Product guide

21
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
Precision Manufacturing
Accessories and Spare Parts
HDPE fi lter A000019
Bonded seal, (DIN ISO 228) G½” (BSP) A000340
Sample block without fi lter A000350
Sample block with fi lter A000351
SF52
Dew-Point Transmitter
The SF52 dew-point transmitter from Michell Instruments can
provide 4–20 mA or voltage signal for either dew point or
absolute humidity with excellent accuracy and linearity. The
robust housing, together with an operating pressure of up to
20 bar (290 psi), makes the SF52 ideal for many dew-point
and moisture measurement applications.
Highlights
• Designed for OEM dryer applications
• Dew-point or absolute humidity output
• Flush fi tting fi lter disc for minimal fl ow disturbance
• Cost-effective dew-point solution
Technical Specifi cations
Performance
Measurement range (dew
point)
-40 to +60°C (-40 to +140°F), dew-point
temperature
Measurement range
(absolute humidity)
0 to 200 g/m
3
(0 to 87.4 gr/ft
3
)
Accuracy (dew point) ±2°C (±3.6°F) dew point
Accuracy (absolute
humidity)
0.4 to 3 g/m
3
(0.175 to 1.311 gr/ft
3
) on value
of absolute humidity
Stability <1°C / year (<1.8°F / year)
Response time <10 sec typical (for 90% of the step change)
Electrical output/input
Output signal 0–1, 0–5, 0–10 V or 4–20 mA
Supply voltage 14-30 V DC (for 0–10 V output)
8-30 V DC (for 0-1 / 0-5 V / 4-20 mA output)
Current consumption 9 mA + load current
Supply voltage infl uence ±0.005% RH/V
Operating conditions
Operating temperature
Probe, Housing
Storage
-30 to +85°C (-22 to +185°F)
-40 to +85°C (-40 to +185°F)
Operating pressure 20 bar (290 psi) maximum
Temperature coeffi cient Temperature compensated across operating
temperature range
Mechanical specifi cation
Ingress protection IP65 (NEMA 4 level)
Housing material Nickel-coated brass
Dimensions L=85mm, ø24mm (L=3.34”, ø0.94”) (max)
Filter HDPE front fi lter
Weight 320g (11.29oz)
Mechanical connections G ½” BSP (DIN ISO 228) or ½” NPT
Cable 2m (6.5’)
Dimensions
Issue No: SF52_97181_V3.1_UK_1111