AMETEK Crystal m1 is a reliable digital pressure gauge designed to replace conventional mechanical pressure gauges in industrial, maintenance and calibration applications. Combining ±0.2% of reading accuracy, a rugged portable design, large backlit display and exceptionally long battery life, the m1 provides an economical solution for accurate pressure measurement in the laboratory and in the field.
Unlike conventional mechanical gauges whose accuracy is commonly specified as a percentage of full scale, the AMETEK Crystal m1 provides an accuracy specification based primarily on the actual pressure reading. This allows one wide-range digital gauge to replace several conventional mechanical gauges while maintaining useful measurement performance over a broad part of its pressure range.
The m1 is available in multiple pressure ranges extending from low-pressure applications up to 10,000 psi / 700 bar. All models can indicate vacuum, while dedicated low-pressure models provide specified vacuum performance.
A major advantage of the m1 is its wide compensated operating temperature range. The pressure specification is maintained from -10 °C to +50 °C, making the gauge suitable for both controlled laboratory environments and demanding industrial applications.
The AMETEK Crystal m1 also offers a 2-year recommended calibration interval, battery life of up to approximately 3 years depending on the selected measurement interval, a bright backlight and large numerical display.
At europascal, the AMETEK Crystal m1 can be combined with suitable pneumatic and hydraulic pressure generation equipment to create a practical pressure measurement and calibration system. For professional calibration and metrological traceability, visit the europascal Calibration Service.
Your Benefits at a Glance
The AMETEK Crystal m1 provides an economical combination of accuracy, durability and simple operation for professional pressure measurement.
Key advantages include:
- Digital pressure gauge for industrial and calibration applications
- Accuracy of ±0.2% of reading over most of the measurement range
- Pressure ranges up to 10,000 psi / 700 bar
- Vacuum indication
- Wide compensated temperature range
- Full specified performance from -10 °C to +50 °C
- 2-year recommended calibration interval
- Large 5-digit LCD
- 16.8 mm high numerical display
- Bright backlight
- Four readings per second
- Long battery life
- Extended battery modes available
- Powered by two standard AA batteries
- Rugged protective boot included
- Replaceable CPF pressure adapter
- Optional BSP and M20 × 1.5 adapters
- Compatible with pneumatic hand pumps
- Compatible with hydraulic hand pumps
- Compatible with bench pressure generators
- Suitable as a replacement for mechanical pressure gauges
- Designed for laboratory and field use
±0.2% of Reading Accuracy
The AMETEK Crystal m1 provides an accuracy specification based primarily on the measured value rather than exclusively on the full-scale pressure range.
For pressures from:
20% to 110% of range
the m1 specification is:
±0.2% of reading.
From:
0% to 20% of range
the specification is:
±0.04% of full scale.
This combination allows the instrument to maintain useful measurement performance over a broad pressure range.
The accuracy specification includes the effects of:
- Linearity
- Hysteresis
- Repeatability
- Temperature
- Stability
over the recommended two-year calibration interval.
One Digital Gauge Can Replace Multiple Mechanical Gauges
A conventional mechanical pressure gauge is frequently specified as a percentage of its full-scale value.
As the applied pressure decreases, the relative uncertainty of such a gauge therefore increases.
The AMETEK Crystal m1 uses a reading-based accuracy specification over most of its range.
AMETEK states that one wide-range m1 can replace up to:
five 0.25% mechanical pressure gauges.
This can reduce the number of pressure gauges required for routine service and maintenance applications.
Pressure Ranges up to 700 bar
The AMETEK Crystal m1 is available in multiple pressure ranges.
Metric versions include ranges such as:
- 2 bar
- 10 bar
- 20 bar
- 100 bar
- 200 bar
- 700 bar
Corresponding psi versions include:
- 30 psi
- 100 psi
- 300 psi
- 1,000 psi
- 3,000 psi
- 10,000 psi
MPa versions are also available.
This broad range selection makes the m1 suitable for applications from low pneumatic pressures to high hydraulic pressures.
Vacuum Measurement
All AMETEK Crystal m1 models can indicate vacuum.
Specified vacuum performance applies to selected lower-pressure models.
For vacuum measurement, AMETEK specifies:
±0.25% of full scale
with the corresponding vacuum full scale defined according to the selected engineering unit.
For applications involving continuous high vacuum, a dedicated vacuum-capable pressure instrument should be considered according to the manufacturer’s recommendations.
Wide Operating Temperature Range
The AMETEK Crystal m1 is designed to maintain its specified measurement performance over an operating temperature range of:
-10 °C to +50 °C.
AMETEK specifies no additional accuracy change across this operating temperature range when the instrument is correctly zeroed.
This is particularly useful for field applications.
A digital pressure gauge may be calibrated under controlled laboratory conditions but subsequently used outdoors or in industrial environments with significantly different ambient temperatures.
The m1 is designed to minimize the effect of these temperature changes on pressure measurement accuracy.
Rugged Industrial Design
The AMETEK Crystal m1 is designed for everyday industrial use.
According to AMETEK, the instrument is engineered so that its measurement accuracy is resistant to common influences including:
- Mechanical shock
- Overpressure
- Vibration
- Temperature changes
- Rapid pressure changes
A protective elastomeric boot is supplied with the instrument.
This helps protect the gauge against the mechanical stresses commonly encountered during field service and maintenance work.
Large Backlit Display
The AMETEK Crystal m1 uses a:
5-digit LCD.
The numerical characters are approximately:
16.8 mm / 0.66 inches high.
The large characters make pressure values easy to read from a practical working distance.
A bright backlight improves readability in poorly illuminated environments.
The LCD is also designed to remain readable in sunlight.
Four Readings per Second
The standard display update rate is:
4 readings per second.
This provides responsive pressure indication during adjustment of pneumatic and hydraulic pressure sources.
The fast display response is particularly useful when approaching a required pressure calibration point.
Long Battery Life
The AMETEK Crystal m1 operates from:
2 × AA alkaline batteries.
Typical continuous operation at the standard measurement rate is approximately:
900 hours.
The instrument also provides selectable extended battery modes.
Depending on the selected measurement interval, operating times can be extended substantially.
For example, slower measurement intervals can provide operating times of several thousand hours.
At the longest selectable intervals, AMETEK specifies battery life approaching:
30,000 hours.
This corresponds to approximately three years of operation under suitable usage conditions.
Two-Year Recommended Calibration Interval
AMETEK specifies a recommended calibration interval of:
2 years
for the Crystal m1.
The pressure accuracy specification includes stability over this period.
A longer calibration interval can reduce maintenance effort and operating costs compared with instruments requiring annual calibration, provided that the calibration interval is appropriate for the user’s quality system, application and historical stability data.
CPF Pressure Connection
The AMETEK Crystal m1 uses the Crystal:
CPF – Crystal Pressure Fitting
system.
The standard pressure connection incorporates a:
7/16-20 MP CPF port.
One advantage of this design is that normal connection wear can be transferred to a replaceable adapter rather than directly affecting the pressure gauge body.
This can extend the practical service life of the instrument.
Replaceable Pressure Adapter
AMETEK specifically highlights the replaceable CPF adapter as a durability feature of the m1.
Pressure gauges used regularly in calibration and maintenance applications may be connected and disconnected hundreds or thousands of times.
Thread wear can therefore become an important long-term consideration.
With the m1, the adapter can be replaced when required rather than replacing the complete pressure gauge.
Optional BSP Connection
For applications using European pressure fittings, the m1 is available with an optional:
G 1/4 B parallel pressure fitting.
This makes the gauge easier to integrate into existing European pneumatic and hydraulic systems.
A corresponding copper sealing washer is also available.
Optional M20 × 1.5 Adapter
An optional:
M20 × 1.5 male CPF adapter
is also available.
This connection is frequently encountered on pressure calibration equipment and industrial pressure instruments.
The adapter system allows the m1 to be configured for different laboratory and field connection standards.
Pressure Gauge Calibration
The AMETEK Crystal m1 can be used as a digital pressure indicator in comparison pressure measurement applications.
A typical setup consists of:
Pressure Source → Reference Gauge + Device Under Test
A suitable pneumatic or hydraulic pressure source generates the required test pressure.
The pressure indication can then be compared with the instrument under test.
The suitability of the m1 as a reference should always be evaluated according to the required test uncertainty ratio and the measurement uncertainty of the complete calibration system.
Pneumatic Pressure Applications
For lower pressure ranges, the AMETEK Crystal m1 can be combined with pneumatic hand pumps.
AMETEK offers several compatible systems.
Examples include:
T-960
for pressures up to approximately:
30 psi / 2 bar
and:
T-970
for pressures up to approximately:
580 psi / 40 bar.
Vacuum and pressure applications can be covered using pumps such as the:
T-965
and:
T-975.
This creates a portable pressure test system for field service applications.
Hydraulic Pressure Applications
For higher pressure ranges, the m1 can be combined with hydraulic pressure pumps.
Compatible AMETEK systems include pressure sources for ranges such as:
3,000 psi / 200 bar
and:
5,000 psi / 350 bar.
For the highest m1 pressure range of:
10,000 psi / 700 bar
a suitably rated hydraulic pressure source can be used.
This allows the m1 platform to cover both pneumatic and hydraulic pressure measurement applications.
Complete Pressure Systems
AMETEK offers the Crystal m1 as part of complete pressure system configurations.
Depending on the selected system, a package can combine:
- m1 digital pressure gauge
- Pneumatic or hydraulic pressure pump
- Pressure fittings
- Connection accessories
- Carrying case
This provides a convenient portable solution for maintenance and pressure testing.
Protective Boot
A protective boot is included with the AMETEK Crystal m1.
The boot is manufactured from a Skydrol-compatible elastomeric material and increases resistance to mechanical shock.
This is particularly useful for portable field applications where instruments are regularly transported and handled.
Carrying Cases
Several carrying cases are available for the m1.
These include a compact hard carrying case with protective foam as well as a larger weatherproof hard case.
A suitable carrying case protects the instrument, fittings and accessories during transport between calibration locations.
Magnetic Hanging Strap
An optional:
magnetic hanging strap
is available for the AMETEK Crystal m1.
This accessory allows the gauge to be positioned on suitable metallic surfaces during field work.
It can be particularly useful when both hands are required to operate a pressure pump or adjust the device under test.
Pressure Units
The AMETEK Crystal m1 is available in different engineering-unit configurations.
Depending on model, these include versions based on:
- psi
- bar
- MPa
- kgf/cm²
This allows the gauge to be selected according to the pressure units normally used in the application.
Technical Highlights
| Feature | AMETEK Crystal m1 |
|---|---|
| Product type | Digital Pressure Gauge |
| Accuracy, 20–110% range | ±0.2% of reading |
| Accuracy, 0–20% range | ±0.04% FS |
| Vacuum accuracy | ±0.25% FS on specified ranges |
| Maximum pressure range | 10,000 psi / 700 bar |
| Operating temperature | -10 °C to +50 °C |
| Recommended calibration interval | 2 years |
| Display | 5-digit LCD |
| Digit height | 16.8 mm / 0.66 in |
| Standard update rate | 4 readings/s |
| Power supply | 2 × AA alkaline batteries |
| Typical continuous battery life | Approx. 900 hours |
| Extended battery life | Up to approx. 30,000 hours |
| Standard connection | 7/16-20 MP CPF |
| Optional connection | G 1/4 B |
| Optional connection | M20 × 1.5 |
| Protective boot | Included |
| Mechanical gauge replacement | Up to five 0.25% gauges |
| Application | Industrial and calibration pressure measurement |
AMETEK Crystal m1 vs. XP2i
The AMETEK Crystal m1 and Crystal XP2i are both digital pressure gauges, but they address different measurement requirements.
The m1 focuses on:
- Economical pressure measurement
- ±0.2% of reading accuracy
- Simple operation
- Long battery life
- Routine industrial pressure measurement
- Replacement of mechanical gauges
The XP2i provides higher measurement performance with accuracy options down to:
±0.1% of reading
and is available for pressures up to:
15,000 psi.
The XP2i is also available with intrinsic safety approval for hazardous-area pressure measurement.
The appropriate instrument therefore depends on the required measurement uncertainty, pressure range and application environment.
AMETEK Crystal m1 vs. HPC
The AMETEK Crystal m1 should also be distinguished from the AMETEK Crystal HPC pressure calibrators.
The:
m1
is primarily a:
Digital Pressure Gauge.
The:
HPC
is a multifunction:
Handheld Pressure Calibrator.
HPC instruments provide substantially higher measurement performance and additional electrical and temperature calibration functions.
The m1 is therefore particularly suitable when straightforward, reliable digital pressure measurement is required without the additional functionality of a multifunction process calibrator.
Typical Applications
The AMETEK Crystal m1 is suitable for:
- Digital pressure measurement
- Replacement of mechanical pressure gauges
- Pressure gauge testing
- Routine pressure checks
- Pneumatic pressure measurement
- Hydraulic pressure measurement
- Pressure system maintenance
- Pump testing
- Compressor testing
- Process pressure monitoring
- Industrial maintenance
- Field service
- Laboratory applications
- Pressure comparison measurements
- Pressure system troubleshooting
- Production testing
- Hydraulic service
- Pneumatic service
Why Choose the AMETEK Crystal m1?
The AMETEK Crystal m1 provides a practical combination of accuracy, ruggedness and economy for professional pressure measurement.
Its ±0.2% of reading specification over most of the measurement range allows a single m1 to replace several conventional full-scale-based mechanical pressure gauges.
Available pressure ranges extend up to 10,000 psi / 700 bar, enabling applications from low-pressure pneumatic systems through high-pressure hydraulic measurement.
The specified performance is maintained from -10 °C to +50 °C, making the instrument suitable for both laboratory and field environments.
A large backlit display, simple operation and long battery life make the m1 particularly convenient for routine maintenance and pressure testing.
The recommended 2-year calibration interval helps reduce maintenance requirements, while the replaceable CPF pressure adapter protects the gauge itself against connection wear.
Optional G 1/4 B and M20 × 1.5 adapters simplify integration into different pressure systems.
Combined with suitable AMETEK pneumatic or hydraulic pressure generation equipment, the Crystal m1 can form part of a complete portable pressure test system.
At europascal, we provide AMETEK Calibration and Crystal pressure measurement equipment for professional laboratory, service and industrial applications.
For professional calibration and metrological traceability, visit the europascal Calibration Service.
Further products from AMETEK Calibration are available from europascal.
Manufacturer information about the AMETEK Crystal m1 is available on the official AMETEK Calibration website.
