PRESSURE
SENSORS
5266 Very Low Range Differential Pressure Transmitter
24 VAC/DC Excitation
Excellent long term stability
Easy to install
Voltage or 4-20mA two wire output
Gems 5266 low range pressure transmitter measures gauge or differential pressure
by means of a stainless steel diaphragm, and capacitive sensor. The model 5266
incorporates an ASIC to provide a temperature compensated high level analogue out
put over the temperature range -18 to +65°C. Mounted in a glass filled polyester
case with pipe fittings the 5266 can measure pressures in the range 100 - 5000
pascals.
The 5266 utilises an all stainless steel microtig welded sensor. The tensioned
stainless steel diaphragm and insulated stainless steel electrode, positioned close
the diaphragm, form a variable capacitor. Positive pressure moves the diaphragm
toward the electrode, increasing the capacitance.
A decrease in pressure moves the diaphragm away from the electrode, decreasing
the capacitance. The change in capacitance is detected and converted to a linear DC
electrical signal by Gems’ unique electronic circuit.
The micro-tig welded tension sensor allows up to 69kPa overpressure (in either
direction) with no damage to the unit. In addition, the sensor parts have thermally
matched coefficients, which promote improved temperature performance and
excellent long-term stability
PRESSURE TRANSDUCERS
ECONOMICAL
www.gemssensors.com
Specifications
Input
Pressure Range
Proof Pressure
Unidirectional 0-100 Pascals to 0 to 5000 Pascals
Bi-directional ± 50 Pascals to ±2500 Pascals
100 and 250kPa range
14kPa
500 Pascal range
35kPa
1000 to 5000 Pascal range
69kPa
69kPa max.
0.5%/a
±1% F.S.
±5% F.S.
-18 to 65°C
-18 to 65°C
±1% F.S. (10V output ±0.5%)
±1% F.S. (10V output ±0.5%)
6.2mm
Compatible with air or non-conductive gases
Via terminal strip
Fire retardant glass filled polyester
CE
150grams
Applications
Heating, Ventilating and Air Conditioning (HVAC)
Energy Management Systems
Variable Air Volumes and Fan Control (VAV)
Environmental Pollution Control
Static Duct and Clean Room Pressures
Fume Hood Control
Oven Pressurisation and Furnace Draft Controls
Line Pressure
Performance
Long Term Drift
Accuracy
Thermal Error
Compensated Temperature
Operable Temperature
Zero Tolerance
Span Tolerance
Mechanical Construction
Pressure Ports
Wetted Parts
Electrical Connection
Enclosure
Housing
Approvals
Weight
Individual Specifications
Voltage Output units
Supply Voltage
Output
Output Impedance
Current Output Unit
Supply Voltage (Vs)
Output
Loop Resistance
5V output 9 to 30 Vdc/a.c
10V output 12 to 30Vdc/a.c
0 to 5Vdc, 0 to 10Vdc
For bi-directional ranges output at zero pressure 2.5V and 5Vdc
respectively
1000 ohms
24Vdc
4-20mA two wire for bi-directional ranges output at 0 pressure
12mA
(Vs-9) x 50 ohms
Indicators and Accessories Pages 64-69
44
MCU
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