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Calibration Equipment and Services
Meter Calibration Equipment
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Calibration Orifice Set (M5CO-SET)
US EPA allows critical orifices to be used as calibration
standards. Our orifice calibration set contains five critical
orifices with 1/2 inch quick connects and software. Recalibration
recommended annually.
Orifice Set Contains the following:
| Part
# |
Size |
Flow
Rate |
| M5CO-40 |
40 |
~.31cfm
(~8.8 lpm) |
| M5CO-48 |
48 |
~.46cfm
(~13.0 lpm) |
| M5CO-55 |
55 |
~.61cfm
(~17.3 lpm) |
| M5CO-63 |
63 |
~.79cfm
(~22.4 lpm) |
| M5CO-73 |
73 |
~1.1cfm
(~31.1 lpm) |
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Secondary Reference Meters
Includes 15 point calibration, valve, 5 foot hose and 1/2
inch quick connect for calibrating Method 5 source sampler
consoles. |
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DGM-110SR
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DGM-SK25SR |
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| Part # |
Description |
| DGM-110SR |
DGM Secondary Reference
Meter, English, with 15pt cal, valve 5 ft. hose, 1/2
QC |
| DGM-SK25SR |
DGM Secondary Reference
Meter, Kimmon SK25, Metric, High flow, with 15pt cal,
valve 5 ft. hose, 1/2 QC |
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Precision Wet Test Meter

Click on image
to view or download Shinagawa
data sheet.
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Normally considered the best standard for calibration of
dry gas meters. Different models available.
| Part # |
Description |
| W-NK-0.5A |
Shinagawa Precision Wet
Test Meter, Max Flow 5 lpm.,0.5 liter per Revolution |
| W-NK-2.5A |
Shinagawa
Precision Wet Test Meter, Max Flow 25 lpm., 5 liter
per Revolution |
| W-NK-5A |
Shinagawa Precision Wet
Test Meter, Max Flow 50 lpm., 5 liter per Revolution |
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| AL 19 |
American Wet Test Meter,
Max Flow 64 cfh, 1cf per Revolution |
| AL 20 |
American Wet Test Meter,
Max Flow 120 cfh, 1cf per Revolution |
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Meter Calibration Services
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Apex Instruments performs both pre-test (calibration prior
to use) and post-test (calibration after use) calibrations
using a wet test meter.
| Part # |
Description |
| DGR-2VER |
Verification of DGM for
Secondary Reference, 2 Point Verification of Previous
Calibration |
| DGMC-5A |
Pre-Test 5 Point Calibration
of Apex Compatible Source Sampler Consoles |
| DGMC-3A |
Post-Test 3 Point Calibration
of Apex Compatible Source Sampler Consoles |
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Calibration services are
available from Apex Instruments on a fee per console basis.
All console and dry gas meter calibrations are conducted
in accordance with US EPA standards.
Apex Instruments calibrates source sampler consoles,
reference dry gas meters, orifices and pitots. |
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Pitot Calibration Equipment
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Level Indicator (M5C-1)
Pendulum style Inclinometer with magnetic base for calibration
of type S pitots and measure of cyclonic flow
measurement. |
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Bull's Eye Level (M5C-2)
Bulls Eye Level is 1/2 inch diameter and used for
pitot calibrations. Comes with thumb screws for clamping
to pitot. |
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Dial Calipers
Used for measuring nozzle diameter and inspection of pitots.
| Part # |
Description |
| M5C-3 |
English units, 0-6 inch,
.001 inch increments |
| M5C-3M |
Metric units, 0-150mm,
.02 mm increments |
| M5C-3D |
Electronic, Eng/Metric
units, 0-6 inch/150mm Direct Inch/Metric conversion |
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Pitot Calibration Services
| Part # |
Description |
| PT-CAL-G |
Geometric Calibration for Type
S Pitot Tubes to Method 2 |
| PT-CAL-W |
Wind Tunnel Calibration for
Type S Pitot Tubes to Method 2 |
| PT-CAL-3D |
Wind Tunnel Calibration for
3-D Pitot |
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Thermocouple Simulator

Click on image
to view or download data sheet.
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Convenient for checking accuracy of temperature displays
and controllers. Cold junction compensated, calibrates without
external compensators or icebaths. This simulator source
is designed for type K thermocouples and has 22 precise
test points.
| Part # |
Description |
| M5C-22 |
Temperature Range 0 to
2100ºF |
| M5C-22-C |
Temperature Range 50
to 1000ºF |
Comes with certificate of calibration traceable to NIST. |
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Flow Calibrator/Piston Prover
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The Bios Defender 510 & 520 Series is the next generation of DryCal® technology. It’s the proven reliable foundation of all Bios primary standards, and the basis of our ISO 17025 accreditation by NVLAP of NIST. |
Features:
Reliable
15 years of proven DryCal® performance
Accuarte
Backed by ISO 17025; NVLAP accredited
Portable
Lightweight and impact-resistant
Simple
Quick Start operation and no messy soap solutions
Streamlined
Bios optimizer software transfers calibration data directly to any windows based PC using built in serial port |
| Parts # |
Description |
| 200-510L |
LOW FLOW RANGE, 5mL-500mL/MIN, +/- 1% OF READING VOLUMETRIC |
| 200-510M |
MEDIUM FLOW RANGE, 50mL-5,000mL/MIN, +/- 1% OF READING VOLUMETRIC |
| 200-510H |
HIGH FLOW RANGE, 300mL-30,000mL/MIN, +/- 1% OF READING VOLUMETRIC |
| 200-520L |
LOW FLOW RANGE, 5mL-500mL/MIN, +/- 1% OF READING VOLUMETRIC, INCLUDES TEMPERATURE AND PRESSURE RECORDINGS |
| 200-520M |
MEDIUM FLOW RANGE, 50mL-5,000mL/MIN, +/- 1% OF READING VOLUMETRIC, INCLUDES TEMPERATURE AND PRESSURE RECORDINGS |
| 200-520H |
HIGH FLOW RANGE, 300mL-30,000mL/MIN, +/- 1% OF READING VOLUMETRIC, INCLUDES TEMPERATURE AND PRESSURE RECORDINGS |
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