EMT1

Manostar transmitter
List ofproducts

WO81

WO71

EMT1
RoHS

High-accuracy fine differential pressure transmitter• Thirty-three variations in the ranges of 10 Pa to 100 kPa and ± 10 Pa to ± 5 kPa• The displacement sensor employs a high-performance diaphragm and a differentialinductance method.
• Frequently delivered to a highly advanced differential pressure control field, this producthas achieved a good track record.

FR51A

MS99

MS99S

MS61A-RA

QDP33

EMT1A type

EMD8A

<Main application fields>

EMTGP1

EMT1H

EMT6

EMP5A

• Nuclear facilities• Food-related factory management
equipment• Air conditioning control equipment ina high-rise building• Hospital and medical facilities• Automotive manufacturing/semiconductor manufacturing lines• Control of air discharge pressure
from the coffee roaster

EMT1A(Exposed terminal type)Pressure range code

Product code

EMD7

EMT1

EMT1B type(Indoor drip-proof type)

0FM

D

100(Example)
RangeUnitDEPakPaBase

FVFM

For vinyl pipe
For metallic pipe

0123
4

Two-wire type 4–20 mA DCAB

Indoor drip-proof type<Usage>• Room pressure measurement in aclean room
• Detection of clogging of air filters• Measurement of airflow rate/speedof ventilation/exhaust device andothers

OutputExternalshape*(Refer to pages 114 to 117)

◆When making an inquiry or placing an order, specify the above product code.
◆When you use this product for airflow rate/airflow speed measurements, weneed to obtain the specifications of the pressure detection side.
Fill out the airflow rate/airflow speed specification document preparation sheet
on page 15, and inform us of the data.

EMRT1Maximum value(for ± range, provide “±” as well)

Four-wire type 4–20 mA DC
Four-wire type 0–1 mA DC (non-standard model)
Four-wire type 0–5 V DC (non-standard model)
Four-wire type 1–5 V DC (non-standard model)
Exposed terminal type

Overview of structure
HWS15A

121

112

13

Accessories
Application

Precautions
Maintenance

3
10
7

96

877

4

5

NumberName

1

Cover

2

Terminal box

3

Housing

4

Base

5

Diaphragm

6

High-pressure side base7

Low-pressure side base

8Core9Coil bobbin

10

Substrate

11

Terminal block

12Grounding terminal screw

13

Cover packing

EMT1

Manostar transmitter
EMT1

List ofproducts

Specifications

WO81
Indoor drip-proof type

Model

EMT1A

Pressure unit

Pa, kPa

Pressure measurement
methodDifferential pressure method

Measured gas

Air and noncorrosive gas (liquid cannot be measured)

Pressure-receiving
element

Diaphragm (silicone rubber)

Exterior material

Aluminum die casting Painting on exterior (paint color: gray)

Instrument bodywithstanding pressure

500 kPa (refer to page 118)

Mounting orientation

Horizontal (inclination angle of within ± 5°)

Electric signal
conversion method

Variable inductanceInsulation resistance

Between terminal and case: 20 MΩ or higher (500 V DC megger)

Operating ambient
temperature

0°C to 50°C (no freezing allowed)

Operating ambient
humidity

90% RH or below (no condensation allowed)

Pressure range
code

Pressure range

Ｄ100–10 Pa

Ｄ150–15 Pa

Ｄ200–20 Pa

Ｄ300–30 Pa

Ｄ50

0–50 Pa

Ｄ750–75 Pa

Ｄ 100

0–100 Pa

Ｄ 150

0–150 Pa

Ｄ 200

0–200 Pa

Ｄ 300

0–300 Pa

Ｄ 500

0–500 Pa

Ｄ 750

0–750 Pa

Ｄ 10000–1000 Pa

Ｅ

20–2 kPaＥ

30–3 kPaＥ

50–5 kPaＥ

100–10 kPa

Ｅ200–20 kPa

Ｅ300–30 kPa

Ｅ500–50 kPa

Ｅ 100

EMT1B
Durable vibration

5 to 10 Hz, total amplitude of 10 mm,
10 to 50 Hz, acceleration total amplitude of 39 m/s2 (two hours
each for three axial directions)

Durable impact

100 m/s2 (six times each for three axial directions)Compatible pipe

• Vinyl pipe or rubber pipe (inner diameter of 6 mm)……Compatible with base for vinyl pipe
• Metallic pipe (outer diameter of 6 ± 0.1 mm)……Compatible with base for metallic pipe
• Hard plastic pipe (outer diameter 6 mm × inner diameter 4 mm)……Separately sold inner sleeve set (refer to page 95) is
necessary for the base for metallic pipe.

Mass−10 to +10 Pa

Ｄ ＋－ 20−20 to +20 Pa

Ｄ ＋－ 30−30 to +30 Pa

50−50 to +50 Pa

Ｄ ＋－ 100−100 to +100 Pa

Ｄ ＋－ 200−200 to +200 Pa

Ｄ ＋－ 300−300 to +300 Pa

Ｄ ＋－ 500−500 to +500 Pa

Ｄ ＋－1000−1000 to +1000 Pa

Ｅ ＋－

2

−2 to +2 kPa

Ｅ ＋－

3

−3 to +3 kPa

Ｅ ＋－5−5 to +5 kPa

EMT1A: approx. 1100 g, EMT1B: approx. 960 g

WO71

FR51AMS99MS99S

MS61A-RA

Accuracy(at 20°C)

Temperature
characteristics(zero + span)
at 0°C to 40°C

±2% FS±0.2% FS/°C

Withstanding pressureof pressure-receivingelement(Refer to page 118)

Output and transmission method

QDP33

EMD8A

EMD710 kPa

EMT1

EMTGP1
Two-wire type:Output signal of 4 to 20 mA DC±1% FS±0.1% FS/°C

EMT1H(load resistance of 500 Ω or lower)
Power voltage of 24 V DC ± 10%40 kPa(ripple of 0.2 V P-P or lower)

Four-wire type:

EMT6

EMP5A

Output signal of 4 to 20 mA DC
100 kPa0–100 kPa

Ｄ ＋－ 10

Ｄ ＋－

Exposed terminal type

150 kPa(load resistance of 500 Ω or lower)

50/60 Hz
±2% FS

Approx. 2 VA

±0.2% FS/°C

EMRT1Power voltage of 100 V AC ± 10%,

HWS15A

Accessories
10 kPaApplication±1% FS

Precautions±0.1% FS/°C

Maintenance

20 kPa◆Use of this product in a mounting orientation other than the horizontal orientation is impossible.
◆When using this product in a combustible gas atmosphere, use intrinsically safe type EMT1H described on page 85.
◆For the use environment, refer to page 118.

78

EMT1Manostar transmitterîĳ6ORWWHGKROHIRUPRXQWLQJXVH

100

88116

MS99100îĳVORWWHGKROHIRUPRXQWLQJXVH

100

88±0.388

FR51A

EMT1B type (exposed terminal type)88±0.3116±0.3

EMT1A type (indoor drip-proof type)

116

WO71

External dimension drawing

100

WO81

EMT1

116±0.3

List ofproductsîĳ KROH
RUî0WDS

MS99S

îĳ KROH
RUî0WDS

3DQHOFXWWLQJ

MS61A-RA

3DQHOFXWWLQJ

ＭWHUPLQDOVFUHZ*LQWHUQDOWKUHDG

94
φ7

HIGH

LOW

φ7

HIGHLOW

EMD7323291

EMD8A

115

QDP335555

EMT1Terminal connection diagram
EMTGP1EMT1H

Two-wire type
±P$&KHFNWHUPLQDO

12Four-wire type
EMT1

EMT643

±P$

15HFHLYLQJGHYLFH29'&SRZHUVRXUFH

EMP5A

EMRT1

HWS15A

5HFHLYLQJGHYLFH

3*URXQGLQJ◆For details of the combination of the fine differential pressuretransmitter with our receiving instrument, adjustment meter, or otherdevice, refer to page 113.
◆For wiring and the connection between the fine differential pressuretransmitter and our receiving instrument, refer to page 96.

When an ammeter with an internal resistance of 10 Ω or lower isconnected to the check terminal, it is possible to monitor the output
signal even during operation.
◆When this instrument is used in combination with our receiving
instrument, a separately installed DC power source is notnecessary because the receiving instrument has a built-in
DC power source for a two-wire type fine differential pressuretransmitter.
(Refer to pages 96 and 113)4

±P$

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EMT1！
CautionTerminal screw tightening torque: 1.0 to 1.3 N·m
Do not tighten to a torque that exceeds the specified value because
doing so breaks the instrument body.

Accessories

Maintenance● Output signal of 4 to 20 mA DC%LDVHGSUHVVXUHUDQJH
201240503UHVVXUH )679=HURFHQWHUUDQJH
2XWSXWVLJQDO P$Precautions

Transmission output diagram(pressure-output signal)
2XWSXWVLJQDO P$Application

100

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Manostar transmitter
EMT1

List ofproducts

EMT1 accessories

RoHS

WO81

VT baseMT base(Auxiliary item)

MTW base

Terminal cover set(Auxiliary item)

WO71

FR51A
Item number

KGAT1VTMaterial

Item number

Brass

KGAT1MTA vinyl pipe or rubberpipe with an innerdiameter of 6 mm can beconnected.
This is already installedat the time of purchase of
the FV type.

Material

Item number

Brass

KGAT1MTW-S

Material

Item number

Stainless steel

TCA-T1This is used to connect astainless steel pipe with anouter diameter of 6 ± 0.1 mm.

A metallic pipe, such as steel pipe
and aluminum pipe, with an outer
diameter of 6 ± 0.1 mm can beconnected.
When connecting with a plasticpipe (outer diameter 6 mm × innerdiameter 4 mm), remove the brasssleeve and use the separately soldresin inner sleeve set (XIN 6 × 4;
refer to page 111).
This is already installed at the time ofpurchase of MT type.

Material

Polycarbonate/brassThis is used to protect theterminal screw of EMT1B
type (exposed terminaltype).

Item
numberBase tightening torque: 1.2 N·m
Do not tighten to a torque that exceeds the specified valuebecause doing so breaks the instrument body.

！
CautionMaterial

Color ofrubberbushingAC4‒2T
AC4‒3T

MS99S

MS61A-RA

Plastic gland (Ace Service Co., Ltd.)This is used when the wiring of the fine differential
pressure transmitter is conducted with instrumentation
cables. By paying attention to the finish outer diameterof the cable to be used, select a plastic gland fromthe table on the right in a size that allows the rubberbushing to retain the cable outer diameter when thecap nut is tightened.

MS99

Polyacetal

AC4‒4T

QDP33

EMD8A

Outer diameter of compatible
electric wire (mm)Minimum Maximum

Black

6．
5

9．
0

Red

8．
5

11．
0

Green

10．
0

12．
5

EMD7EMT1

Adapter for conduit
25C 1922

Item number

ADPA-EMT1

EMTGP16FUHZIRUHOHFWULF
ZLUHFRQGXLW

φ 15

10G 1/2

When conducting wiring to the fine differential
pressure transmitter by passing the wire throughthe thin steel electric wire conduit with a nominal
size of 19 or a metallic flexible electric wire
conduit, because the service entrance of thetransmitter has a G1/2 internal thread and adifferent size, use the adapter for the conduitshown in the figure on the right.

EMT1H

Material

EMT6Brass

Bracket for mounting on vertical wall surface*Mounting screw is not included.

Be sure to install the fine differential pressuretransmitter in a horizontal orientation (at inclination
angle of 5° or less). When the mounting surface isvertical, mount the instrument horizontally by using
the bracket for mounting on vertical wall surface.
For the purpose of adjustment and maintenance,
secure a space of 0.5 m at minimum above the finedifferential pressure transmitter.

LOW

HIGH

EMRT1135

HWS15A

Accessories

135

25

Application100Precautions55

PRU
PRUH

8×φ5 fine differential pressuretransmitter mounting hole

1.6

When the orientation of the base of thefine differential pressure transmitter isorthogonal to the wall surface

9HUWLFDOZDOOVXUIDFHPRU
PRUH

9HUWLFDOZDOOVXUIDFH

When the orientation of the base of thefine differential pressure transmitter isin parallel to the wall surface

φ30 (hole)

EMP5A

110

Maintenance

4×φ7 wall surface mounting hole

Item number

Material

BRKT-T1GP1Steel*For quality improvement or for another reason, part of the specifications may be subject to change without prior notice.

80

Warranty■Warranty period
The warranty period for our product is one (1) year from delivery to the location specified by the orderer who makes a direct transaction
with us.

■Scope of warranty
If any failure or defect attributable to us becomes clear during the above warranty period, we will repair the product or supply asubstitute product free of charge. However, even during the warranty period, we will exclude the product from the scope of the warranty
if the failure or defect corresponds to any of the following:(1) The failure or defect was caused by an unreasonable condition, environment, handling, or usage not mentioned in theinstruction manual, specifications, and our product catalog.
(2) The failure or defect was caused by a factor other than our product.
(3) The failure or defect was caused by a modification or repair conducted by a party other than us.
(4) The failure or defect was caused by an event that could not be foreseen at the scientific and technical levels at the time of
product shipment from us.
(5) The failure or defect was caused by an external factor not attributable to us, such as acts of God and disasters.
Please note that the warranty mentioned here means the warranty for our individual product, and damage provoked by a failure or
defect of the product is excluded from the scope of the warranty.
*This warranty is valid only in Japan.

Application and usage
Our products are designed and manufactured as general-purpose instruments for general industries.
Therefore, our products are not intended for the following uses, and our products used in such a manner are outside the scope ofapplication.
(1) Equipment that is anticipated to greatly affect lives and properties, such as nuclear power generation, aviation, railways, marine
vessels, vehicles, and medical devices(2) Utilities that include electricity, gas, and service water(3) Use in outdoor locations and under similar conditions or environments other than those stipulated in the instruction manual(4) Usage to which considerable safety consideration and attention equivalent to (1) and (2) above need to be given

Service■Scope of service
Because the product price does not include service expenses, such as the dispatch of engineers, we will separately charge for theexpenses in the following cases:(1) Instruction for installation and adjustment and a witnessed test run(2) Maintenance inspection, adjustments, and repairs(3) Technical guidance and technical education(4) Witnessed inspections of products at our factory<<Note>> The product specifications and information in this catalog are subject to change without prior notice for product improvement orother reasons.

●For order placement, contact

Generalagent

Manostar Shop Co., Ltd.

1-2-3 Nishishiriike-cho, Nagata-ku, Kobe City, Hyogo 653-0031
TEL. +81-78-621-7000 FAX. +81-78-621-7788

Manufacturer

Yamamoto Electric Works Co., Ltd.

1-2-3 Nishishiriike-cho, Nagata-ku, Kobe City, Hyogo 653-0031
TEL. +81-78-631-6000 FAX. +81-78-631-6020

SEPTEMBER 2021 YAMAMOTO ELECTRIC WORKS CO., LTD., JAPAN