Modus Instruments T Operating Manual
Amphenol
Advanced Sensors
Series T
Differential Pressure
Transmitters
The Modus Series T family of differential
pressure transmitters measure low pressures
and feature low power consumption and
a variety of analog signal outputs. A wide
selection of standard pressure ranges and
electrical ratings is available.
These transmitters feature: no moving parts to
wear out, reliable long term stability, and are
virtually position insensitive.
The Series T Transmitters are an excellent
choice for many HVAC, process and
automation monitoring requirements.
These transmitters monitor: lter differential
pressures, fan static pressures, clean room
pressures, variable air volume systems and
velocity pressures. They have been used for
bubbler level systems, leak detection and in
medical and analytical instruments.
The transmitters are housed in a ame
retardant, glass-reinforced polyphenylene oxide
(NORYL™) case. Electrical connections are
made by means of a 3/8 in terminal strip with
#6 screws.
The Series T includes three models: Model
T10, Model T20, and Model T30. These three
models incorporate a variety of power and
signal options.
The span or zero adjustment is performed with
a 20-turn potentiometer for ne resolution.
T10 Three-wire
DC Voltage In
DC Voltage Out
T20 Four-wire
24, 120, or 240 VAC In
DC Voltage Out
T30 Two-wire
DC Voltage In
4 to 20 mA Out
The piezoresistive sensor is a solid state device
designed in a Wheatstone bridge conguration.
When pressure is applied to the device, the
resistance of the bridge changes by a small
amount. This resistance change is converted to
a voltage and amplied.
Series T Specications
General
• Measures differential, gage pressure, or vacuum
• Suitable for air or inert gases
• Maximum safe momentary overpressure: see
reference table A
Performance
Accuracy
± 1% of span (including non-linearity and hysteresis)
Calibration
(Traceable to NIST)
Environmental
Operating Temperature Range
32°F to 115°F (0°C to 45°C)
Storage Temperature
-20°F to 160°F (-30°C to 70°C)
Effect of Temperature
• on zero: ±0.05%/°C
• on span: ±0.02%/°C
Operating Humidity Range
10% to 90% RH
non-condensing
Shock Resistance
10 G (11 ms)
Vibration Resistance
5 G to 50 Hz
Electrical Connections
Connections
External 3/8 in terminal strip with #6 screws
Physical
Pressure Port Connections
3/16 in diameter suitable for:
• 1/8 in ID Tygon™ or polyurethane tubing
0.11 in to 0.15 in (3 mm to 4 mm)
• 1/4 in OD polyethylene tubing (6 mm)
Integral lters at both ports
Dimensions (W x L x H)
3.00 in x 5.15 in x 1.40 in
(76 mm x 131 mm x 36 mm)
Material
Flame retardant, glass-reinforced polyphenylene
oxide (NORYL) case
Weight
0.42 lbs (190 g) maximum
2
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