Setra Relative Humidity
Applications
● HVAC/R Control
● Indoor Air Quality (IAQ)
● Laboratories
● Antiquities Preservation
Sensor Line
Features
■ Key part of comprehensive
HVAC solution package
(i.e. humidity, pressure and
current)
■ Active Temperature with
Jumper-Selectable Tspan
Ranges of 40°C, 50°C
and 60°C
■ Three levels of RH accuracy:
2%, 3%, and 5%
■ Excellent reliability via
unique, proven, and
established ASIC technology
■ Robust, proven capacitive
sensor technology
■ Easy fi eld-serviceability
■ Low cost of ownership
■ High aesthetic/ low profi le
wall-mount enclosure
■ Quick-mount, 2-screw install
w/ plug-in terminal wiring
■ 5 year warranty on
electronics; 2 year warranty
on sensor module
■ CE and RoHS Compliant
Now Features
Active
Temperature
Sensing
When it comes to a product to rely
on - choose the SRH.
When it comes to a company to
trust - choose Setra.
ISO-9001 Certifi ed
800-257-3872
Visit Setra Online:
http://www.setra.com
etra’s Humidity Sensor
(SRH) family consists of a
wall mount, duct mount,
S
product l ine is desi gned to
complement Setra’s pressure and
current products while expanding
the solution opportunities for
the HVAC/building automation
market and other relative humidity monitoring applications.
All models feature removable
sensor tips, NIST traceability,
and a durable capacitive sensor
capable of full-scale 0 to 100% RH
measurement.
The SRH product line offers accurate humidity with active or
passive temperature sensing
available in ±2%, ±3%, or ±5% RH
accuracy. Humidity transmitters
configured with active temperature option feature jumper- selectable Tspan ranges of 40°C,
50°C, and 60°C.
This product suite utilizes fieldreplaceable sensor tips that allow the end user to replace the
sensors on-site. This essentially
eliminates time consuming and
costly factory calibration, while
reducing downtime during service intervals. As an example,
the duct mount probe is easily
accessed by taking off the front
cover, pulling out the probe, and
replacing the sensor tip. This
further contributes to a more
user-friendly, lower cost product
line that is focused on customer
needs and ease of use.
Setra’s humidity sensors are
the ultimate product for any
HVAC installation and, combined
with our pressure and current
products, allow us to support a
one-stop, single source for any
customer. The SRH line is a natural progression that grew out of
our high quality line of pressure
transducers that also use the
same unique ASIC coupled with
a highly reliable capacitive sensor technology. This product line
marks the capstone in fulfilling
a complete HVAC solution and
boasts the same quality, delivery,
and innovation demanded of all
Setra products.
and outside air unit. This
Features
Key component of comprehensive
HVAC/R solution
The Setra humidity/temperature solution
is an important part of our overall HVAC/R
solution which also includes pressure and
current. This bundle of products has established Setra as a premiere HVAC manufacturer and a full-solution player for HVAC
customers.
Robust, proven capacitive sensor
The unique pairing of Setra’s proven
capacitance measurement technology
with its custom ASIC (used in thousands of
pressure devices) ensures reliable measure
of RH levels from 0 to 100%. As a result,
customers will experience better resistance to contamination, longer stability,
and minimal drift.
Attractive/ low profile enclosures
Design and aesthetics have always been
considered an important ingredient in any
new Setra product. The humidity family
consists of three configurations: wall, duct,
and outside air models. Great attention
was given to the look of the wall mount,
ensuring that it complements the décor
of any building. It is a space conscious
unit that takes up no more space than an
electrical outlet. The duct and outside air
models utilize a design that ensures ease
of both assembly and probe removal for
recalibration.
Three levels of RH accuracy 2%, 3%, and 5%
There are three levels of accuracy available for Setra humidity sensors: 2%, 3%,
and 5%. The sensors should not drift more
than 1% annually but it is recommended
that the sensor be checked each year to
ensure high accuracy and dependability.
Field Serviceability
Replaceable sensor board = no
calibration and greater accuracy
Depending on the environment in
which it is being used, a transducer
may drift over time and need to
be either recalibrated or replaced.
Costs associated with recalibration
are often overlooked when selecting an RH transmitter. However,
these costs can easily outweigh
the original purchase price if not
considered on the front end.
The Setra SRH series uses a highly
accurate, reliable, and durable
sensor. However, if replacement
is needed, the interchangeable RH
sensor module can be easily removed. These computer-calibrated
sensor assemblies are cost effective
and do not require skilled technicians to perform field servicing. No
calibration is needed because each
new sensor module is factory-calibrated before shipping. Another
benefit for duct and outside air
applications is the sensor module
can be replaced without having to
remove the unit and disconnect the
wiring conduit.
Simple Installation
Easy as 1-2-3
1) Mount the wall plate in desired
position on wall (two screws).
2) Connect circuit board to wall
plate.
3) Snap cover over assembly .
Applications
● HVAC/R Control
● Indoor Air Quality (IAQ)
● Laboratories
● Antiquities Preservation
Features
■ Key part of comprehensive
HVAC solution package
(i.e. humidity, pressure and
current)
■ Active Temperature with
Jumper-Selectable Tspan
Ranges of 40°C, 50°C
and 60°C
■ Three levels of RH accuracy:
2%, 3%, and 5%
■ Excellent reliability via
unique, proven, and
established ASIC technology
■ Robust, proven capacitive
sensor technology
■ Easy field-serviceability
■ Low cost of ownership
■ High aesthetic/ low profile
wall-mount enclosure
■ Quick-mount, 2-screw install
w/ plug-in terminal wiring
■ 5 year warranty on
electronics; 2 year warranty
on sensor module
■ CE and RoHS Compliant
Low cost of ownership
As mentioned above, the replaceable sensor assembly eliminates
high labor costs associated with
field calibration. These products
were designed with the customer
in mind by combining accuracy,
dependability and accessibility into
an overall cost effective solution.
Patent No. 7,658,096
The assembly for the duct and outside air mounts is similar and outlined in easy-to-follow steps in the
installation instructions.
Now Features
Active
Temperature
Sensing
When it comes to a product to rely
on - choose the SRH.
When it comes to a company to
trust - choose Setra.
ISO-9001 Certified
800-257-3872
Visit Setra Online:
http://www.setra.com
Specifications
12.52
318
MOUNTING FLANGE
WALL/PIPE
UNIVERSAL
POROUS
WEATHER SHIELD
60.4
2.38
114.4
4.50
6.10
154.9
4.05
102.7
2.68
68
4.04
102.6
5.10
129.5
142.2
5.60
2.68
68.1
4.69
[119]
2.81
[71.5]
SECURITY LOCK
SECURITY LATCH
.98
[24.7]
RH Performance Data
Sensing Element Capacitive Polymer
Humidity Operating Range 0 to 99% RH (Non-condensing)
Accuracy @ 68*F (20°C) 2%, 3%, 5%†
Hysteresis <1.5%
Repeatability <0.5%
Long Term Stability <1% /Year @ 68°F (20°C), 50%RH
†5% units available only with passive temperature option.
Electrical Data
Signal Outputs
Current (2-Wire ) 4 to 20 mA
Field-Selectable Voltage (3-Wire ) 0 to 5 VDC, 0 to 10 VDC,
Excitation 13.5 to 30 VDC (10VDC Output)
12 to 30 VDC (4-20mA, 5VDC Output)
Maximum Load (Current Only) Ω = (Supply - 10) ÷ 0.02
Electrical Terminations Pluggable Terminal Block (5mm Pitch)
Wiring Protection Reverse Excitation
CE Compliance EMC Directive 2004/108/EC
Dimension Drawings
Wall Mount
[71.50]
2.81
[119]
4.69
[60.4]
2.38
Security Lock
[221]
[24.7]
0.98
Security Latch
S R H 1
Model
SRH1 = SRH
Replacement Sensor Assembly:
Example: Part No. SRH3-2P-T0 = 2% accuracy, RH only
While we provide application assistance on all Setra products, both personally and through our literature,
it is the customer's responsibility to determine the suitability of the product in the application.
Measurements are in [mm] & inches.
8.7
Example: Part No. SRH1-2P-W-11-T0-N-C = Wall-mount, 2% RH accuracy, 4-20 mA output, RH only, NIST Calibration Certificate
Accuracy
2P = 2%
3P = 3%
6
5P = 5%
S R H 3
Model
SRH3 = SRH6
Temperature Sensing Options
(Passive)
T1: Thermistor NTC 10K Ω @ 77°F/25°C (Direct Connect)Type II
T2: RTD Output 1000 Ω @ 32°F/0°C(Direct Connect)
385 Platinum Curve
Temperature Sensing Options
(Active)
T3: Ranges °F (°C) -58 to 140 (-50 to 60)
Accuracy @ 68°F (20°C) Typ. @ 50% ±1.1 (±0.6) *
T5: °F (°C) +14 to 140 (-10 to 60)
Physical Description
Enclosure Materials:
Wall Mount ABS 94-VO
Duct & Outside Air Polycarbonate 94-VO
Probe (Duct & Outside Air) Aluminum
Weather Shield Porous Polyethylene
Sensor Tip Filter 70 Micron Polypropylene
Dimensions See Dimension Drawings
3
3
Specifications subject to change without notice.
Accuracy @ 68°F (20°C) Typ. @ 50% ±0.7 (±0.4) *
Signal Output Options (includes humidity output)
Current 4 to 20 mA,
Field-Selectable Voltage 0 to 5 VDC, 0 to 10 VDC
* Excitation: 24 VDC ± 10%
Environmental Data
Operating Temperature °F (°C) -40 to 140 (-40 to 60 )
Storage Temperature °F (°C) -40 to 158 (-40 to 70)
Moisture Resistance IP65, NEMA-4 (Duct & Outside Air)
Solar UV Resistant (Outside Air)
Flammability Rating 94-V0
Compliance RoHS Compliant, CE Compliant
[318]
12.52
[57.15]
2.25
[28.58]
1.125
Duct Mount
[142.2]/5.60
[129.5]/5.10
[68.1]
2.68
CONDUIT KNOCKOUTS
BOTH SIDES
DUCT PROBE
(5/8” DIA.)
DUCT MOUNT
SHOWN WITH
OPTIONAL DUCT
FLANGE
Ordering Information (Code all blocks in table)
Configuration
W = Wall
D = Duct
O = Outside Air
Outputs
1
11 = 4 - 20 mA
2C = 0 - 5 or 0 - 10 VDC
(user-selectable)
Accuracy
2P = 2%
3P = 3%
5P = 5%
Temperature Outputs
T0 = None (RH only)
2
T1 = 10KΩ Thermistor (Passive)
T2 = 1000Ω RTD (Passive)
T3 = -58 to 140°F (-50 to 60°C [Active])
T5 = +14 to 140°F (-10 to 60°C [Active])
Temperature Outputs
T0 = None (RH only)
T1 = 10KΩ Thermistor (Passive)
6
T2 = 1000Ω RTD (Passive)
T3 = -58 to 140°F (-50 to 60°C [Active])
T5 = +14 to 140°F (-10 to 60°C [Active])
159 Swanson Road, Boxborough, MA 01719/Tel: 978-263-1400;
Toll Free: 800-257-3872; Fax: 978-264-0292; email: sales@setra.com
Outside Air
[154.9]
6.10
[60.4]
2.38
[114.4]
4.50
[102.7]
4.05
UNIVERSAL
WALL/PIPE
MOUNTING
FLANGE
POROUS
WEATHER SHIELD
[41.25]
[17.27]
[38.10]
1.50
[57.15]
2.25
3, 5, 6
NOTES:
3. 5, 6
1 Wall (w) configuration not available with T3 Temperature option.
2. Voltage outputs (2C) are factory configured for 0 to 5 VDC opera-
tion. User -selectable jumper for 0 to 10 VDC operation.
3. Tspan jumper factory configured for 60°C. User-selectable Tspan
for 40°C and 50°C option provided
4. Display option available ONLY in Wall mount configuration
5. SRH1 units originally ordered with either a T3 or T5 temperature
5
option MUST be replaced with the same T(x) version.
5
6. 5% accuracy units not available with active temperature option.
1.62
0.68
[76.20]
3.00
Display
N = None
Optional
Duct Flange
(Side View)
4 x
(4.57)
Ø.180
[44.45]
1.75
Order Duct Flange
Separately (P/N 888415)
4
[68]
2.68
Optional
Duct Flange
(Top View)
Options
C = NIST
Certificate of
Conformance
[102.6]
4.04
SSP-SRH Rev. C 10/19/10
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