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PCE-555 Hygrometer
Handheld, pocket-sized hygrometer, measures humidity, temperature,
dew point and wet bulb globe temperature

This hygrometer is designed to take quicker measurements of humidity and temperature. The PCE-555 hygrometer also offers a calculation of dew point and information about wet bulb globe temperature. This allows elimination of fungus in food storage, as well as in food transportation. It is also very useful in the construction industry to determine condensation in walls. Thanks to its solid design, this hygrometer is ideal for taking measurements on site, so long as the humidity sensor is not touched, manipulated or placed directly into liquid as it is a very sensitive component.

This table perfectly illustrates the connection between dry bulb temperature, wet bulb temperature and relative humidity. This link shows another hygrometer, which is superior to this model,  with the ability to be recalibrated with two humidity standards. Here you will find an overview of all our hygrometers. 

User manual for the PCE-555 hygrometer  EC certificate for the PCE-555 hygrometer  Video for the PCE-555 hygrometer  PCE-555 hygrometer: Software.  Technical specifications for the PCE-555 hygrometer  Information for the PCE-555 hygrometer

the PCE-555 hygrometer to take quicker measurements of humidity and temperature.

PCE-555 hygrometer

Technical specifications:

Measurement ranges

0 to 100% r.h.
-30 to 100°C

Resolution

0.01% r.h.
0.01°C

Accuracy

±2.0% r.h. at 25°C
±0.5°C at 25°C

Display

dual LCD with 4.5 positions

Response time% r.h. about 10 sec. (90 % @ 25° C air temp.)

Battery

9 V battery (PP3)

Dimensions

225 x 45 x 34 mm

Weight

200 g

Examples of use for the PCE-555 hygrometer

measuring humidity in a room wth the PCE-555 hygrometer.

front view of the PCE-555 hygrometer measuring humidity outdoors.

With the PCE-555 hygrometer you can measure ambient conditions including humidity in the top portion of the LCD and temperature shown on the bottom and it also calculates wet bulb temperature and dew point, which are useful for calculating thermal stress. There is a small video to the right which shows the device measuring humidity and temperature. This link shows another hygrometer which can measure relative humidity, temperature, calculate dew point and it has memory for storing readings. We also have another type of hygrometer which can measure relative humidity, temperature, calculate dew point and also measure absolute humidity with a sensor.

Dry bulb temperature is simply the environmental temperature. It's the temperature that is measured using any kind of thermometer.
Wet bulb temperature is determined by using a mercury thermometer which is situated in the shade with the bulb covered with a piece of wet fabric under a current of air, measuring, for example, a vent or a rotating electric fan. This way, the evaporation of water absorbs heat lowering the temperature, reflecting the decrease in the temperature reading. The lower relative humidity is, the quicker the water in the fabric will evaporate and the further the resulting decrease with respect to the dry bulb temperature (this is used to give an idea of thermal sensation).
Dew point is the temperature at which air vapour turns into condensation, producing dew, mist or frost if the temperature is low enough.
This link has more information about temperature and the most common units of measurement in the international system of measurement relating to temperature.

Table for the hygrometer

Temperature with a dry thermometer

Difference of temperature between the dry and the wet thermometer (inº C) (the reading value shows the air relative humidity as a percentage (%))

Celsius degrees

0

1

2

3

4

5

6

7

8

9

10

0

100

82

64

47

31

14

 

 

 

 

 

1

100

83

66

50

34

18

 

 

 

 

 

2

100

84

68

52

37

22

 

 

 

 

 

3

100

84

69

54

40

25

12

 

 

 

 

4

100

85

70

56

42

28

16

 

 

 

 

5

100

86

72

58

45

32

19

7

 

 

 

6

100

86

73

60

47

35

23

11

 

 

 

7

100

87

75

61

49

37

26

14

 

 

 

8

100

87

75

62

51

40

29

18

7

 

 

9

100

88

76

64

53

42

31

21

11

 

 

10

100

88

77

65

55

44

34

24

14

5

 

11

100

88

77

66

56

46

36

26

17

8

 

12

100

89

78

68

57

48

38

29

20

11

 

13

100

89

79

69

59

49

40

31

23

14

6

14

100

90

79

70

60

51

42

33

25

17

9

15

100

90

80

71

61

53

44

35

27

20

12

16

100

90

81

71

62

54

46

37

30

22

15

17

100

90

81

72

63

55

47

39

32

24

17

18

100

91

82

73

65

56

49

41

34

27

20

19

100

91

82

74

65

58

50

43

36

29

22

20

100

91

83

74

66

59

51

44

37

31

24

21

100

91

83

75

67

60

52

45

39

32

26

22

100

92

83

75

68

61

54

47

40

34

28

23

100

92

84

76

69

62

55

48

42

36

30

24

100

92

84

77

70

62

56

49

43

37

31

25

100

92

85

77

70

63

57

51

44

39

33

26

100

92

85

78

71

64

58

51

45

40

34

27

100

93

85

78

71

65

59

53

47

41

36

28

100

93

86

79

72

65

59

53

48

42

37

29

100

93

86

79

72

66

60

54

49

43

38

30

100

93

86

79

73

67

61

55

50

44

39

Wet bulb definition

If we pay attention to the wet thermometer temperature (wet bulb temperature), the same wet bulb temperature is always obtained with different temperature and relative humidity combinations: for instance, the same wet bulb temperature is obtained 10ºC for 20ºC and 23% Hr or for 15°C and  52% Hr, as well as many other combinations which are shown in the table for humidity meters. This fact is very important for the operation of conditioning installations due to the fact that the air which is located can be converted into one state or another without power supply. Taking into account an air mass at  20°C to 23% Hr and transforming water in water vapour without any external power supply, relative humidity increases at the same time that temperature decreases owing to the evaporation cold. All the states obtained during the evaporation process are near the line of the constant wet bulb temperature: at 52% Hr a 10°C temperature is reached. These changes are called adiabatic and are valued in the conditioning technique.

Delivery content:
1 x PCE-555 hygrometer, 1 x carrying case, 1 x battery and user manual
technical specifications for the PCE-555 hygrometer return to homepage
Here you will find an overview of all the measuring instruments available at PCE Instruments.

Contact:
PCE Instruments UK Limited
Units 12/13 Southpoint Business Park
Ensign Way, Southampton
United Kingdom, SO31 4RF
Phone: +44 ( 0 ) 2380 98703 0
Fax: +44 ( 0 ) 2380 98703 0

This page in German the PCE-555 hygrometer in German in Italian PCE-555 hygrometer in Italian in Spanish PCE-555 hygrometer in Spanish in Croatian PCE-555 hygrometer in Croatian in French PCE-555 hygrometer in French in Hungarian PCE-555 hygrometer in Hungarian in Turkish PCE-555 hygrometer in Turkish in Polish PCE-555 hygrometer in Polish in Russian PCE-555 hygrometer in Russian in Dutch PCE-555 hygrometer in Dutch in Portuguese PCE-555 hygrometer in Portuguese in Portuguese PCE-555 hygrometer in Portuguese
 

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