Product guide
19
Humidity and Dew-Point Instruments
Please note: Michell Instruments adopts a continuous development program which sometimes
necessitates specifi cation changes without notice. Please contact us for latest version.
www.michell.com
HVAC / Environmental Control
Accessories and Spare Parts
Mounting clip 2510387
Molded polymer fi tting 3401135
Fixing collar 3420085
SS sintered fi lter H4
ABS cap slotted with PTFE fi lter, white Z2
Hygrosmart with Pt100 output (RH = 0.2-1 V) I7-4-00-1
Hygrosmart with Pt100 output (RH = 0-1 V) I7-0-00-1
Issue No: PF211_97180_V2_UK_1110
PF211
HVAC Relative Humidity Probe
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PF211 relative humidity probes are equipped with the
Hygrosmart relative humidity sensor/converter. This
interchangeable module has miniaturized electronics and
does not require recalibration.
Highlights
• Designed for HVAC and Environmental Control
applications
• Based on the interchangeable Hygrosmart module
Technical Specifi cations
Performance
Measurement range (RH) 0–100% RH
Measurement range (T) -30 to +70°C (-22 to +158°F)
Accuracy at 23°C (73°F)
Humidity
<±2% RH (5–95% RH)
Accuracy at 23°C (73°F)
Temperature
±0.2°C (±0.36°F)
Stability – RH Sensor <±1% RH/year
Response time – RH Sensor <10 sec typical (for 90% of the step
change)
Electrical output/input
Output signal (RH) 4–20 mA, 0–10 V
Output signal (T) 3-wire 1/3 DIN Pt100 direct
Supply voltage 10–32 V DC for 4–20 mA output
15–32 V DC for 0–10 V output
24 V AC ±10% (PF211B)
Load resistance Output 4–20 mA: Rload < (Uv-9)/0.02
Output 0–10 V: R > 1K
Current consumption 20 mA max
Operating conditions
Operating temperature
Probe, Housing, Storage -30 to +70°C (-22 to +158°F)
Mechanical specifi cation
Ingress protection IP54
Housing material ABS
Dimensions L=175mm, ø19mm (L=6.89”, ø0.75”)
Weight 184g (6.49oz)
Electrical connections 5 or 6-wire output cable, 3m (9.8’)
INTERCHANGEABLE
MODULE
HYGROSMART ®
Dimensions