<< Ametek Deadweight Testers
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- Dual Range: 1-45 & 5-225 kg/cm2
- Accurate to ±0.05% of Indicated Pressure
- Integral Screw-Type Piston Pump
- Non-Magnetic, Die-Cast Alloy or Aluminum Weights
- Completely Self Contained in Anodized Aluminum Case
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Ametek HL-36 Shown
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The HydraLite Hydraulic Deadweight Tester is a primary standard that
features a re-entrant type measuring piston and cylinder assembly that
helps maintain accuracy as the test pressure increases. The HL Series
tester is designed for rapid interchanging between high and low pistons
and is NIST traceable and accurate to ±0.05% using non-magnetic die-cast
alloy or aluminum weights calibrated to international standard gravity
at 9.80665 m/s2. A compact screw pump with ratchet handle is
easy-to-use. The unit is also available as a deadweight gauge for
accurate measurements and use as a comparison standard.
The HL tester is an easy-to-use and portable primary standard capable of
offering laboratory accuracy in the field. The unit is designed to be
self-contained with all necessary components stored under the cover. A
screw pump pressure source on the tester model offers a convenient
method to raise and lower pressure for rapid testing. |
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Features |
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Functions |
Details |
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Re-entrant
piston/Cylinders |
The HL deadweight employs a re-entrant type
piston/cylinder assembly. This design applies test fluid to
the outside and inside of the cylinder. Unlike a simple
piston/cylinder, this configuration reduces clearance
between the piston and cylinder as pres-sure increases. This
reduces the rate of fluid leakage and increases float time,
offers the technician more time for testing, and reduces the
amount of pumping necessary to sustain the fluid loss. |
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Pressure Media |
Because the HL is manufactured using brass
and aluminum components, AAA Tester Oil is the recommended
and supplied pressure media. Other fluids compatible with
stainless steel, brass, aluminum, and Buna may be used;
however, consideration should be given to the cleanliness of
the fluid. AAA Tester Oil is triple-filtered to remove
suspended solids that can harm the piston/cylinder assembly. |
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Overhung Weight
Carriers |
Another feature of HL
deadweight tester is the way that the weights are positioned
on the carrier - an overhung weight carrier design. This
design employs a tube carrier that is positioned over the
column and onto the piston driver, which lowers the center
of gravity of the weights reducing side thrust and friction.
This design lengthens the life of the piston and cylinder
assembly thus improving measurement accuracy. |
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Overpressure protection |
The measuring piston assembly
features positive over-pressure protection restricting
vertical movement of the measuring piston by a piston cap.
This positive stop will prevent the piston from damage due
to accidental removal of the weights when pressurized. |
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Quick Setup
and Operation |
The setup for the HK tester
is completed by simply connecting two tubes,- one for the
supply and one for the unit-under-test, leveling the HK, and
adding the appropriate weights. Operation is fast and
efficient with no valves to adjust and no regulation needed
between set points. Pressure regulators are not required if
the air supply is within the tester’s operational
requirements. |
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Worldwide engineering units |
The HL deadweight tester and
HLG gauge can be manufactured in four different engineering
units: psi, bar, kg/cm2, and kPa. All of the different
engineering units are available in any of the
configurations. |
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HydraLite HLG Gauge |
The AMETEK HydraLite HLG
Gauge is a precision, portable instrument used to accurately
measure pressure in field conditions. The HydraLite HLG
gauge may be used as a primary standard instrument where a
high accuracy reference measurement is needed. Simply
connect the gauge to the process and add weights until there
is a proper float. Standard accuracy is ±0.1% of indicated
pressure traceable to the U.S. National Institute of
Standards and Technology (NIST). The instrument may also be
specified with +0.05% accuracy. If you initially need a
gauge and later find that you need a full tester, an
accessory kit is available to incorporate the screw pump
into the gauge. |
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Easy Leveling |
AMETEK floating ball testers
incorporate a bulls-eye level for reference when preparing
the unit for use. The tester also employs a 3-leg leveling
system which is more convenient and is superior to a 4-leg
system. |
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Specifications |
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Functions |
Details |
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Type |
Hydraulic, piston gauge |
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Pressure Range |
to 22,500 kPa / 3,000 psi (model dependent) |
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Accuracy (12 months) |
to ±0.050% rdg |
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Engineering Units |
psi, kg/cm2,
bar, kPa |
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Repeatability |
±0.005% rdg |
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Temperature coefficient |
±0.00167% of rdg/°C (@23°C) |
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Increments |
(low-min) |
0.1 psi, 0.005 kg/cm2, 5 mbar, 0.5 kPa |
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(high-min) |
0.5 psi, 0.025 kg/cm2, 25 mbar, 2.5 kPa |
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Gravity |
9.80665 m/s2 (international standard) or
Local gravity (specify when ordering) |
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Weight Sets |
Single (as ordered) |
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Piston/cylinders |
Single or dual, depending on model |
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Columns |
Single |
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Pressure Source |
Screwpump, hand-actuated, hydraulic pump
(tester models only) |
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Medium |
AAA oil |
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Reservoir capacity |
0.24 l /14.4 in3
(tester models only) |
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Wetting surfaces |
300 series stainless steel, brass,
aluminum |
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O-rings |
Buna N |
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Test Connections |
1/4” NPT and 1/2” NPT |
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Weight Material |
Hard, non-magnetic alloy and aluminum |
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Specifications |
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HL-36 |
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Basic model |
Dual piston/cylinder
assembly, imperial engineering units, ±0.100% accuracy,
standard accessories, NIST traceable certificate |
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Operating Range |
Increment |
Piston Area |
Weight Set |
Accuracy |
Gravity |
Data |
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10 to 200 psi |
0.1 psi |
0.05 in² |
3 |
±0.100% rdg (standard) |
Standard or local
gravity (specify) |
No |
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50 to 1,000 psi |
0.5 psi |
0.01 in² |
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HL-270M-1/C |
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Basic model |
Single piston/cylinder assembly, imperial
engineering units, 0.100% accuracy, standard accessories,
NIST traceable certificate |
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Operating Range |
Increment |
Piston Area |
Weight Set |
Accuracy |
Gravity |
Data |
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1 to 45 kg/cm² |
0.005 kg/cm² |
0.05 in² |
3M |
±0.100% rdg (standard) |
Standard or local
gravity (specify) |
Yes |
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5 to 225 kg/cm² |
0.025 kg/cm² |
0.01 in² |
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Ordering Information |
| Model |
Description |
Buy Online |
Price |
| HL36 |
Ametek HL36 Hydraulic Portable Deadweight Tester, 10 to 1000 psi |
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Sale $3,974.95
(Reg. $4,206.00) |
| HL270M |
Ametek HL-270-M-1/C Hydraulic Portable Deadweight Tester, 1 to 225 kg/cm2 |
Discontinued |
| Included Accessories |
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- 1 - Weight Set with Case
- 1 - Certificate of Calibration
- 1 - Case
- 1 - Instruction Manual
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Included |
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800-517-8431