Pressure Sensor
Rev.2

ER31

Liquid/Gas
measurement

Battery-Less Pressure Sensor• RFID (NFC) realizes battery-less and wireless power supply• Pressure & ambient temperature data can be acquired by touching the product• Easy to install due to compact size and no wiring required• Compliant with the RE Directive of the EU Radio Law

RFID (NFC) realizes
battery-less andwireless power supply!

Standard type

Cutting-edge diaphragm type

(With stainless diaphragm)

ER31

Battery-less Pressure Sensor

Battery-less pressure sensor with RFID (NFC)
contributes to IoT of production sites andefficiency of patrol monitoring!

1 Wireless power supply!
2 Easy to install due to compact size
and no wiring required.

3 Measures pressure and temperature*
4 1/8 weight of conventional pressure* Temperature data is a reference value (temperature inside the case).

gauge* (approx. 100 g)* Compared with ø100 pressure gauge.

Application examples

Pressure measurement for regular and irregularpatrol monitoring
Visual inspection is prone to mistakes

Improved inspection workability with one touch!
Easy to read
Reducing mistakes

Reading mistakes
Writing mistakes

Measuring pressure in extremely small areas
No wiring is required, so pressure measurement
at extremely small points is easy

Wired connection is cumbersome

Smart factory
RFID antenna(Option)

RFID
reader/writer (Option)

Battery-lesspressure sensor
Inspection work

MovePC

Belt conveyor

Data processing after measurement
Converting handwritten records into data
is time-consuming
Reading mistakes
Writing mistakes＊ For measurement software for using the RFID reader/writer,
please contact us.

Improving workability of data aggregation
with one touch!
Direct CSV output of read data

Main specifications and performance• ER31 Battery-less pressure sensor
Pressure range(Described in display digits)
Gauge pressure＊1

Absolute pressure

0.0 to 50.0 kPa-20.0 to 20.0 kPa

0.0 to 100.0 kPa-50.0 to 50.0 kPa-100.0 to 0.0 kPa

0.0 to 200.0 kPa

Positiondiﬀerence（at 23℃）

Temperature
characteristics(Both zero and span)

130 Pa abs. 30 Pa or
less/90
0.0 to 120.0 kPa abs. 200 kPa abs. or more

-100.0 to 100.0 kPa

400 kPa-100 to 300 kPa(1.0 ％F.S.
+1digit)(at 23 2 ℃)

1000 kPa

0.000 to 0.500 MPa -0.100 to 0.500 MPa
0.000 to 1.000 MPa -0.100 to 1.000 MPa
0.000 to 2.000 MPa -0.100 to 2.000 MPa
Medium and highpressure range

Accuracy

200 kPa-100.0 to 200.0 kPa
0.0 to 300.0 kPa

Allowable
vacuumpressure

100 kPa

0.00 to 35.00 kPa

Absolute pressure
and low pressure
rangeMax. allowablepressure

200 % ofpressure range

0.000 to 3.500 MPa
0.00 to 5.00 MPa――

0.1 ％F.S./℃―

0.00 to 10.00 MPa
0.00 to 20.00 MPa
0.00 to 35.00 MPa

150 % ofpressure range

0.0 to 50.0 MPa*1 Allowable maximum pressure is the upper limit to which pressure may be temporarily increased while still allowing normal pressure to be resumed,when pressure levels return to the normal (rated) range.
It is not guaranteed to have no impact on functionality in the case of repeated pressure or static pressure increases lasting 10 minutes or more.

ItemDescription
Absolute pressure/low pressure range products

Medium/high pressure range products

Model number

ER31-0□8

ER31-0□4

Wetted parts
material

Diaphragm material: SUS316L
Joint: SUS316L

Diaphragm material: SUS630
Joint: SUS304Sealed liquid

Silicone oil̶Connection thread

R1/4, G1/2A (Cutting-edge diaphragm)

R1/4, G1/4A, G3/8A

Measuring ﬂuids

Air, water, oil (non-corrosive gas or ﬂuid)

Degree of contamination

Standard IEC60664 Class code 2

Operating altitude

Altitude 2,000 m or less

Operating temperatureand humidity range-10 to 60 C, 85 % RH or less (no freezing or condensation)

Power supply

Wireless power supply (battery-less)Wireless system

RFID（NFC Tag 13.56 MHz, ISO/IEC 14443 Type B）

Protection code

IP65 (with air inlet port)

Transmitted data

Pressure, temperature*2, serial No., TAG No., pressure range, peak hold value

Function

Zero adjustment, zero adjustment clear, peak holdResponse speed

2 s or lessCommunication distance

2 mm or less (smartphone), 8 mm or less (transmission output 200 mW products)

Vibration resistance

100 m/s2 (10 to 2000 Hz)

JIS C 60068-2-6-2010

Impact resistance1000 m/s2 (6 ms, 3 times in each direction)

JIS C 60068-2-27-2011

Applicable standards

CE (EU RoHS directive, EU RE directive)

WeightApprox. 100 g*2 Temperature data is a reference value (temperature inside the case). Please use within the operating temperature range (-10 to 60 C).
This product does not emit radio waves, but it may be subject to the radio law in each country. Please use it after conﬁrming the applicable standardsof this product and the radio law of the country of use. (Available in Japan, USA and EU countries)• Smartphone (Android) dedicated application
Description

Item
Application name

RFID Sensor (Please download from the Google Play Store.)

OSAndroid 5.1.1 or above

Data reading screen

Status, TAG No., pressure display, temperature display, zero adjustment function, logging enabled/disabled

Setting screen

Status, TAG No., peak hold display, pressure range display, TAG No. change function, zero adjustment reset function, serial No.

Function

Logging function

Management

Transmitted data is saved as a CSV ﬁle.

Battery-Less Pressure Sensor■ Compliant with NFC Type B standard

Free release■ Smartphone (Android) dedicated application• Measuring values can be read with smartphones (with NFC),
commercially available RFID readers and writers (NFC Type B
specifications).

• Measurement value data is acquired for each S/N by touching the product.
• Easy to confirm of pressure and ambient temperature on site and therecorded value can be converted into data.

How to use

Smartphone (Android) dedicated application

Smartphone and tablet terminal (with NFC)

[Data reading screen][Setting screen](OS: Android 5.1.1, iOS 13 or later)*
2 mm or less

Peak holdPressure
range

Check the position of the RFID/NFC
receiver on the smartphone, align itwith the center of the top of theER31, and then touch it.

Dataaccumulation
ON/OFF* You can read pressure data with a general-purpose NFC application.
Smartphone (Android) dedicated application has been released free of charge.

To setting
screenTagNo. setting
Alphanumeric, 8 characters

Zero adjustment

RFID reader (Option)* The number of digits displayed for pressure varies depending on the range.
The image is displayed in the 1 MPa range.

(NFC Type B specification, transmission output 200 mW)[Example of CSV data output]

RFID reader

8 mm or less

RFID antenna

Zero adjustment
reset

TAG No. Measurement dateand time

Measurement data

* Please prepare a smartphone (tablet) by yourself.

Dimensions

Unit: mm•Absolute pressure/low pressure range products: Wetted parts material (Diaphragm: SUS316L, Thread: SUS316L)[Cutting-edge diaphragm]

48.5

O-ring (P18) mounting part*
16

Material identification groove(SUS316L)
R1/4

1027 Hex.

4 1027 Hex.

URE SENSOR TYPE:ER31-0W8〜35 kPa S/N:19100001
SO/IEC 14443 TYPE B

3.5

UURE SENSOR TYPE:ER31-078〜35 kPa S/N:19100001
SO/IEC 14443 TYPE B

NFC Tag antenna surface

(48)

ø30

NFC Tag antenna surface

ø17.5
ø26.4

G1/2A

(ø22)

ER31-078(3)

ø30(16)[Standard]

Cutting-edge diaphragmER31-0W8* The O-ring should be prepared by theuser according to the measuring object.

•Medium/high pressure range products: Wetted parts material (Diaphragm: SUS630, Thread: SUS304)
ø3048.5

NFC Tag antenna surface

(ø8)
(ø22)

Throttle ø0.7
Tightening torque 6N·m

ER31-074

O-ring(ø8)

JIS B 2401 1B-P11

ø19

ER31-0B4

Throttle ø0.7
Tightening torque 6N·m

16

12

1 or less

161 or lessR1/424 1027 Hex.

1 or less

URE SENSOR TYPE:ER31-074〜0.5 MPa S/N:19100001
SO/IEC 14443 TYPE B

O-ring(ø8)

JIS B 2401 1B-P14(ø22)

ER31-0C4

Throttle ø0.7
Tightening torque 6N·m

Battery-Less Pressure Sensor
Model number conﬁguration Please specify the model number and each specs for ordering.

Absolute pressure/low pressure range products
Model name

ER310

Battery-less pressure sensor①8②7③④Model number

8⑤⑥⑦⑧

Selective spec.

⑨①Wirelesscommunicationsystem⑫⑬⑭⑮

Protection class: IP65
Power supply: Wireless power supply

RFID

0②Connection③Wetted partsmaterial

7R1/4W

G1/2A (Cutting-edge diaphragm type)
8Diaphragm material: SUS316L, Joint: SUS316L (Sealed liquid: Silicone oil)

④Pressure range

Please specify the pressure
range separately for ordering.

1-20 to 20 kPa (compound range)

2-50 to 50 kPa (compound range)

3-100 to 100 kPa (compound range)

4-100 to 200 kPa (compound range)

5-100 to 300 kPa (compound range)

6-100 to 0 kPa (negative pressure range)

70 to 35 kPa

80 to 50 kPa

A

0 to 100 kPa

B0 to 200 kPa

C0 to 300 kPa

D0 to 120 kPa abs. (absolute pressure range)⑤Accuracy

7* Only Yes or No is available for Documents. Please provide
separate speciﬁcations in regards to the content.
* For any special speciﬁcations outside of those described above,please contact us for an estimate.

± (1.0 %F.S.+1digit) (at 23±2 ℃)⑨Measures against
surge pressure(Throttle)

This product does not emit radio waves, but it may be subject
to the radio law in each country. Please use it after conﬁrming
the applicable standards of this product and the radio lawof the country of use. (Available in Japan, USA and EU countries)•Standard type⑪

Additional spec. (option)[Standard specifications]
Wireless system: RFID (NFC Tag 13.56 MHz, ISO/IEC14443 Type B)
Reading device: Smartphone, tablet terminal, RFID reader, etc.

ER31

⑩8⑩Treatment⑮Documents

Nil
0

Nil

1

Use no oil

2

Use no water

3

Use no oil & water
0

Nil

1

Required•Cutting-edge diaphragm typeFor medium/high pressure range products,
please see the next page.

Model number conﬁguration Please specify the model number and each specs for ordering.

Medium/high pressure range products
Model name

ER310Battery-less pressure sensor①4②7③④Model number
ER31⑤⑥⑦⑧⑨

Selective spec.

⑪⑫⑬⑭⑮

Additional spec. (option)[Standard specifications]
Wireless system: RFID (NFC Tag 13.56 MHz, ISO/IEC14443 Type B)
Reading device: Smartphone, tablet terminal, RFID reader, etc.

①Wirelesscommunicationsystem⑩

Protection class: IP65
Power supply: Wireless power supply

RFID

0②Connection

Operating max. pressure range
7R1/4

50 MPaB

G1/4A

10 MPaCG3/8A

50 MPa③Wetted partsmaterial

4Diaphragm material: SUS630 (17-4PH), Joint: SUS304,Hard NBR (depending on screw size)④Pressure range

Please specify the pressure
range separately for ordering.

⑤Accuracy

E-0.1 to 0.5 MPa (compound range)

F-0.1 to 1 MPa (compound range)

G-0.1 to 2 MPa (compound range)

H

0 to 0.5 MPa

J

0 to 1 MPa

K

0 to 2 MPa

L

0 to 3.5 MPa

M

0 to 5 MPa

N

0 to 10 MPa

P

0 to 20 MPa

Q

0 to 35 MPa

R

0 to 50 MPa
7

Not available for G1/4A± (1.0 %F.S.+1digit) (at 23±2 ℃)⑨Measures against
surge pressure(Throttle)* Only Yes or No is available for Documents. Please provide
separate speciﬁcations in regards to the content.
* For any special speciﬁcations outside of those described above,please contact us for an estimate.
This product does not emit radio waves, but it may be subject
to the radio law in each country. Please use it after conﬁrming
the applicable standards of this product and the radio lawof the country of use. (Available in Japan, USA and EU countries)⑩Treatment

8Nil

FS45C

GSUSXM7⑮Documents

0Nil

1

Use no oil

2

Use no water

3

Use no oil & water
0

Nil

1

Required

The contents in the catalogue are subject to change without notice.

URL : https://www.naganokeiki.co.jp/
HEAD OFFICE & OVERSEAS SALES DEPT
1-30-4, HIGASIMAGOME OHTA-KU, TOKYO, JAPAN.
PHONE : +81-3-3776-5328 FAX : +81-3-3776-5447
E-mail : overseas_sales_dept@naganokeiki.co.jp
PRINTED IN JAPAN 21.08.0000B（SUN）