TEMPERATURE/HUMIDITY TRANSDUCERSTEMPERATURE/HUMIDITY CONVERTERS
R220 Series

Temperature/Humidity Transducers

R320 Series

Temperature/Humidity Transducers

HN-GR Series Temperature/Humidity Converters
R220 SERIES TEMPERATURE / HUMIDITY TRANSDUCERS
These transducers are dry and wet bulbs typetemperature/humidity sensors with ventilating function,
which can measure temperature/humidity at calm condition.
Resistance thermometer: Pt100 or JPt100, 3-wire typeMeasuring range: Relative humidity..... 20 to 80%RH
Temperature.....
0 to 60℃
Accuracy: Relative humidity..... ±2%RH
Temperature.....
±0.3℃ at 0℃
Measuring condition: Wind speed less than 3m/sec.
Ambient temperature 0 to 60℃

R320 SERIES TEMPERATURE / HUMIDITY TRANSDUCERS
These transducers are dry and wet bulbs typetemperature/humidity sensors. Since the units are designed
to measure temperature and humidity at places where thewind velocity exceeds 3m/sec. continuously, the ventilating
function is not provided.
Resistance thermometer: Pt100 or JPt100, 3-wire typeMeasuring range: Relative humidity..... 20 to 100%RH
Temperature.....
0 to 100℃
Accuracy: Relative humidity..... ±2%RH
Temperature.....
±0.3℃ at 0℃
Measuring condition: Places where the wind velocity exceeds 3m/sec.
Ambient temperature: 0 to 60℃

HN-GR SERIES TEMPERATURE / HUMIDITY CONVERTERS
These converters indicate simultaneously both temperatureand humidity by combining with the temperature/humidity
transducers, R220 series or R320 series, and output analog
signals of 4 to 20mA.
Input signal: Dry bulb temperature and wet bulb temperature
Pt100 or JPt100, 3-wire type
Input range: Relative humidity..... 0 to 100%RH
Temperature.....
0 to 100℃
Output signal: Humidity.....
4 to 10mADC
Temperature.....
4 to 20mADC
Conversion Accuracy: Relative humidity..... ±2%RH (Above 5℃, 10%RH)
Temperature.....
±0.3℃ at 0℃1

PSE-200ATEMPERATURE/HUMIDITY TRANSDUCERS & CONVERTERS

R220 SERIES TEMPERATURE/
HUMIDITY TRANSDUCERSMODELS R220 (Standard type)
R221 (Automatic water-feeding type)
These compact and lightweight transducers are dry and wet
bulbs type temperature/humidity sensors with ventilating
function.
The units employ two platinum resistance thermometers as
temperature detecting elements for dry and wet bulbs, andconsist of a ventilating unit, detecting elements, and a watertank for wet bulb, and others. Since the water tank is
detachable and a terminal board is exposed when tilting theunits forward under the wallmount condition, the wiring,check and maintenance are very easy.
These transducers are the most suitable as measuring
sensors of temperature and humidity in warehouses, rooms,
offices and other places, and 4 types are available forvarious applications.
For places where the wind velocity continuously exceeds
3m/sec, please use R320 series transducers.
R221 series prepares strainer (with adapter) to remove theforeign substance from the feed water as an option.

MODEL R220-10

MODEL R221-10■MODELR22□−□ 0□Type0:Standard type1:
Automatic water-feeding type
Elements
1:
JPt1003:
Pt100
No. of pairs of elements
Blank : Single element typeW:
Dualcouple type

■TYPES●R220-□0 (Standard Type)
This is the basic type of the R220 series, and widely used ingeneral.
The water tank capacity is about 300ml, and it should be
refilled about every 5 days.

■CONFIGURATION●R220-□0W (Dualcouple Type)Two pairs of the resistance thermometers for wet and dry
bulbs are built-in for control and record of temperature andhumidity at the same time in temperature/humidity chambers,
etc. Each dry bulb protective tube and wet bulb protective
tube contains two pairs of resistance thermometers.

Terminal board●R221-□0 (Automatic Water-feeding Type)
This is suitable to use in high temperature or low humidity
places where water is heavily consumed. Water can besupplied continuously by connecting a pipe to a watersupply or a tank. Level detecting float switch turns on and off
an solenoid valve to keep the water level constant.

OutletFan motor
Dry bulb protective tube
Wet bulb cotton cloth
Air inlet

Solenoid
valve(Automaticwater-feeding
type only)●R221-□0W(Automatic Water-feeding and Dualcouple Type)
This automatic water-feeding type is provided with two pairsof the resistance thermometers for dry and wet bulbs forcontrol and record of temperature and humidity.

Water inlet(Automaticwater-feeding
type only)

2

Float switch(Automaticwater-feeding
type only)

Ventilator
Water tank

■GENERAL SPECIFICATIONS
Case:

Color:
Mounting:
Weight:■TERMINAL BOARD

Motor cover.....
Diecast aluminum
Ventilating part..... Heat-resisting ABS resin
Water tank.....
Acrylic resin
Case.....
White
Water tank.....
Semi-transparent grayVertical wallmount type
R220.....
About 1kg
R221.....
About 1.5kg●Model R220-10, R220-10W

Measuring range:
Relative humidity..... 20 to 80%RH
Temperature.....
0 to 60℃
Accuracy rating:Relative humidity..... ±2%RH
Temperature.....
±0.3℃ at 0℃
Measuring condition
Wind speed lens than 3m/sec.
Amibent tempareture 0 to 60℃
Resistance thermometer:
Pt100 or JPt100, 3-wire type
Water tank capacity:
About 300ml

Dry
Wet*

Wet

Dry*

Source*R220-□0W Only
●Model R221-10, R221-10W

Ambient temperature:
0 to 60℃
Power supply:
100V AC or 200VAC, 50/60HzPower consumption:
R220.....
About 11VA
R221.....
About 21VA
Accessories:
8-conductor cord (Model WP81)..... 5m or 10m
Cotton cloth for wet bulb.....
5 sheets
Options:
Strainer and adapter

Dry
Wet
Wet* S.W.Contact
Dry*

Source*R221-□0W Only

■EXTERNAL DIMENSIONS●Model R220-□0, R220-□0W●Model R221-□0, R221-□0W
Solenoid valve

137

113

24

Water inlet

about 110
●Strainer●Adapter
26

9

64

φ
10
.6

43

45

75

2-R1/425
φ

Air inlet

17

42
106
118
128

Hexagon bolt
R1/8

S

.5

Water
tank

S

31

75

24

117

51

Fixed withtwo 5φscrews

φ °
8

R1/4

10

7

10

27

Unit : mm

3

TEMPERATURE/HUMIDITY TRANSDUCERS & CONVERTERS

R320 SERIES TEMPERATURE/
HUMIDITY TRANSDUCERSMODELS R320 (Standard type)
R321 (Automatic water-feeding type)
R322 (Inside-wall mounting type)R323 (Internal pressure regulating type)
MODEL R320

These compact and lightweight transducers are dry and wet
bulbs type temperature/humidity sensors. Since the units aredesigned to measure temperature and humidity at places
where the wind velocity continuously exceeds 3m/sec, theventilating function is not provided.
The units employ two platinum resistance thermometers as
temperature detecting elements for dry and wet bulbs. Thesetransducers are the most suitable as measuring sensors oftemperature and humidity in chambers or ducts where thewind velocity exceeds 3m/sec. continuously, and 4 types areavailable for various applications. For places where is calmor the wind velocity is either below 3m/sec, or not stable,please use R220 series transducers with ventilating function.
R321 series prepares strainer (with adapter) to remove theforeign substance from the feed water as an option.

MODEL R321

■TYPES●Standard Type (R320)
This is provided with a water pot and detecting elements
inside the flange, and with a terminal box and a water tankin the outside.

MODEL R322

●Automatic Water-feeding Type (R321)
This is suitable to use in high tempareture or low humidity
places where water is heavily consumed. Water can becontinuously supplied connecting a pipe to a water supply ora tank. The water pot is provided with a level detecting float
switch which turns on and off a solenoid valve to keep thewater level constant continuosly.
MODEL R323

●Inside-wall Mounting Type (R322)
Unlike the standard and other types, the unit is mounted
inside wall. A large water pot is attached instead of a watertank.

■MODELR32□−□ 0□Type0:Standard type1:
Automatic water-feeding type2:
Inside-wall mounting type
3:
Internal pressure regulating type
Elements
1:
JPt1003:
Pt100
No. of pairs of elements
Blank : Single element typeW:
Double element type

●Internal Pressure Regulating Type (R323)
This is used in places where there is a pressure difference
between the inside and the outside. The unit is the standard
type attaching a pressure balancing tube to keep the waterlevel at the specified position in the water pot.

4

■GENERAL SPECIFICATIONS
Main body:
Mounting:
Weight:■TERMINAL BOARD

No.3 nickel-planted brass
Vertical wallmount with bolts
About 2.2kg● R320-□0
R322-□0
R323-□0

Measuring range:
Relative humidity.....
20 to 100%RH
Temperature.....
0 to 100℃
Accuracy rating:Relative humidity.....
±2%RH
Temperature.....
±0.3℃
Measuring condition:
Wind speed exceeding 3m/sec.
Ambient tempareture 0 to 60℃● R321-□0

Dry

Wet

Dry

Wet

Load

100V AC■MOUNTING HOLES
Resistance Thermometer:
Pt100 or JPt100, 3-wire type
Water pot:
R320, R321, R323....
60ml
R322.....
400ml
Ambient temperature:
0 to 60℃ (R320, R321, R323.....Outside flange)
Power supply:100VAC, 50/60Hz
Accessories: R320, R322, R323
6-conductor cord (Model WV61)..... 5m
R321
8-conductor cord (Model WP81)..... 5m
Cotton cloth for wet bulb.....
5 sheets
Options:
Strainer and adapter (Common to R221)

4-M8

154

150

Panel
cutout90
104

Unit : mm■EXTERNAL DIMENSIONS●Model R320

●Model R322
φ80
4-φ9
Element holder

Mounting
plate

FlangeElement holder
Dry-bulb
Wet-bulb
Cotton cloth
Water
pot

Dry-bulb
Wet-bulb
Cotton cloth

205

Terminal
board
cover

Terminal
box

Water
pot
Water
level

Feed pipe
111

Terminal
board

Water
level

Feed
tank
holder

1/8 Union

115
155

196
307

●Model R321

170

4-φ9

Feed tank

40●Model R323

234

4-φ9
Terminal board
cover

FlangeWater inlet
Water
level
111

Terminal
board
cover

Dry-bulb
Wet-bulb
Cotton cloth

Feed pipe

Water
pot

138

Feed
tavk
holder

Water
level
111

249

208
220

Element holder

Cotton cloth
Water
pot

FlangeSolenoidevalve

Dry-bulb
Wet-bulb

Feed tank4-φ9

Element holder

Feed pipe

1/8 Union

345
Pressure balancing
tube

Unit : mm

5

TEMPERATURE/HUMIDITY TRANSDUCERS & CONVERTERS

HN-GR SERIES TEMPERATURE/
HUMIDITY CONVERTERS
These converters indicate simultaneously both temperatureand humidity by connecting with the temperature/humidity
transducers, R220 series or R320 series, and output analog
signals of 4 to 20mA.
6 kinds of humidity unit such as absolute humidity andrelative humidity are selectable to display and output.
The humidity and temperature outputs are isolated andarbitary scalble on both outputs. Also, communicationinterface is available as an potion.

■GENERAL SPECIFICATIONS■MODEL

Input signal: Dry bulb temperature and bulb temperature
Pt100 or JPt100, 3-wire type
Input range: Relative humidity..... 0 to 100%RH
Temperature.....
0 to 100℃
Conversion Accuracy:
Relative humidity..... ±2%RH(Temperature : Above 5℃,
Humidity : Above 10%RH)
Temperature.....
0.3℃
Display:
Humidity (or wet bulb temperature).....
4-digit LED
Temperature.....
4-digit LED
Output signal: Humidity (or wet bulb temperature).....
4 to 20mADC
Temperature.....
4 to 20mADC
Load resistance: 600Ω or less, with isolator
Note: Output changes in accordance withhumidity units.
Humidity calculation:
Absolute humidity (g/m2)
Relative humidity (%RH)
Mixing ratio (g/kg)
Steam pressure (kPa)Dew point (℃)
Wet bulb temperature (℃)

HN-GR3F1□
Communication interface
N : Not provided
R : RS232C
A : RS422A
S : RS485

Alarm output: Contact output 2 points, by one common
terminal
2 points of humidity (or wet bulb
temperature) and temperature or
higher/lower limits in either humidity or
temperature.
Contact capacity
Resistive load.....
100VAC 0.5A.....
200VAC 0.2A
Hold:
Hold both display and output by external
contact signal(standard equipped tocommunication interface)Communication interface:
RS232C, RS422A or RS485 (to be specified
as an option)
Working temperature range:
0 to 50℃
Power supply: 100 to 240VAC 50/60Hz
Allowable voltage fluctuation:
85 to 264VAC
Power consumption:Maximum about 15VA
Weight:About 0.6kg

6■TERMINAL BOARD■CONFIGURATION●Recording and control of temperature and humidity

4 to 20mADC(Temperature)
R220-10

Recorder(EH, AH, EH,
AL, etc.)

Dry
Wet
4 to 20mADC
HN-GR SERIES (Humidity)

Controller 1(temperature
control)

R320-10Controller 2(humidity
control)

Alarm1

Humidity
outputAlarm24-20mADC

Wet bulb resistanse
thermomter input

Power supply
100-240VAC
50/60Hz

Conducting
groundTemparature output

Communication interface

4-20mADC(Option)Hold

Drt bulb resistanse thermomter input■EXTERNAL DIMENSIONS

Terminal cover

+0.8

92 0

0
0

96

□91-1 ×91 -1●Panel cutout

96

92 +0.8
0120

Unit : mm

7

■WET BULB TEMPERTURE CONVERSION TABLE
Dry bulb
Temperature(℃)

Humidity (%RH)

100

90

80

70

60

50

40

30

20

10

5

5.0

4.3

3.6

2.9

2.2

1.4

0.6

−0.1

−0.9

−1.7

10

10.0

9.2

8.3

7.4

6.5

5.6

4.6

3.7

2.6

1.6

15

15.0

14.0

13.0

12.0

10.9

9.7

8.6

7.3

6.1

4.8

20

20.0

18.9

17.7

16.5

15.2

13.8

12.4

11.0

9.4

7.8

25

25.0

23.7

22.4

21.0

19.5

18.0

16.3

14.5

12.6

10.6

30

30.0

28.6

27.1

25.5

23.9

22.1

20.1

18.1

15.8

13.4

35

35.0

33.5

31.8

30.1

28.2

26.2

24.0

21.6

19.0

16.1

40

40.0

38.3

36.6

34.7

32.6

30.4

27.9

25.2

22.2

18.8

45

45.0

43.2

41.3

39.3

37.0

34.6

31.9

28.8

25.4

21.4

50

50.0

48.1

46.1

43.9

41.5

38.8

35.8

32.5

28.6

24.0

55

55.0

53.0

50.9

48.5

45.9

43.1

39.8

36.1

31.8

26.6

60

60.0

57.9

55.7

53.2

50.4

47.4

43.9

39.9

35.1

29.2

65

65.0

62.8

60.4

57.8

54.9

51.7

48.0

43.6

38.4

31.9

70

70.0

67.7

65.2

62.5

59.4

56.0

52.1

47.5

41.8

34.6

75

75.0

72.6

70.0

67.1

64.0

60.4

56.2

51.3

45.2

37.3

80

80.0

77.5

74.8

71.8

68.5

64.7

60.3

55.2

48.7

40.1

85

85.0

82.4

79.6

76.5

73.0

69.1

64.5

59.1

52.2

43.0

90

90.0

87.3

84.4

81.2

77.6

73.5

68.7

63.0

55.8

45.8

95

95.0

92.2

89.2

85.9

82.1

77.9

72.9

66.9

59.3

48.7

100

100.0

97.1

94.0

90.5

86.7

82.3

77.1

70.8

62.9

51.6

Specifications subject to change without notice. Printed in Japan (I) 2011. 7

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