XA02692C/07/EN/01.21
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Safety Instructions
Memosens ISFET pH sensors
pH measurement
Supplement to BA02154C
Safety instructions for electrical apparatus inexplosion-hazardous areas
ATEX II 1G Ex ia IIC T3/T4/T6 Ga
ATEX II 1G Ex ia IIC T4/T6 Ga
IECEx Ex ia IIC T3/T4/T6 Ga
IECEx Ex ia IIC T4/T6 Ga

0Memosens ISFET pH sensors

XA02692C

Memosens ISFET pH sensors
pH measurement
Table of contents
Associated documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Supplementary documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Temperature tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installation conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

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Memosens ISFET pH sensors

Associateddocumentation

This document is an integral part of Operating Instructions BA02154C.

Supplementary
documentation

Competence Brochure CP00021Z• Explosion Protection: Guidelines and General Principles• www.endress.com

Certificates

The certificates and declarations of conformity are available in theDownloads area of the Endress+Hauser website:www.endress.com/download
EU declaration of conformity
EU_00949
EU type-examination certificate
BVS 19 ATEX E 062 X
IECEx certificate
IECEx BVS 19.0056X

Identification

The nameplate provides you with the following information on yourdevice:• Manufacturer identification• Order code
• Extended order code
• Serial number• Safety information and warnings• Ex labeling on hazardous area versions‣ Compare the information on the nameplate with the order.
Type codeATEX4TypeVersion

xPS47ExPS77EBA*x = C, OC
No Ex relevanceII 1G Ex ia IIC T3/T4/T6 Ga

No Ex relevance****+*Endress+Hauser

Memosens ISFET pH sensors

XA02692C

TypeVersionxPS97E

BA*x = C, OC
No Ex relevanceII 1G Ex ia IIC T4/T6 Ga

No Ex relevance****+**+**+*

IECEx
TypeVersionxPS47E
xPS77EIA*x = C, OC
No Ex relevanceEx ia IIC T3/T4/T6 Ga

No Ex relevance***TypeVersionxPS97E

IA*x = C, OC
No Ex relevanceEx ia IIC T4/T6 Ga

No Ex relevance***Certificates and approvals
Declaration of conformity
With this declaration of conformity, the manufacturer guarantees thatthe product conforms to the regulations of European EMC Directive
2014/30/EU and ATEX Directive 2014/34/EU. Compliance is verified
by adherence to the standards listed in the Declaration of Conformity.
Ex approvals
CPS47E / CPS77E:

0 II 1G Ex ia IIC T3/T4/T6 Ga
CPS97E:

0 II 1G Ex ia IIC T4/T6 Ga

The product meets the requirements of the "IEC Certification Scheme forExplosive Atmospheres". This is verified by compliance with thestandards listed in the IECEx certificate. The IECEx certificate can beviewed on the following website: www.iecex.com.
CPS47E / CPS77E:
Ex ia IIC T3/T4/T6 Ga
CPS97E:Ex ia IIC T4/T6 Ga
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Memosens ISFET pH sensors

Notified body
DEKRA EXAM GmbH

Safetyinstructions

6• It is not permitted to operate the sensor under electrostatically criticalprocess conditions. Significant vapor and dust clouds, which have adirect impact on the Memosens sensor head, must be avoided.
• The sensors must not be operated under process conditions where
the sensor and the connection system can become electrostaticallycharged. Operation in liquid media that are intended for the productapplication and have a minimum conductivity of 10 nS/cm is notconsidered critical with regard to electrostatic charge.
• Ex-protected digital sensors with Memosens technology are
identified by an orange-red ring on the terminal head.
• When using devices and sensors, observe the regulations forelectrical systems in hazardous areas (EN/IEC 60079-14).
• The procedures for electrical connection described in the OperatingInstructions must be followed.
• This device was developed and manufactured in accordance with
Directive 2014/34/EU dated February 26, 2014 and also complies
with the following standards:• EN IEC 60079-0:2018 / IEC 60079-0:2017
Hazardous areas
Part 0: General requirements• EN 60079-11:2012 / IEC 60079-11:2011 + Corrigendum:2012
Electrical apparatus for explosive atmospheres
Part 11: Intrinsic safety "i"Endress+Hauser

Memosens ISFET pH sensors

Temperaturetables

XA02692CSensor

Temperatureclass

CPS47E T3
CPS77ET4

T6
CPS97E T4

T6

Process temperature TpAmbient temperature Ta

Minimum

Minimum

Maximum

Maximum–15 °C (5 °F) 135 °C (275 °F) –15 °C (5 °F) 70 °C (158 °F)–15 °C (5 °F) 115 °C (239 °F) –15 °C (5 °F) 75 °C (167 °F)
110 °C (230 °F)

80 °C (176 °F)

100 °C (212 °F)

85 °C (185 °F)

90 °C (194 °F)

90 °C (194 °F)–15 °C (5 °F) 65 °C (149 °F)–15 °C (5 °F) 65 °C (149 °F)–15 °C (5 °F) 110 °C (230 °F) –15 °C (5 °F) 80 °C (176 °F)
100 °C (212 °F)

85 °C (185 °F)

90 °C (194 °F)

90 °C (194 °F)–15 °C (5 °F) 65 °C (149 °F)–15 °C (5 °F) 65 °C (149 °F)

The above temperature table applies only under the following
installation conditions, which are described in the following graphic→  8. If the installation conditions cannot be met, the maximum
process temperature Tp must not exceed the maximum ambient
temperature Ta.

Connection

Ex specification• The CPSx7E-type ISFET pH sensors are approved according to EU
type-examination certificate BVS 19 ATEX E 062 X and are suitablefor use in hazardous environments.
• The approved digital ISFET pH sensors have an intrinsically safe input
with the following parameter set:Parameter

ValuePi180 mW

The approved CPSx7E-type digital ISFET pH sensors must be connected
to a Memosens measuring cable with an intrinsically safe output withthe following parameter:

Endress+Hauser

Parameter

Value

PoMaximum 180 mW

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Memosens ISFET pH sensors

Installation
conditions

4> 37 (1.46)

2

1

3A0041281

112348

Installation conditions
Limit
Distance between plug-in head (lower edge) and process medium, without
ring and thrust collar
Process temperature Tp
Ambient temperature Ta

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