair weight if a Smartcard is inserted.
This enhanced model offers the same advantages as the seca 664 as well.

seca 450
The seca 450 Smartcard holder, once mounted to the wheelchair allows each card to ride along on the chair.

Infantometer

Infantometer

The seca 416 adds the smoothness and enhanced precision of a double bearing-mounted
footpiece. Readings are always repeatable, because the 416s head and footpiece will never
lose their perpendicularity.


Features: seca 416
Perpendicularly fixed headpiece
for supreme accuracy.
Double bearing-mounted
sliding footpiece.
Read Here mark offset on
transparent footpiece.
Specially treated, high quality
wood for durability.
Measurement range - 8 1/2-39" /
(21-99 cm).
Graduations - 1/16" / (0.1 cm).
1-year warranty.

Measure Mat Ii

The measure mat II is the simple and quick way to measure a babys growth from day one. The mats soft touch, lightweight rubber is gentle enough for baby, yet portable enough for easy storing and durable enough for wall mounting. It is extremely handy in delivery rooms where newborns are measured upside down.

Measuring Range 4 * 39 in / 10 * 99 cm
Graduations 1/4 in / 0.5 cm
Product Dimen. (LxWxD)52 7/8''x 11 3/4'' x 5 5/8''
Carton Dimensions 6'' x 12'' x 6''
Weight 1 1/2 lbs
Warranty 1 year

Measure Tape For Head

Non-Stretch Teflon Tape To Measure Head Circunference

Measuring Tape For Head Circumference Of Babies An

Hygienic disposable measuring tape of non-stretch Teflon material. Double function: head circumference with the front side of the tape and facial symmetry with the rear side. Easy-to-read, color-coded precise results. Practical dispenser (content: 15 tapes). Scale from 1 to 23 inch / 3 to 59 cm. Measuring tape for head circumference of babies and toddlers. The measuring tape is made of non-stretch Teflon synthetic material and measures both the head circumference (front side) and the symmetry of the face (reverse side). A practical dispenser (containing 15 tapes) ensures that they are stored safely.

Mechanical Baby Scale

Classic design and reliable construction make this mechanical baby scale a favorite for over 50 years. Rugged steel construction and cast levers ensure years of durability and accuracy. Removable tray makes transport and cleaning simple and convenient.

Capacity 32 lbs / 16 kg
Graduations 1/4 oz or 10 gm
Product Dimensions (HxWxD) 6 3/4'' x 21 3/4'' x 12''
Tray Dimensions 21 3/4'' x 8''
Carton Dimensions 15 3/8'' x 23'' x 7 1/2''
Weight 14 lbs
Warranty 1 year

Mechanical Column Scales W / Bmi

The Seca 755 is one of the first mechanical column scales which, in addition to displaying the weight, also displayes the respective nutritional condition of the patient with the BMI function. When the patient step on the scale, a BMI disc of consrtasting colour is set in motion below the very precise weight display in the large, clear dial. It is visible in a small window next to which a height scle is printed. Once the weight has been determinedm it is easy to read the bmi range which, with constrasting coloure, is split up into underweight, normal and overweight as well as adiposity ( adnormally overweight ). A flat tread area and practical transport castors are further advantages of the seca 755. It can also be coverted into a complete measuring and weight station by fitting the optional measuring rod seca 220.

Mobile Height Rod

Mobile Height Rod w / optional scale attachment ( meausures 8-21 inches )

Multifunctional Electronic Flat Scale

Extensive high technology: A multifunctional electronic flat scale designed especially for people needing assistance or heavyweights. Thanks to its extremely flat and large platform with built-in ramp weighing people in wheelchairs or seated during dialysis is no problem at all. As the seca 674 comes with transport castors it is easy to move.

The seca 674 can be ordered with an optional Smartcard station (674 C). This innovative technology makes it possible to store and subtract the weights of various wheelchairs. Physicians and nursing staff will enjoy it, as they no longer need to subtract different wheelchair weights: Just slide the Smartcard into the display and it will show only the patients* weight.

Capacity: 300 kg (660lbs)
Graduations: 200 g (0.2lb)
TARE and Pre-TARE function
HOLD function
LCD-display
Mains (see below)

Capacity 300 kg (660lbs)
Graduations 100 g (0.2lb)
Dimensions (WxHxD) 970 x 800 x 45 mm (31 * x 2 1/8 x 38 *)
Weight 24 kg (52lbs)
Power supply mains / rechargeable battery (A/C UL adapter / rechargeable batteries)

Platform Scale

This model offers both rugged durability and a large, easy-to-read dial. Its design was based on a lower profile and a wider platform.

Capacity 320 lbs
Graduations 1 lb
Product Dimen. (HxWxD) 4 3/8'' x 12 1/2'' x 18 1/2''
Carton Dimensions 6'' x 13 1/4'' x 20 1/4''
Weight 8 1/2 lbs
Options Available in lbs / kg
Warranty 3 years

Portable Measuring Rod

Portable Measuring Rod

Portable Slider

The portable slider is a fast and easy infant measuring rod. It is made of anodized aluminum for long lasting accuracy and durability. The calipers conveniently fold in for transport or storage.

Measuring Range 0 * 39 in / 0 * 99 cm
Graduations 1/8 in / 1 mm
Product Dimen. (LxWxD) 41 1/8'' x 4 3/4'' x 11 1/4''
Carton Dimensions 42 3/8'' x 5 1/4'' x 1 5/8''
Weight 1 1/2 lbs
Warranty 1 year

Seca Analytics Work Stations

Seca Analytics Work Stations

Stadiometer

Stadiometer

Tape Measure W/ Wall Stop And Magnifier

The seca 206 rolls up to order: automatic metal tape measure for wall mounting. Order in CM or INCHES



Measuring range 0 * 220 (1''-78'' inches)
Graduations 1 mm (1/8'' inch)
Dimensions (WxHxD) 120 x 140 x 150 mm (5 7/8'' x 4 *'' x 1 3/8'')
Weight 135 g (1/2lb)

Telescopic Measuring Rod For Handrail Scales Scale

Telescopic measuring rod with large measurement range up to 90 inch / 230 cm. Extra-broad slide unit. Includes heel positioner for ideal three-point measurement. Developed for wall installation. Results are easy to read even for very tall patients. The rod is made of durable aluminum. Scratch-resistant scale made with a high-quality screen printing process. Telescopic measuring rod for handrail scales. This easy-to-fit measuring rod (fittings included) converts the handrail scale seca 644 into a real all-round talent. The determined height can be entered directly into the control unit of the seca 644 so that all relevant data is captured and used to determine the BMI. The seca 223 is available as a cm or cm/inch variety. Scales Not Included

The Color Big Dial Scale

What could be better than a Big Dial? how about a red, blue, yellow or classic white Big Dial. Each color comes with its own matching colored grooved rubber platform mat. Same rugged construction and great accuracy youve come to expect from seca Big Dials.

Features: seca 760
Rugged metal construction.
Red, blue, yellow or white
Capacity - 320 lbs.
Graduations- 1 lb.

Ultimate Baby Scale

The ultimate baby scale was specially designed for situations where the smallest weight fluctuation can be critical. From the integrated digital display to the unique tray design, this baby scale has it all. With the seca 231, the scale becomes a complete weighing and measuring station.

Capacity 44 lbs / 20 kg
Graduations 0.2 oz / 5 gm
Product Dimen. (HxWxD) 6 3/8'' x 12 1/4'' x 21 5/8''
Tray Dimensions 3 1/8'' x 9 1/4'' x 21 5/8''
Carton Dimensions 25 3/8'' x 16 1/2'' x 8 1/2''
Weight 15 lbs
Power supply 6 AA rechargeable batteries
A/C UL adapter/recharger
Warranty 1 year

Waist High Digitla Scales

Wall-mounted Stadiometer

Our fullength is a wall-mounted stadiometer that raises from floor length. Its made of sturdy anodized aluminum and comes with a footplate for increased stability. Weve incorporated an additional 4-inch head plate to ensure further accuracy. Since the seca 222 telescopes up to eye level, readings will become easier.

Measuring Range 12 * 90 1/2 in / 60 * 230 cm
Graduations 1/8 in / 1 mm
Product Dimen. (HxWxD) 52 1/8'' x 11 1/4'' x 2 1/8''
Carton Dimensions 2 1/2'' x 53'' x 1 3/4''
Weight 2 lbs
Warranty 1 year

Wheelchair Scales

Stable, functional and mobile: thanks to its generously sized platform and the robust railing, the seca 676 is ideal for diverse uses. For example, patients can be weighed sitting in a wheelchair or on a chair. Frail patients or patients who have difficulty walking have the possibility of using the railing as support. When no longer in use, the seca 676 can be folded together in no time at all, thus saving storage space. The firm locking device beteen the railing and platform ensures that the scale stands safely also when floded together, the railing serves as a handle- making it effortless to move and store away the seca 676 on the smooth running transport castors. The pre-Tare function with storage space for three additional weights such as that of wheelchairs guarantee the simple and reliable ascertainment of the net weight.