Intrinsically safe explosion-proof for pressure sensor Zener-barrier series | VALCOM CO.,LTD. [Specialized manufacturer of Digital Pressure Meters and Load Cells]

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Intrinsically safe explosion-proof for pressure sensor Zener-barrier
Zener-barrier series VEK216

Explosion-proof rate
Zener-barrier: ⅡC / Pressure sensor: ⅡC T4 Ga

Applicable Sensor	VPRF(IS), VPRQ(IS), VPRQF(IS), VPRNP(IS)
Measured medium	VPRF(IS), VPRQ(IS), VPRQF(IS): SUS630 and 15-5PH (precipitation-hardened stainless steel) VPRNP(IS): Media that will not corrode SUS316L (Refer to the individual specifications.)
Measured Range	VPRNP(IS): 100 to 1700kPa or 100 to 1700kPa abs VPRQ(IS), VPRF(IS): 1 to 50MPa VPRQF(IS): 1 to 100MPa (Refer to the individual specifications.)

[Zener-barrier] Specifications

TIIS Certification Number	No. TC22249
Model	VEK216
Explosion-proof structure	Intrinsic safety explosion-proof structure (To be installed in non-hazardous area)
Explosion-proof performance	[Ex ia] ⅡC
Grounding	Independent class A grounding required.
Rating	Max. voltage of intrinsically safe circuit: 14.4V Max. current of intrinsically safe circuit: 150mA Max. power of intrinsically safe circuit: 270mW Max. inductance allowed in the intrinsically safe circuit: 0.79mH Max. capacitance allowed in the intrinsically safe circuit: 335nF Max. voltage allowed in the non-intrinsically safe circuit: 250V AC 50/60Hz, 250V DC Ambient Temperature: -20 to ;+60°C

[Pressure sensor] Specifications

TIIS Certification Number	No. TC22316X	No. TC22317X
Applicable sensor series	VPRNP(IS)	VPRF(IS)	VPRQ(IS)	VPRQF(IS)
Explosion-proof structure	Intrinsically safe explosion-proof structure
Explosion-proof performance	Ex ia ⅡC T4 Ga
Input voltage	±2.5V or 5V
Rating	Max. voltage allowed in the intrinsically safe circuit: 14.4V Max. current allowed in the intrinsically safe circuit: 150mA Max. power allowed in the intrinsically safe circuit: 0.270W Inside inductance: 0.28mH Inside capacitance: 32nF Ambient Temperature: VPRF(IS), VPRQ(IS), VPRQF(IS): -20 to +60°C, VPRNP(IS): -20 to +50°C
Measured medium	VPRF(IS), VPRQ(IS), VPRQF(IS): SUS630 and 15-5PH (precipitation-hardened stainless steel), VPRNP(IS): Media that will not corrode SUS316L

[terms of use]
Risk of ignition by shock or friction Aluminum alloy is included in the structural material of the enclosure. Since the mass fraction of the aluminum alloy is more than the predetermined value, there is a potential risk of ignition. Do not drop the product or subject it to excessive shock or friction. Risk of electrostatic charge Non-metallic materials are included in the surface of the enclosure. To avoid the risk of ignition, take measures to prevent electrostatic charge.

[terms of use]

Risk of ignition by shock or friction
Aluminum alloy is included in the structural material of the enclosure.
Since the mass fraction of the aluminum alloy is more than the predetermined value, there is a potential risk of ignition. Do not drop the product or subject it to excessive shock or friction.
Risk of electrostatic charge
Non-metallic materials are included in the surface of the enclosure.
To avoid the risk of ignition, take measures to prevent electrostatic charge.

Model Selection

Example

①Model	②Rated Capacity(R.C.)		③Cable Connection	④Connection Screw	⑤Length(Cable)
VPRF(IS)	1MP(1MPa) 2MP(2MPa) 5MP(5MPa) 10MP(10MPa) 20MP(20MPa) 50MP(50MPa)		Blank (Standard connector) W (Waterproof connector)	G3/8	3m(Standard) 5m 10m □□m If you prefer other length(*3)
VPRQ(IS)	1MP(1MPa) 2MP(2MPa) 5MP(5MPa) 10MP(10MPa) 20MP(20MPa) 35MP(35MPa) 50MP(50MPa)			R3/8
VPRQF(IS)	1MP(1MPa) 2MP(2MPa) 5MP(5MPa) 10MP(10MPa) 20MP(20MPa) 35MP(35MPa) 50MP(50MPa) 100MP(100MPa)			G3/8 (100MPa: G1/2)
VPRNP(IS)	Guage Pressure	100(100kPa) 200(200kPa) 700(700kPa) 1700(1700kPa)		R3/8 G3/8 Specify thread size.
VPRNP(IS)	Absolute Pressure	100A(100kPa abs) 200A(200kPa abs) 700A(700kPa abs) 1700A(1700kPa abs)		R3/8 G3/8 Specify thread size.

Note
*1 Always use in combination with VALCOM amplifier.
Models are subject to change in part due intrinsic safety or explosion-proof purpose. Always contact our sales office for confirmation.
*2 Please order the cable length between VALCOM amplifier and Zener-barrier.
*3 Between Conformity sensor and Zener-barrier use dedicated to cable for safe explosion-proof. (Max 200m / VPRNP guage pressure · W (Waterproof connector): Max 100m)

Examples of explosion-proof construction

(1) Pressure sensor
Examples of explosion-proof construction

(2) Zener-barrier
Examples of explosion-proof construction

①EPL
Ga	Equipment having a very high level of protection that can be used in particularly hazardous locations.
Gb	Equipment having a high level of protection that can be used in Group I explosive gas atmospheres.
Gc	Equipment having an enhanced level of protection that can be used in Group II explosive gas atmospheres.

② Temperature class
T1	Maximum surface temperature: Over 300°C and 450°C or less
T2	Maximum surface temperature: Over 200°C and 300°C or less
T3	Maximum surface temperature: Over 135°C and 200°C or less
T4	Maximum surface temperature: Over 100°C and 135°C or less
T5	Maximum surface temperature: Over 85°C and 100°C or less
T6	Maximum surface temperature: 85°C or less

③ Electrical equipment group
ⅡA	Representative gas: Propane
ⅡB	Representative gas: Ethylene
ⅡC	Representative gas: Hydrogen
Only Group Ⅱ (Intended for use in locations where explosive gas atmospheres exist other than in a mine susceptible to firedamp) subdivisions are listed. Electrical equipment in Group Ⅱ are subdivided according to the nature of the explosive gas atmospheres in which the equipment is to be used, as shown in the table below (*4).

④ Explosion-proof construction
ia	Meets the requirements of intrinsically safe explosion-proof construction.
d	Meets the requirements of flameproof enclosure.

Typical Explosive Gas Groups and Temperature Classes (*4)

		Temperature class
		T1	T2	T3	T4	T5	T6
Group	ⅡA	Acetonitrile Acetone Ammonia Ethane Isopropyl chloride M-xylene P-xylene Acetic acid Ethyl acetate Ethyl bromide Styrene 1,2,4-Trimethylbenzene Toluene Propylene Benzene Methane	Acetylacetone Isopentane Vinyl chloride O-xylene Isopentyl acetate Vinyl acetate Butyl acetate Propyl acetate Pentyl acetate Methyl acetate Diisopropyl ether Cyclohexanone 1.2-Dichloroethane Chiofeng 1-Butanol Butane Propane 2-Propanol 1-Pentanol Acetic anhydride Methyl methacrylate Methanol	Butyl chloride Octane Cyclohexane Deccan Butyraldehyde Hexane Heptane Pentane	Acetaldehyde		Ethyl nitrite
	ⅡB	Methyl acrylate Acrylonitrile Carbon monoxide Hydrogen cyanide	Ethyl acrylate Ethanol Ethyl methyl ketone Ethylene Ethylene oxide Epichlorohydrin 1,4-Dioxane 1,3-Butagen Franc Propylene oxide	Dimethyl ether Tetrahydrofuran 1-Hexanol	(di)ethyl ether Dibutyl ether
	ⅡC	Water gas, Hydrogen	Acetylene				Carbon bisulfide

[Note]
This table summarizes the classification of flammable gases and vapors according to the explosion-proof construction of electrical equipment.
It is intended as a basic reference for electrical technicians to be used for classifying hazardous locations and for selecting electrical equipment having adequate explosion-proof performance.
Ignition point, explosion limit, and flash point are discussed in many literatures. Consult them by yourself to select appropriate explosion-proof equipment.
(Reference) TECHNICAL RECOMMENDATION OF NATIONAL INSTITUTE OF OCCUPATIONAL SAFETY AND HEALTH "USER'S GUIDELINE for Installations for Explosive Atmospheres in General Industry" JNIOSH-TR-NO.44 (2012)

External dimensions (Unit: mm)

Wiring diagram

Pressure Sensor