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WIKA · Pressure measurement · Family MA

Diaphragm pressure switch, flameproof enclosure Ex d

Name: Diaphragm pressure switch, flameproof enclosure Ex d
Brand: WIKA

Diaphragm pressure switch with flameproof enclosure Ex d for safety-critical applications in process industries

Range

-1…600 bar

Accuracy

≤ 1 % of span

Protection

IP66

NACE MR0175/ISO 15156NACE MR0103/ISO 17945EN 1854EN 12952EN 12953CERoHSEACII 1/2 GD (models MAB, MA, MAG)II 2 GD (model MAH)Ex db IIC T6/T4ATEXIECExUKCAEx UkraineCCCINMETROKCsECASEx dEx db IIC T6/T4 Ga/GbEx tb IIIC T85/T135 DbEx db IIC T6/T4 Gb

Price

On request

Depends on configuration

Request a quote

+38 (067) 285-77-70·info@avigan.com.uaViberTelegram

Description

These high-quality mechanical pressure switches have been developed especially for safety-critical applications. The great advantage of mechanical pressure switches is that no supply voltage is required for the switching process.

In production, the switches are traced by quality assurance software at every step and subsequently are 100 % tested. The robust switch enclosure from aluminium alloy can withstand the rough and corrosive operating conditions of the process industry with working ranges of up to 600 bar. The pressure switch is fitted with 1 or 2 microswitches, which make it possible to switch an electrical load of up to AC 250 V, 20 A directly.

For lower switching power ratings, such as for PLC applications, argon gas-filled microswitches with gold-plated contacts are available.

Special features

Robust switch enclosure from aluminium alloy, IP66, NEMA 4X
Setting ranges from 16 mbar to 600 bar, also all other equivalent vacuum or combined pressure and vacuum ranges
1 or 2 independent switch points, high switching power up to AC 250 V, 20 A
Switch point repeatability < 1 %

Identification

Model	MA
Subcategory	Diaphragm pressure switch

Measuring range

Pressure ranges

0…40 bar · 0…0.016 bar · 0…0.2 bar · 0…0.4 bar · 0…1 bar · 0…1.2 bar · 0…2.5 bar · 0…6 bar · 0…10 bar · 0…16 bar · 0…25 bar · 4…40 bar · 10…100 bar · 10…250 bar · 20…400 bar · 30…600 bar · -0.1…0.1 bar · -0.5…0.5 bar · -1…0 bar · -1…1.5 bar · -1…5 bar · -1…9 bar · -1…15 bar · -0.2…0 bar · -0.4…0 bar · -12.5…12.5 mbar · -30…30 mbar · -50…50 mbar · 0…100 mbar

Accuracy

Accuracy class	≤ 1 % of span
Accuracy standard	IEC 61298-2:2008
Safety integrity level (SIL)	SIL 2-qualified, SIL 3-qualified

Process conditions

Process connection

¼ NPT, female thread½ NPT, female thread via adapter½ NPT, male thread via adapterG ¼, female thread via adapterG ½ A, male thread via adapterG ¼ A, male thread via adapterASME B16.5 FlangeEN 1092-1 FlangeG 1/2 BM20x1.51/2 NPTASME B16.5 Class 150/300/600EN 1092-1 PN 10/401/4 NPT, female thread1/2 NPT, female thread via adapter1/2 NPT, male thread via adapterG1/4, female thread via adapterG1/2 A, male thread via adapterG1/4 A, male thread via adapterASME B16.51EN 1092-1

Process temperature

−60…+85 °C

Electrical characteristics

Electrical connection	½ NPT female (standard), ¾ NPT, Gk ½, Gk ¾, M20 x 1.5 female, Cable gland non-armoured, Ex d, nickel-plated brass, Cable gland armoured, Ex d, AISI 304
Switching function	1 or 2 independent switch points, SPDT, DPDT
Switching contacts	2

Materials

Case material	Aluminium alloy, copper-free, painted with acrylic paint
Wetted parts material	Stainless steel 316, PTFE, Stainless steel 316L, Monel, Hastelloy C276, FPM, NBR
Sealing material	FPM, NBR, PTFE, welded diaphragm

Operating environment

Ambient temperature	−60…+85 °C
IP rating	IP66
Weight	3.1 kg

Certifications and approvals

Certifications	NACE MR0175/ISO 15156NACE MR0103/ISO 17945EN 1854EN 12952EN 12953CERoHSEAC
Explosion protection	II 1/2 GD (models MAB, MA, MAG)II 2 GD (model MAH)Ex db IIC T6/T4Gb, Ex tb IIIC T85/T135 Db (models MAB, MA, MAG)Gb, Ex tb IIIC T85/T135 Db (model MAH)ATEXIECExUKCAEACEx UkraineCCCINMETROKCsECASEx dEx db IIC T6/T4 Ga/GbEx tb IIIC T85/T135 DbEx db IIC T6/T4 Gb

Additional details

Datasheet languages

Tables from datasheet

Basic information
Version	Diaphragm pressure switch, flameproof enclosure Ex d
Special design feature	■ For oxygen, oil- and grease-free ■ Per NACE 1) MR0175 / ISO 15156, use in H₂S-containing environments in oil and gas production ■ Per NACE 1) MR0103 / ISO 17945, metals resistant to sulphide stress cracking ■ Version compliant with EN 1854, pressure sensing devices for gas burners and gas burning appliances ■ Version compliant with EN 12952 and EN 12953, limiting devices in water- tube and shell boilers ■ Drying of wetted parts ■ Offshore version ■ Tropical version (suitable for environments with increased air humidity) ■ Version for ammonia applications ■ Geothermal version ■ Low-temperature version to -60 °C ■ Assembled as a diaphragm seal system ■ Additional protection from stainless steel 316L or Hastelloy for setting ranges 2.5 ... 25 bar
Contact version	→See table 'Contact version'
Function	■ 1 x SPDT (single pole double throw) ■ 2 x SPDT (single pole double throw) ■ 1 x DPDT (double pole double throw) The DPDT function is realised with 2 simultaneously triggering SPDT microswitches, within 0.2 %of span.
Dead band	■ 1 or 2 contacts with fixed dead band ■ 1 or 2 contacts with adjustable dead band ■ 1 contact with fixed dead band and 1 contact with adjustable dead band
Dielectric strength	Safety class I (IEC 61298-2: 2008)
Switch enclosure
Design	Housing cover can be secured against unauthorised access with screw locking. Laser-engraved product label from stainless steel.
Material	Aluminium alloy, copper-free, painted with acrylic paint
Mounting 2)	■ Direct mounting ■ Wall bracket from stainless steel AISI 304 ■ Mounting bracket for 2" pipe mounting from stainless steel AISI 304

Contact version	Electrical rating (resistive load)
		AC	DC
With fixed dead band
UN	1 x SPDT, silver	250 V, 15 A	24 V, 2 A, 125 V, 0.5 A, 220 V, 0.25 A
US	1 x SPDT, silver, hermetically sealed, argon gas filling 1)	250 V, 15 A	24 V, 2 A, 220 V, 0.5 A
UO	1 x SPDT, gold-plated, hermetically sealed, argon gas filling 1)	125 V, 1 A	24 V, 0.5 A
UG	1 x SPDT, gold-plated	125 V, 1 A	24 V, 0.5 A
DN	2 x SPDT or 1 x DPDT, silver	250 V, 15 A	24 V, 2 A, 125 V, 0.5 A, 220 V, 0.25 A
DS	2 x SPDT or 1 x DPDT, silver, hermetically sealed, argon gas filling 1)	250 V, 15 A	24 V, 2 A, 220 V, 0.5 A
DO	2 x SPDT, or 1 x DPDT gold-plated, hermetically sealed, argon gas filling 1)	125 V, 1 A	24 V, 0.5 A
DG	2 x SPDT or 1 x DPDT, gold-plated	125 V, 1 A	24 V, 0.5 A

Contact version	Electrical rating (resistive load)
		AC	DC
With adjustable dead band
UR	1 x SPDT, silver	250 V, 20 A	24 V, 2 A, 220 V, 0.5 A
RR 3)	2 x SPDT or 1 x DPDT, silver	250 V, 15 A	24 V, 2 A, 220 V, 0.5 A
With fixed dead band and adjustable dead band
DR 3)	2 x SPDT, silver (1 x UN + 1 x UR)	250 V, 15 A	24 V, 2 A, 220 V, 0.5 A

Sensor element	Model	Wetted parts	Permissible medium temperature 1)
			Sensor element	Process connection
Setting range 0 …16mbar to 0 …40bar
XX 2)	Diaphragm element	MAB,MA	Stainless steel 316 3)	Stainless steel 316L	-30 ...+85 °C
TX	Diaphragm element	MAB,MA	Stainless steel 316 3) + PTFE 4)	Stainless steel 316L	-30 ...+85 °C
TT	Diaphragm element	MAB,MA	Stainless steel 316 3) + PTFE 4)	Stainless steel 316L + PTFE	-30 ...+85 °C
KK 2)	Diaphragm element	MAB,MA	Monel 5)	Monel	-30 ...+85 °C
KX 2)	Diaphragm element	MAB,MA	Monel 5)	Stainless steel 316L	-30 ...+85 °C
Setting range 4 …40bar to 30 …600 bar
GXX 6)	Piston with welded diaphragm element	MAG	Hastelloy C276	Stainless steel 316L	-40 ...+85 °C
HXX 7)	Piston with O-ring sealing from FPM	MAH	Stainless steel 316	Stainless steel 316L	0 ... 85 °C
Piston with O-ring sealing from NBR	MAH	Stainless steel 316	Stainless steel 316L	-10 ...+85 °C

View all (20)

Accuracy specifications

Set point repeatability	≤ 1 %of span of setting range
Dead band	→See table 'Setting range'

Setting range for model MAB Span of setting range from 16 mbar to max. 100 mbar

Standard	Variant 1	Variant 2	Dead band
Setting range (= working range)	Proof pressure	Working range	Proof pressure	Working range	Proof pressure	1 contact, fixed	2 contacts, fixed	1 contact, adjustable
in mbar					in bar	in mbar	in mbar	in mbar
		in bar	in bar	in bar
0 ... 16	250	0 ... 8	10	-1 ... 8 1)	10	≤ 2.0	≤ 2.8	-
0…25	250	0 ... 8	10	-1 ... 8 1)	10	≤ 2.0	≤ 3	8 …18
0…40	300	0…8	10	-1 ... 8 1)	10	≤ 2.6	≤ 3.4	8…20
0 ... 60	300	0…8	10	-1 ... 8 1)	10	≤ 3.0	≤ 4.2	12…25
0 ... 100	600	0…8	10	-1 ... 8 1)	10	≤ 3.6	≤ 5	17…40

Setting range for model MAB Span of setting range from 16 mbar to max. 100 mbar

Standard	Variant 1	Variant 2	Dead band
Setting range (= working range)	Proof pressure	Working range	Proof pressure	Working range	Proof pressure	1 contact, fixed	2 contacts, fixed	1 contact, adjustable
in mbar		in bar	in bar	in bar	in bar	in mbar	in mbar	in mbar
-16 ... 0	-21	-1…0 1)	0.25	-	-	≤ 2.0	≤ 2.8	-
-25 ... 0	-35	-1…0 1)	0.25	-	-	≤ 2.0	≤ 3	8…18
-40 ... 0	-55	-1…0 1)	0.30	-	-	≤ 2.6	≤ 3.4	8…20
-60 ... 0	-90	-1…0 1)	0.30	-	-	≤ 3.0	≤ 4.2	12…25
-100 ... 0	-150	-1…0 1)	0.40	-	-	≤ 3.6	≤ 5	17…40
-12.5 ... +12.5	-25 / 250	-	-	-	-	≤ 2.0	≤ 3	8…18
-30 ... +30	-60 / 250	-	-	-	-	≤ 3.0	≤ 4.2	12…25
-50 ... +50	-100 / 250	-	-	-	-	≤ 3.6	≤ 5	17…40

Setting range for model MA Span of setting range from 0.2 bar to max. 40 bar

Standard	Variant 1	Variant 2	Dead band
Setting range (= working range)	Proof pressure	Working range	Proof pressure	Working range	Proof pressure	1 contact, fixed	2 contacts, fixed	1 contact, adjustable
in bar	in bar	in bar	in bar	in bar	in mbar	in mbar	in mbar
0 ... 0.2	6	0…32	40	-1…32 1)	40	≤ 10	≤ 13	30…70
0 ... 0.4	10	0…32	40	-1…32 1)	40	≤ 15	≤ 20	40 ... 95
-0.2 ... 0	-0.3	-1…0 1)	-1	-1 ... 8	10	≤ 10	≤ 13	30…70
-0.4 ... 0	-0.6	-1…0 1)	-1	-1 ... 8	10	≤ 15	≤ 20	40…95
-0.1 ... +0.1	-0.2 / 1	-	-	-	-	≤ 10	≤ 13	30…70
-0.5 ... 0.5	-1 / 4	-	-	-	-	≤ 15	≤ 50	75 ... 170
-1 ... 0	-1	-1…8	10	-	-	≤ 15	≤ 50	75 …170
-1 ... 1.5	2	-1…8	10	-	-	≤ 48	≤ 67	200 …500
-1 ... 5	60	-1…80	100	-	-	≤ 100	≤ 160	400 …1,000
-1 ... 9	60	-1…80	100	-	-	≤ 100	≤ 180	600 …1,400
-1 ... 15	60	-1…80	100	-	-	≤ 150	≤ 250	1,000 …2,400
0 ... 1	25	0…32	40	-1…32	40	≤ 15	≤ 50	75 …170
0 ... 1.2	25	0…32	40	-1…32	40	≤ 15	≤ 50	75 …170
0 ... 2.5	60	0…80	100	-1…80	100 2)	≤ 48	≤ 67	200 …500
0 ... 6	60	-1…80	100	-	-	≤ 100	≤ 160	400 …1,000
0 ... 10	60	-1…80	100	-	-	≤ 100	≤ 180	600 …1,400
0 ... 16	60	-1…80	100	-	-	≤ 150	≤ 250	1,000 …2,400
0 ... 25	60	-1…80	100	-	-	≤ 300	≤ 450	1,700 …4,000
0 ... 40	60	-	-	-	-	≤ 400	≤ 800	2,200 …5,800

Setting range for models MAG and MAH Setting range to 600 bar

Standard	Dead band
Setting range (= working range)	Proof pressure	1 contact, fixed	2 contacts, fixed	1 contact, adjustable 1)
in bar	in bar	in bar	in bar
4 ... 40	100	≤ 3	≤ 4	5…11to8…15
10 ... 100	200	≤ 4	≤ 6	10 …22to15…28
10 ... 250	400	≤ 10	≤ 13	15 …38to27…55
20 ... 400	600	≤ 10	≤ 25	35 …80to43…90
30 ... 600	700	≤ 20	≤ 25	45 ... 105 to 83 ... 155

Process connection
Standard	■ ANSI/ASME B1.20.1 ■ DIN EN ISO 228 ■ ASME B16.5 1) ■ EN 1092-1 1)
Size
ANSI/ASME B1.20.1	■ ¼NPT, female thread ■ ½NPT, female thread via adapter ■ ½NPT, male thread via adapter
DIN EN ISO 228	■ G¼, female thread via adapter ■ G½A,male thread via adapter ■ G¼A,male thread via adapter
ASME B16.5 1)	Flange variant 'S' :With fixed stud bolts and included nuts and washers
EN 1092-1 1)	Flange variant 'T' :With through-holes and extension pipe →See dimensions from page 9
Material (wetted)
Sensor element	Depending on the selected sensor element →See table 'Sensor element'
Process connection
Sealing	PTFE, FPM, NBR, without sealing: welded diaphragm, depending on setting range and operating conditions. →See table 'Setting range'

Electrical connection

Connection type	■ ½NPTfemale (standard) ■ ¾NPT, Gk ½, Gk ¾, M20 x 1.5 female ■ Cable gland non-armoured, Ex d, nickel-plated brass ■ Cable gland non-armoured, Ex d, AISI 304 ■ Cable gland armoured, Ex d, nickel-plated brass ■ Cable gland armoured, Ex d, AISI 304
Wire cross-section	Use 0.5 ... 1.5 mm² (20 ... 16 AWG) for internal terminal block (also suitable for cable lugs). For the grounding cable connection to the protective conductor use max. 4 mm² for the internal and external screw.
Pin assignment	Connection details are given on the product label of the instrument. Connection terminals and the ground terminal are appropriately marked.

Operating conditions

Medium temperature range	Depending on sensor element and sealing →See table 'Sensor element'
Ambient temperature range	T6/T85°C T a -60 ...+60
	T4/T135°C T a -60 ...+85
Ingress protection of the complete instrument	IP66 per EN/IEC 60529 (NEMA 4X)
Weight	Approx. 3.1 kg for models MA, MAG,MAH Approx. 3.5 kg for model MAB

Logo	Description	Region
	EU declaration of conformity Pressure equipment directive PED, annex 1, category IV, safety accessories, module B + D Low voltage directive RoHS directive ATEX directive 1) II 1/2 GD(models MAB, MA, MAG)	European Union
	IECEx 1) Ex db IIC T6/T4 2) Ga/Gb, Ex tb IIIC T85/T135 2) Db (models MAB, MA, MAG) Ex db IIC T6/T4 2) Gb, Ex tb IIIC T85/T135 2) Db (model MAH)	International

Logo	Description	Region
	UKCA	United Kingdom
	Pressure equipment (safety) regulations
	Electrical equipment designed for use within certain voltage limits in support of the electrical equipment (safety) regulations
	Restriction of hazardous substances (RoHS) regulations
	Equipment and protective systems intended for use in potentially explosive atmospheres regulations 1)
	EAC Hazardous areas 1)	Eurasian Economic Community
	Ex Ukraine Hazardous areas 1)	Ukraine
	CCC Hazardous areas 1)	China
	INMETRO Hazardous areas 1	Brazil
	KCs Hazardous areas 1)	South Korea
-	ECAS Hazardous areas 1)	United Arab Emirates

Logo	Description
SIL3 IEC 61508 / IEC 61511	SIL 3-capable (option) Functional safety per IEC 61508 Contains performance level calculation per ISO 13849-1

Certificates

Certificates	■ 2.2 test report per EN 10204 (e.g. state-of-the-art manufacturing, indication accuracy) ■ 3.1 inspection certificate per EN 10204 (e.g. indication accuracy)
Recommended calibration interval	1 year (dependent on conditions of use)

DN	Class	Dimensions in mm[in]
D	b	a	P	L
½"	150	110 [43,31]	25 [9,84]	60,3 [23,74]	4 x M14	51 [20,08]
300	110 [43,31]	25 [9,84]	66,7 [26,26]	4 x M14	51 [20,08]
¾"	150	110 [43,31]	25 [9,84]	69,8 [27,48]	4 x M14	51 [20,08]
1"	150	110 [43,31]	25 [9,84]	79,4 [31,26]	4 x M14	51 [20,08]
300	150 [59,06]	25 [9,84]	88,9 [35]	4 x M16	54 [21,26]
1 ½"	150	150 [59,06]	25 [9,84]	98,4 [38,74]	4 x M14	51 [20,08]
300	150 [59,06]	25 [9,84]	114,3 [45]	4 x M20	60 [23,62]
2"	150	150 [59,06]	25 [9,84]	120,6 [47,48]	4 x M16	54 [21,26]
300	165 [64,96]	22 [8,66]	127 [50]	8 x M16	54 [21,26]

DN	PN	Dimensions in mm[in]
		D	b	a	P	L
15	10/40	110 [43,31]	25 [9,84]	65 [25,59]	4 x M12	48 [18,9]
20	10/40	110 [43,31]	25 [9,84]	75 [29,53]	4 x M12	48 [18,9]
25	10/40	110 [43,31]	25 [9,84]	85 [33,46]	4 x M12	48 [18,9]
40	10/40	150 [59,06]	25 [9,84]	110 [43,31]	4 x M16	54 [21,26]

DN	Class	Dimensions in mm[in]
		B	D
		FF	RF	RJ
½"	300	12,6 [4,96]	14,2 [5,59]	-	12 [4,72]
600	-	20,6 [8,11]	19,8 [7,8]	12 [4,72]
¾"	150	11,2 [4,41]	12,8 [5,04]	-	12 [4,72]
300	14,3 [5,63]	15,9 [6,26]	-	11 [4,33]
600	-	22,1 [8,7]	22,1 [8,7]	11 [4,33]
1"	150	12,6 [4,96]	14,2 [5,59]	-	11 [4,33]
300	15,9 [6,26]	17,5 [6,89]	-	11 [4,33]
600	-	23,9 [9,41]	23,9 [9,41]	11 [4,33]
1 ½"	150	15,9 [6,26]	17,5 [6,89]	-	26,7 [10,51]
300	19,1 [7,52]	20,7 [8,15]	-	26,7 [10,51]
600	-	28,7 [11,3]	28,7 [11,3]	26,7 [10,51]
2"	150	17,5 [6,89]	19,1 [7,52]	-	26,7 [10,51]
300	20,7 [8,15]	22,3 [8,78]	-	26,7 [10,51]
600	-	31,7 [12,48]	32,2 [12,68]	26,7 [10,51]

DN	PN	Dimensions in mm[in]
		B	D
		Form A	Form B1
20	10/40	18 [7,09]	18 [7,09]	16 [6,3]
25	10/40	18 [7,09]	18 [7,09]	25 [9,84]
40	10/40	-	18 [7,09]	25 [9,84]