Michell Instruments SF52 Specifications
Humidity and Dew-Point Instruments
Dew-Point Transmitters
SF52
Dew-Point Transmitter
The SF52 dew-point transmitter is a simple, cost effective
sensor designed for use in harsh industrial dryer applications
where reliability and toughness are required at an economical
cost.
The SF52 is available with a choice of G1/2” and 1/2” NPT
process connections and voltage or mA outputs. A key feature
of the unit is the recessed and protected measuring element
giving an extended sensor life cycle.
Our polymer based sensor is calibrated on a high volume
traceable calibration system, providing OEM quantities of units
on short deliveries, each with a 3 point calibration certifi cate.
Highlights
• Ideal for OEM dryer use
• Dew-point measurement range –40 to +60°C
(–40 to +140°F)
• Fast response
• Rugged IP65 construction
• 3-Point traceable calibration certifi cate
• Accuracy ±2°C (±3.6°F)
• Voltage or mA outputs
Technical Specifi cations
Performance
Measurement range –40 to +60°C (–40 to +140°F) dew point
Accuracy ±2°C (±3.6°F) dew point
Repeatability 0.5°C (0.9°F) dew point
Accuracy
(absolute humidity)
Stability <1°C (<1.8°F) / year
Calibration Traceable 3-point calibration certifi cate
0.4 to 3g/m
Electrical Specifi cations
Output signal 0 to 1, 0 to 5, 0 to 10 V or 4–20 mA (3-wire)
Output Dew point, absolute humidity
Analog output scaled
range
Supply voltage 14 to 30 V DC (for 0 to 10 V output)
Current consumption V output <9 mA
CE marked Certifi ed
Standard –40 to +60°Cdp (–40 to +140°Fdp)
–30 to +30°Cdp (–22 to +86°Fdp)
0 to 200 g/m
Non-standard available upon request
8 to 30 V DC (for 0 to 1 / 0 to 5 V / 4–20 mA
output)
mA output <29 mA
Operating Specifi cations
Operating humidity 0–100% RH
Operating temperature –40 to +60°C (–40 to +140°F)
Operating pressure 2 MPa (20 barg / 290 psig maximum)
Thermal compensation Characterized over operating range temperature
Mechanical Specifi cations
Ingress protection IP66 in accordance with standard BS EN
Housing material Nickel-coated brass
Dimensions L=85mm, ø24mm (maximum)
Filter HDPE front fi lter
Process connection G1/2” BSP, 1/2” NPT
Weight 320g (11.3oz)
Cable 2m (6.6’) of halogen-free TPE cable
Diagnostic conditions
(factory programmed)
60529:1992
NEMA 4 in protection accordance with standard
NEMA 250-2003
Condition
Sensor fault
Under-range dew point
Over-range dew point
3
on value of absolute humidity
3
Output
23 mA
4 mA
20 mA
www.michell.com
Dimensions
m
0
/
G1/2” BSP Bonded Seal
27
(1.
A
ø28.65 x 2.61mm
(ø1.12 x 0.10”)
Electrical Connections
4–20 mA connections 3-wire Voltage connections 3-wire
White Power White Power
Green Output mA Green Output voltage
Brown Common ground Brown Common ground
Humidity and Dew-Point Instruments
Dew-Point Transmitters
SF52
Ordering Codes
To construct the order code, select the relevant feature from the tables below, starting with the base model, which is {Feature A} and then add on options to create a
string: {Feature A} + {Feature B} + {Feature C} + {Feature D} + {Feature E}
Order example: SF52-TX + 2 + X + D1 + B + F2
SF52 dew-point transmitter, 4–20 mA, dew-point scaling, dew-point range –40 to +60°C (-40 to +140°F), G1/2” BSP process connection, under-range/over-range
diagnostics.
SF52-TX 2 X D1 B F2
Diagnostics {Feature F}
Base Model {Feature A}
Dew-point transmitter SF52-TX
Signal Output {Feature B}
4–20 mA (3-wire) 2
0 to 10 V 3
0 to 5 V 4
0 to 1 V 5
Output Scaling {Feature C}
Absolute humidity g/m
Dew point °C X
*
Supplied with dew-point calibration certifi cate only
3
*S
Under-range/over-range off F1
Under-range/over-range on F2
Mount {Feature E}
G1/2" BSP thread B
1/2" NPT thread N
Range {Feature D}
–40 to +60°C (–40 to +140°F) dp output D1
–30 to +30°C (–22 to +86°F) dp output D2
0 to 200 g/m
Non-standard ranges available upon request DX
3
D3
Accessories and Spare Parts
HDPE fi lter A000019
Bonded seal, (DIN ISO 228) G1/2” (BSP) A000340
Sample block without fi lter (G1/2” BSP only) A000350
Sample block with fi lter (G1/2” BSP only) A000351
Michell Instruments, Inc 319 Newburyport Turnpike, Suite 207, Rowley, MA 01969
Tel: 978 484 0005, Fax: 978 843 7669, Email: us.info@michell.com, Web:
Michell Instruments adopts a continuous development programme which sometimes necessitates specifi cation changes without notice.
Issue no: SF52_97181_V5_US_0715
© Michell Instruments 2015
www.michell.com/us
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