Temperature sensors

Pessl Instrument Air Temperature & Relative Humidity Sensor - 1 meter cable

ABOUT
TECHNICAL SPECIFICATIONS

Order number: 600019 (µMETOS), 600009 (LoRain), 600018 (METOS 5)

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

ABOUT
TECHNICAL SPECIFICATIONS

Order number: 600174

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

ABOUT
TECHNICAL SPECIFICATIONS

Order number: : 600165 (IMT), 600192 (µMETOS, METOS 5)

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