Low Differential Pressure Sensor | Dry/Dry

At a Glance

Ranges: 0-0.25mbar up to 0-1000mbar
Outputs: 4-20mA
Line / Common Mode Pressure: 2bar max. (range dependent)
Accuracy: <±0.25%/FS
Optional ATEX Intrinsically Safe Version (5mbar and above only)

Ideal For Dry/Dry Measurements at Very Low Pressures
Save Time With User Span and Zero Adjustments – No need to send in your pressure sensor for minor adjustments.
ATEX Certified Explosive Atmosphere Versions Available
Ideal for HVAC, Clean-Room and Flow Measurement Applications
Fully Temperature Compensated for Higher Stability at Low Pressures

Description

The PR3202 low differential pressure sensor is designed to measure dry, air and non-corrosive gases across range of general purpose and industrial applications such as HVAC, clean room monitoring and flow measurement applications.

The PR3202 low differential pressure transmitter utilises a highly stable sensing element, allowing its 4-20mA output to be factory-scaled over measuring ranges as small as 0-0.25mbar (0-25 Pascals). They are also fully temperature-compensated for unrivalled stability at very low pressure.

In addition to air differential pressure, the PR3202 can also measure gauge and vacuum/suction pressure, it can also operate bi-directionally giving the ability to measure compound differential air pressure ranges that range from vacuum to positive pressure.

The process connection on the PR3202 air differential pressure sensor is made via hose fittings which cater for common mode/line pressures of up to 10bar.

Technical Specifications

Input Pressure Range
Nominal Pressure Range	mbar	5	10	20	30	50	80	100	250	500	1000
Permissible Overpressure	mbar	25	25	200	200	200	200	200	1200	1200	1200
Max Common Mode Pressure / Static Line Pressure	mbar	375	375	2000	2000	2000	2000	2000	2000	2000	2000

Output signal & supply voltage	Number of Wires	Output	Supply Voltage	Supply Current
PR3202	2 – wire	4 - 20mA	13 - 36Vdc	n/a
PR3202X (ATEX version)	2 - wire	4 - 20mA	13 - 28Vdc	n/a
PR3202V5	3 - wire	0 - 5Vdc	13 - 30Vdc	13mA
PR3202V10	3 - wire	0 - 10Vdc	13 - 30Vdc	13mA

Performance
Accuracy (non-linearity, hysteresis, repeatability)	% Full Scale Output	<±0.30 (BFSL)
Zero Offset and Span Tolerance	% Span	±1
Zero Offset and Span Adjustment	% Full Scale Output	±5 with easy access trimming potentiometer
Media Temperature	˚C	-20 to +70
Ambient Temperature	˚C	-20 to +70
Storage Temperature	˚C	+5 to +40
Thermal Zero Shift (TZS)	% / Full Scale / ˚C	<±0.04
Thermal Span Shift (TSS)	% / Full Scale / ˚C	<±0.04
Reverse Polarity Protection		Protected against supply voltage reversal up to 50Vdc
Media Compatibility		Dry non-corrosive gas only
Weight	Grams	280 for standard unit
Insulation Resistance	Megohm @ 50 Vdc	>100
Electrical Connection:	Screw terminals for conductor sizes 0.2-2.0mm2 are located beneath the enclosure lid. Cable entry is through an IP66 cable gland with compression seal for cable sizes 4-8mm. Optional M20 conduit fitting available.
Pressure Connection:	4mm I.D. hose (others on request)
Response Time (10% - 90%)	ms	≤10
Environmental Protection:		IP65
Load Driving Capability	4 - 20mA version	Supply voltage - 10V / 0.02A (i.e. 36V - 10V / 0.02A = 1300Ω
	0 - 5V / 0 - 10V versions	>5kΩ / >10kΩ
Long Term Stability	% / Full Scale	< 0.2 / 6 months
Operational Life	Pressure Cycles	> 10⁸ typical
ATEX Approval (4-20mA versions only)		Ex II 1 G Ex ia IIC T4 Ga (zone 0)
		Ex II 1 D Ex ia IIIC T135°C Da (zone 20)
		EX I M 1 Ex ia I Ma (group I M1)

Product Dimensions

PR3202 Low Differential Pressure Sensor Outline

Wiring Details

Pin No.	2 Wire (4 - 20mA)	3 Wire (0 - 5Vdc / 0 - 10Vdc)
1	+ve supply	-ve supply / 0V common
2	4 - 20mA signal	+ve supply
3	earth/case	output signal

Ordering Codes & Options

PR3202X-1000mbar-AA-00-000 (example code)	PR3202	X	-	1000mbar	-	A	A	-	00	-	000

Product Family
PR3202	PR3202

Electrical Output
Blank = 4-20mA (2-wire)		Blank
X = 4-20mA ATEX Certified (2-wire)		X
V5 = 0-5Vdc (3-wire)		V5
V10 = 0-10Vdc (3-wire)		V10

Electrical Connection
Blank = Cable Gland (suits 4-8mm diameter cable)

Pressure Range
1000mbar = 0 to 1000mbar differential			-	1000mbar
10psi = 0 to 10psi differential			-	10psi
M500P500mbar = -500 to +500mbar differential			-	M500P500mbar

Process Connection
A = Male Hose Barb Fittings (suit 4mm ID hose)					-	A
B = 1/4” BSP Male Threaded Connection*					-	B

Housing Type
A = Standard							A
B = Aluminium*							B

Cable Length
00 = None								-	00
01 = 1 metre								-	01

Specials Code
000 = No Special Requirements										-	000
*1/4" BSP male connections are only available with the aluminium case option.

Published Sensor Application Articles

Below is a published sensor application paper that shows you how the low differential pressure sensor could be used in a specific application. See our published sensor application articles page for many more.

Inhalation characteristics of asthma patients, COPD patients and healthy volunteers with the Spiromax® and Turbuhaler® devices: a randomised, cross-over study

By Wahida Azouz, Philip Chetcuti, Harold Hosker, Dinesh Saralaya and Henry Chrystyn. BMC Pulmonary Medicine 2015 15:47. Available under a Creative Commons Attribution 4.0 International license.