DPT-20

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WIKA · Pressure measurement · Family DPT

Differential pressure transmitter

Name: Differential pressure transmitter
Brand: WIKA
SKU: DPT

Differential pressure transmitter with high accuracy and multiple output signals, suitable for industrial applications including process, chemical, and petrochemical industries.

Range

-16…16 bar

Output

4-20 mA · 4-20 mA HART

Accuracy

See specifications by range

Protection

IP65

CENACEintrinsic safetyflameproof enclosure

Price

On request

Depends on configuration

Request a quote

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Description

The model DPT-20, with its 4 ... 20 mA, 4 ... 20 mA HART ® , FOUNDATION™ Fieldbus or PROFIBUS ® PA output signals, combined with the intrinsic safety or flameproof enclosure ignition protection type, is ideally suited for application in appropriate systems. The development of the transmitter in accordance with the demands of SIL (Safety Integrated Level) IEC 61508 also makes it applicable for plants with special safety requirements.

Special features

High measurement accuracy
Freely scalable measuring ranges
Developed in accordance with the SIL 2 requirements
Seven different case variants
Configuration via DTM (Device Type Manager) in accordance with the FDT (Field Device Tool) concept (e.g. PACTware™)

Identification

Model	DPT-20
Product family	DPT
Subcategory	Differential pressure transmitter

Measuring range

Pressure ranges

-0.01…0.01 bar · -0.03…0.03 bar · -0.1…0.1 bar · -0.5…0.5 bar · -3…3 bar · -16…16 bar · -0.15…0.15 psi · -1.5…1.5 psi · -7.5…7.5 psi · -45…45 psi · -240…240 psi

Accuracy

Accuracy class	See specifications by range
Accuracy standard	IEC 62828, IEC 61298
Safety integrity level (SIL)	SIL 2 (IEC 61508)

Process conditions

Process connection	½ NPT¼ NPTG 1/2M20x1.5
Process temperature	−40…+85 °C

Electrical characteristics

Output signal	4-20 mA · 4-20 mA HART · FOUNDATION™ Fieldbus · PROFIBUS® PA
Power supply	10...30 V DC
Electrical connection	M20 x 1.5

Materials

Case material	plastic, aluminium, stainless steel (316L)
Wetted parts material	316L, Hastelloy
Sealing material	FKM, EPDM, FPM, NBR

Operating environment

Ambient temperature	−40…+85 °C
IP rating	IP65
Weight	1.5 kg

Certifications and approvals

Certifications	CENACE
Explosion protection	intrinsic safetyflameproof enclosure

Additional details

Datasheet languages

EN, DE, ES, FR

Tables from datasheet

Accuracy specifications

Measuring deviation determined using the limit point method IEC 62828/IEC 61298 1)
Differential pressure	Measuring ranges 10 and 30 mbar [0.15 and 0.45 psi]	■ TD ≤ 5:1 ±0.1 %of span ■ TD > 5:1 ±0.02%xTD
Measuring range 100 and 500 mbar [1.5 and 7.5 psi]	■ ToTD 10:1 ±0.065 %of span ■ TD > 10:1 ±0.035 %+0.01%xTD
Measuring range 3 bar [45 psi]	■ ToTD 10:1 ±0.065 %of span ■ >TD 10:1 ±0.015 %+0.005%xTD
Measuring range 16 bar [240 psi]	■ ToTD 10:1 ±0.065 %of span ■ >TD 10:1 ±0.035 %+0.01%xTD
Static pressure	< ±0.1 %(scaling with static pressure is not possible)
Adjustability, differential pressure
Pressure value of zero point	-120 ...+120 %of the nominal measuring range (with -100 ...+100 mbar [-1.5 ... +1.5 psi] measuring range, 100 mbar [1.5 psi] is the nominal measuring range)
Pressure value of span	Zero point + (-240 …+240 %)
Adjustability, level
Percentage value	-10…+100%
Pressure value	-120…+120%
Adjustability, flow
Pressure value of zero point	-120…+120%
Pressure value of span	-120…+120%
Influence of mounting position	< 0.35 mbar [0.003 psi] per 10° inclination from the vertical
Influence of the medium and ambient temperature
-10 ...+60 °C [14 ... 140 °F]	Measuring range 10 mbar [0.15 psi]	< ±0.15%+0.2%xTD
Measuring range 30 mbar [ 0.45 psi]	< ±0.15%+0.1%xTD
Measuring range 100 mbar [1.5 psi]	< ±0.15 %+0.15%xTD
Measuring range 500 mbar [7.5 psi]	< ±0.15 %+0.05%xTD
Measuring range 3 bar [45 psi]	< ±0.15 %+0.05%xTD
Measuring range 16 bar [240 psi]	< ±0.15 %+0.15%xTD
-40 …-10 °C [-40 ...+14 °F] / 60 …85°C[140 ... 185 °F]	Measuring range 10 mbar [0.15 psi]	< ±0.4%+0.3%xTD
Measuring range 30 mbar [ 0.45 psi]	< ±0.2 %+0.15%xTD
Measuring range 100 mbar [1.5 psi]	< ±0.15%+0.2%xTD
Measuring range 500 mbar [7.5 psi]	< ±0.2 %+0.06%xTD
Measuring range 3 bar [45 psi]	< ±0.2 %+0.06%xTD
Measuring range 16 bar [240 psi]	< ±0.15%+0.2%xTD
Long-term stability
Differential pressure	■ < 0.065 %xTD(1 year) ■ < 0.1 %xTD(5 years) ■ < 0.15 %xTD(10 years)
Static pressure	■ < ±0.065 %(1 year) ■ < ±0.1 %(5 years) ■ < ±0.15 %(10 years)
Thermal change of zero point and output span depending on the static pressure
Measuring ranges 10 and 30 mbar [0.15 and 0.45 psi]	To nominal pressure	40 bar [600 psi]
Influence on the zero point	< ±0.1%xTD
Influence on the span	< ±0.1%
Measuring ranges 100 and 500 mbar [1.5 and 7.5 psi]	To nominal pressure	160 bar [2,400 psi]
Influence on the zero point	< ±0.1%xTD
Influence on the span	< ±0.1%

Accuracy specifications

Measuring ranges 3 and 16 bar [45 and 240 psi]	To nominal pressure	400 bar [5,800 psi]
Influence on the zero point	< ±0.25%xTD
Influence on the span	< ±0.25%
Thermal change	Change of the current output with 4 ...20 mAsignals: 0.05 %per 10 K based on 20 °C [68 (maximum 0.15 %at set measuring span) in the ambient temperature range -40 …+80 °C [-40 …+176 °F]
Reference conditions per IEC 61298-1
Temperature	+18 ...+30 °C [64 ... 86 °F]
Air pressure	860 ... 1,060 mbar [86 ... 106 kPa, 12.5 ... 15.4 psig]
Air humidity	45 ... 75 %r.h.
Characteristic curve determination	Terminal method per IEC 61298-2
Curve characteristics	Linear
Reference mounting position	Vertical, i.e. vertical process assembly (connections are on the side)

Measuring range

Measuring range 1)	-10 mbar ... +10 mbar [-0.15 ... +0.15 psi]	-30 mbar ... +30 mbar [-0.45 ... +0.45 psi]
Maximum operating pressure	40 bar [600 psi]	160 bar [2,400 psi] (option: 400 bar [5,800 psi])
Lowest static pressure 2)	1 mbar abs.[0.015 psi], with application for oxygen the static pressure should not be lower than 10 mbar abs. [0.15 psi]
Turndown ratio	Maximum permissible turndown is unlimited (max. 20:1 is recommended)
Overload, on one side	40 bar [600 psi]	160 bar [2,400 psi] (option: 400 bar [5,800 psi])
Overload, on both sides	60 bar [900 psi]	240 bar [6,300 psi] (option: 630 bar [9,100 psi])

Connection	Mounting	Material	Equipment
¼-18 NPT IEC 61518	7/16-20 UNF	AISI 316L (1.4404)	2 vent valves 1)
¼-18 NPT IEC 61518	7/16-20 UNF	Hastelloy C276 (2.4819)	2 vent valves 1)

View all (14)

Connection	Mounting	Material	Equipment
¼-18 NPT IEC 61518	7/16-20 UNF	AISI 316L (1.4404)	2 vent valves, 4 plug screws 1)
¼-18 NPT IEC 61518	7/16-20 UNF	Hastelloy C276 (2.4819)	2 vent valves, 4 plug screws 1)

Output signal

Signal type	4 …20mA, 2-wire, (option: 4 ... 20 mA, 2-wire with superimposed communication signal HART ® , FOUNDATION™ Fieldbus, PROFIBUS ® PA)
Permissible max. load	R A = (U B - U Bmin )/0.023 A
Dead time	■ 160 ms (10 and 30 mbar [0.15 and 0.45 psi]) ■ 130 ms (remaining measuring ranges)
Time constant (90 %)	■ 115 ms (10 and 30 mbar [0.15 and 0.45 psi]) ■ 95 ms (100 mbar [1.5 psi]) ■ 75 ms (500 mbar [7.5 psi]) ■ 60 ms (3 bar [45 psi] and 16 bar [240 psi])
Damping (63 %of the input variable)	0 …999 s, adjustable
Deviation through interference	Strong, high-frequency fields can influence the current output with 4 …20mA, within the scope of EN 61326-1, by up to ±80 µA.
Voltage supply
Supply voltage	4 ...20mA	Inactive backlighting	DC 11 ...35V
Active backlighting	DC 16 ...35V
4 ... 20 mAwith a superimposed HART ® communication signal	Inactive backlighting	DC 11 ...35V
Active backlighting	DC 16 ...35V
PROFIBUS ® PA (max. 32 BUS instruments)	Inactive backlighting	DC 9 ...32V
Active backlighting	DC 13.5…32V
FOUNDATION™ Fieldbus (max. 32 BUS instruments)	Inactive backlighting	DC 9 ...32V
Active backlighting	DC 13.5…32V
Electrical safety	Overvoltage category III, protection class II

Electrical connection

Spring-loaded terminals	Wire cross-section	■ Wire or strand: 0.2 ... 2.5 mm² (AWG 24 ... 14) ■ Strand with end splice: 0.2 ... 1.5 mm² (AWG 24 ... 16)
Cable glands M20 x 1.5
Sealed with blind plug
Plastic, PA	Sealing	NBR
Cable diameter	■ 5 ... 9 mm[0.2 ... 0.35 in] ■ 6 ... 12 mm[0.24 ... 0.47 in] ■ 10 ... 14 mm[0.39 ... 0.55 in]
Brass, nickel-plated	Sealing	NBR
Cable diameter	■ 5 ... 9 mm[0.2 ... 0.35 in] ■ 6 ... 12 mm[0.24 ... 0.47 in]
Stainless steel	Sealing	NBR
Cable diameter	7 ... 12 mm[0.28 x 0.47 in]
Cable glands ½ NPT
Sealed with blind plug
Plastic, PA	Cable diameter	■ 5 ... 9 mm[0.2 x 0.35 in] ■ 6 ... 12 mm[0.24 ... 0.47 in] ■ 10 ... 14 mm[0.39 ... 0.55 in]
Brass, nickel-plated	Cable diameter	■ 5 ... 9 mm[0.2 ... 0.35 in] ■ 6 ... 12 mm[0.24 ... 0.47 in]
Electrical safety	Reverse polarity protection

Material

Material (wetted)
Process connection	316L (1.4404) (option: Hastelloy C276 (2.4819))
Diaphragm	316L (1.4435) (option: Hastelloy C276 (2.4819)
Sealing	FKM (option:EPDM, copper)
Case material
Single chamber case, plastic	PBT, polyester
Single chamber case, aluminium	Die-casting AlSi10Mg, powder-coated on PE basis
Single chamber case, cast stainless steel	Stainless steel 316L
Single chamber case, electropolished stainless steel, deep-drawn	Stainless steel 316L
Double chamber case, plastic	PBT, polyester
Double chamber case, aluminium	Die-casting AlSi10Mg, powder-coated on PE basis
Double chamber case, cast stainless steel	Stainless steel 316L
Pressure transmission medium 1)	Silicone oil (halocarbon oil for oxygen applications)

Display and operating unit (option)

Backlighting	Yes
Background	Grey, black digits
Upgradable	Yes (for order numbers, see 'Accessories')
Menu languages	German English French Spanish	Polish Italian Dutch Japanese	Turkish
Display size	5-digit measured value display, adjustable (option: bar graph display) Max. 5 digits, size 7 x 13 mm[0.28 x 0.51 in]
Ingress protection (IP code) per IEC 60529	■ IP20 (loose) ■ IP40 (built-in without cover)
Material	Case from ABS, window from polyester film

Operating conditions

Permissible temperature ranges
Ambient	■ -40 …+80 °C [-40 ...+176 °F] (without display) ■ -20 …+70 °C [-4 ...+158 °F] (with display)
Storage and transport	-60 …+80 °C [-40 ...+176 °F]
Restrictions to medium temperature due to the sealing material
FKM	-20 …+85 °C [-4 ...+185 °F]
EPDM, copper	-40 …+85 °C [-40 ...+185 °F]
FKM, oil- and grease-free	-10 …+85 °C [14 ... 185 °F]
For oxygen applications (max. static pressure: 160 bar [2,400 psi])	Copper	-20 …+60 °C [-4 ...+140 °F]
EPDM	-10 …+60 °C [-4 …+140 °F]
FKM	-10 …+60 °C [14 ... 140 °F]
Temperature limits	With differential pressure lines longer than 100 mm:-40 …+120 ° [-40 ... 248 °F]
Vibration resistance per IEC 60068-2-6 1)	4 g (5 …200 Hz), vibration under resonance
Shock resistance per IEC 60068-2-27	50 g for 2.3 ms, mechanical shock
Ingress protection (IP code) per IEC 60529	IP66/67 (standard case)
Weight	Approx. 4.2 …4.5 kg [9.26 ... 9.92 lbs] depending on the process connection and case variant

Logo	Description	Country
	EU declaration of conformity	European Union
	EMCdirective, interference emission (group 1, class B) and immunity per EN 61326-1:2013 (industrial application), EN 61326-2-3:2013 1)
	Pressure equipment directive
	RoHS directive

Logo	Description
SIL IEC 61508 / IEC 6151	SIL 2 (option) Functional safety ■ 1-channel operation up to SIL 2
-	NAMUR recommendations NE 021 - Electrical compatibility of equipment NE 043 - Signal level for failure information NE 053 - Compatibility of field instruments

Certificates

Certificates	■ 2.2 test report per EN 10204 (e.g. state-of-the-art manufacturing, material proof, indication accuracy) ■ 3.1 inspection certificate per EN 10204 (e.g. material proof for wetted metal parts, indication accuracy, calibration certificate)
Calibration	DAkkS calibration certificate (traceable and accredited in accordance with ISO/IEC 17025)

Description		Order number
	Display module, model DIH52-F 5-digit display, 20-segment bar graph, without separate power supply, with additional HART ® functionality. Automatic adjustment of measuring range and span. Secondary-master functionality: Setting the measuring range and unit of the connected transmitter possible using HART ® standard commands. Optional: Explosion protection per ATEX	On request
	HART ® modem for USB interface, specifically designed for use with notebooks (model 010031)	11025166
	HART ® modem for RS-232 interface (model 010001)	7957522
	HART ® modem for Bluetooth interface Ex ia IIC (model 010041)	11364254
	PowerXpress HART ® modem, with optional power supply (model 010031P)	14133234
	3-valve manifold, form A, ½NPTfemale (IEC 61518-A) Stainless steel, PN 420, form A, NACE-compliant, 3.1 material certificate	13382498
	3-valve manifold, form A, 1/4 NPT female (IEC 61518-A) Stainless steel, PN 420, form A, NACE-compliant, 3.1 material certificate	13382510
	5-valve manifold, form A, ½NPTfemale (IEC 61518-A) Stainless steel, PN 420, form A, NACE-compliant, 3.1 material certificate	13382552
	5-valve manifold, form A, 1/4 NPT female (IEC 61518-A) Stainless steel, PN 420, form A, NACE-compliant, 3.1 material certificate	13382561
	Oval flange, 1/4 NPT, stainless steel (2 pieces) Stainless steel, PN 420, form A, NACE-compliant, 3.1 material certificate	13382609
	Oval flange, ½NPT, stainless steel (2 pieces) Stainless steel, PN 420, form A, NACE-compliant, 3.1 material certificate	13382595
	Set of sealing plugs, 1/4 NPT, 316L (2 pieces) For the vents at the differential pressure sensor Included in delivery with lateral venting, except for process connection from Hastelloy	14035620
	Set of vent valves, 1/4 NPT, 316L (2 pieces) For the vents at the differential pressure sensor Included in delivery, except for process connection from Hastelloy	14368975
	Instrument mounting bracket for wall or pipe mounting with mounting bracket and screws, stainless steel	11553945
	Overvoltage protection For transmitters, 4 ... 20 mA, M20 x 1.5, series connection	14002489
	For transmitters, PROFIBUS ® PA, M20 x 1.5, series connection	14013659
	Model DI-PT-R display and operating module, case cover aluminium with window	12298884
	Model DI-PT-R display and operating module, case cover electropolished cast stainless steel with window	13315269
	Model DI-PT-R display and operating module, case cover plastic with window	13315277
	Model DI-PT-R display and operating module, case cover cast stainless steel with window for single chamber case	12298906
	Model DI-PT-R display and operating module, case cover cast stainless steel with window for double chamber case	14045598
	Model DI-PT-E external display and operating module, aluminium case	12354954
	Model DI-PT-E external display and operating module, cast stainless steel case	12355101
	Model DI-PT-E external display and operating module, plastic case	14134247

Differential pressure transmitter

Description

Special features

1 standard articles of family DPT