Product guide
57
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
RS422/485 to PC (RS232) converter 330185
USB cable/software for confi guration
F035263
Al mounting fl ange for ø12mm (0.47") SS probes
FLA012
SS sintered fi lter
H3
SS sintered fi lter with tefl on coating
J3
SS mesh fi lter
K8
PEEK protection cap with SS mesh fi lter
K9
SS probe, cover & mesh fi lter, 2m (6.56') cable
USTE002
SS probe, cover & mesh fi lter, 2m + 2m
extension (6.56’ + 6.56’) cable
USTE005
SS probe, cover & sinter fi lter, 2m (6.56') cable
USTE006
SS probe, cover & sinter fi lter, 2m + 2m
extension (6.56’ + 6.56’) cable
USTE007
PEEK probe, cover, SS mesh fi lter, 2m (6.56') cable
USTE008
PEEK probe, cover, SS mesh fi lter, 2m + 2m
extension (6.56’ + 6.56’) cable
USTE009
You can check your hygrometer with the Control Kit HKC which
is based on the principle of non-saturated salt solutions. Refer
to technical data sheet CONTROL KIT
HKC
WR293
Digital Relative Humidity and Temperature Transmitter - Remote Probe
for High Temperatures
The WR293 relative humidity transmitter uses the Hygrosmart
module, integrated in the interchangeable probe. This device
can be used in high-temperature applications due to the
remote measurement element and its small overall size. The
interchangeable probe allows for simple recalibration and
lower maintenance costs.
Highlights
• Three outputs
• Analog and digital output standard
• Interchangeable probe
• Analog output signals selectable through software
• Metric or US measurement units selectable through
software
• Available with calculated absolute humidity, dew-point,
frost point, mixing ratio or specifi c enthalpy output
• Can withstand temperatures up to 200°C (392°F)
Technical Specifi cations
Performance
Measurement range (RH) 0–100% RH
Measurement range (T) -30 to +200°C (-22 to +392°F)
Accuracy at 23°C (73°F)
Humidity
<±2% RH (5–95% RH)
Accuracy at 23°C (73°F)
Temperature
±0.4°C (±0.72°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 0–1, 0–5, 0–10 V
0–20 mA, 4–20 mA, RS485
Supply voltage 15 - 27 V AC / 18 - 38 V DC
Load resistance Current output: R 500
Power consumption 1.7 W
Operating conditions
Operating temperature
Probe
Housing
Storage
-30 to +200°C (-22 to +392°F)
-30 to +70°C (-22 to +158°F)
-40 to +70°C (-40 to +158°F)
Mechanical specifi cation
Ingress protection IP65 (NEMA 4 level)
Material
Housing
Probe
Aluminum die casting
Stainless steel
Dimensions
Housing
Probe
120 x 120 x 51mm (4.72 x 4.72 x 2.00”)
L=134mm, ø12mm (L=5.27”, ø0.47”)
Weight 450g (15.87oz)
Electrical connections Screw terminals
Display resolution LCD, 2 lines x 16 characters
INTERCHANGEABLE
PROBE
HYGROSMART ®
Issue No: WR293_97194_V3_UK_0811
Dimensions