Temperature sensors

Hygroclip (Air temperature & Relative Humidity)

Pessl Instruments Hygroclip (Air Temperature and Relative Humidity)​

Order number: 600149 / 900074 (IMT), 600148 / 900073 (µMETOS; ECO D3)

Measures relative humidity and temperature with outstanding accuracy and
repeatability. It has an integrated data acquisition and calibration history. Dew
point , VPD and delta T calculations available

FEATURE VALUE
Temperature sensor
PT1000 1/3 Class B
Humidity sensor
ROTRONIC Hygromer® IN-1
Accuracy with standard adjustment profile
at 23°C and 10, 35, 80% rh ±0.8% rh / ±0.1°C
Accuracy with high precision adjustment profile
at 23°C and 10, 20, 30, 40, 50, 60, 70, 80, 90% rh ±0.5% rh / 0.1°C
Resolution, AirChip3000
Typically 0.02% rh, 0.01°C
Long-term stability
< 1% rh, 0.1°C / year
Humidity response time t 63
3 seconds
Measurement range
0…100% rh, -100…200°C
Electronics operating range
-50-100°C and 0-100% rh
Output signals
Serial port UART
Audit trail & electronic records
FDA 21CFR Part 11 and GAMP compliant
Power supply & consumption
3.2 V / 4 mA
Housing/probe material
Polycarbonate
Filter
Polyethylene insert, polycarbonate cage
Standards
CE-compliant 2007/108/EG

Pessl Instrument Air Temperature & Relative Humidity Sensor

PI Humidity

Order number: 600019 / 900026 (µMETOS), 600009 / 900021 (LoRAIN)

Measures air temperature and relative humidity and is used for low power consuming
applications on μMETOS.
I2C Bus Considerations: I2C Bus is sensitive to the electromagnetic waves and can
be distorted under certain conditions. On the contrary, Hygroclip is less sensitive.
Recommended cable length: no longer than 1 m.

FEATURE VALUE
Sensor
HYT221
Operating temperature range
-40°C to +125°C
Humidity range
0% to 100% RH
Accuracy
±0.2°C (0°C to +60°C)
±2 % RH at +23 °C (0% to 90% RH)
Operating voltage
2.7V to 5.5V
Digital interface
I²C, address 0x28 or alternative address
Operating voltage (limit data)
0.3 V to +6 V
Storage conditions
-20 °C to +50 °C

Pessl Instrument Air Temperature & Relative Humidity Sensor with a longer (5 m) cable

Pessl Instruments air temperature and relative humidity sensor – with a longer (5m) cable

Order number: 600019 / 900026 (µMETOS), 600009 / 900021 (LoRAIN)

Measures air temperature and relative humidity with additional calculation of virtual
sensors like dew point, VPD and delta T. The sensor is used for low power consuming
applications on μMETOS.
Application: when long distances up to 15 m from the main station are required i.e.
in greenhouses in/out, when two or more sensors are needed

FEATURE VALUE
Sensor
HYT221
Cable lenght
5 m
Operating temperature range
-40°C to +60°C
Humidity range
0% to 100% RH
Accuracy
±0.2°C (0°C to +60°C)
±2% RH at +23°C (0% to 90% RH)
Operating voltage
2.7V to 5.5V
Digital interface
RS485 with PI-Bus, insertable in a chain
Operating voltage (limit data)
0.3 V to +6 V
Storage conditions
-20°C to +50°C

PESSL INSTRUMENTS WET AND DRY BULB TEMPERATURE

Pessl Instruments wet and dry bulb temperature

Order number: 600165 / 900134 (iMETOS 3.3), 600071 / 900014 (µMETOS)

Two highly reliable and tested PT1000 are built in a waterproof housing. One of
them is covered with cotton tissue and wetted with water.

FEATURE VALUE
Sensor
PT1000
Supply voltage
4.57 – 7 V for chain version
Supply current
max. 200 μA
Short circuit protection
infinite (within supply voltage range)
Short circuit supply current
max. 40 mA
Operating temp. range
-30° C to +60° C
Accuracy
0.1 °C
Cable length
5 m

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