SERIES CDT CARBON DIOXIDE/TEMPERATURE TRANSMITTER

SERIES CDT CARBON DIOXIDE/TEMPERATURE TRANSMITTER

SERIES RHP HUMIDITY/TEMPERATURE TRANSMITTER

Passive Temperature Outputs, Sintered Filter Options

The Series RHP Temperature and Humidity Transmitter combine the voltage or current humidity transmitter output with a passive temperature thermistor or RTD output. Featuring polymer capacitance humidity sensors, models are available in 2%, 3% or 5% accuracies. Duct mounted transmitters are available with an optional two-line alpha numeric LCD display.

For models with resistive thermistors or RTD outputs, please click here for temperature to resistance lookup tables.

NIST CALIBRATION available in Product Configurator.

Product Applications

  • Air economizers
  • Outdoor temperature and relative humidity reference
  • Pool room humidity monitoring
Starting at $125.25
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Grouped product items
Model Description Availability* Qty Price
RHP-2D2F Duct mount 2% RH/temperature transmitter with 0-10 VDC RH output and 20K NTC thermistor temperature output. 1-3 days*
$165.25
RHP-2D2E Duct mount 2% RH/temperature transmitter with 0-10 VDC RH output and 1K Ohm RTD DIN 385 temperature output. 1-3 days*
$166.15
RHP-2D2D Duct mount 2% RH/temperature transmitter with 0-10 VDC RH output and 100 Ohm RTD Curve D passive temperature output. 1-2 Weeks*
$166.15
RHP-2D2B Duct mount 2% RH/temperature transmitter with 0-10 VDC RH output and 10K @ 25°C thermistor temperature output. 1-3 days*
$165.25
RHP-2D2A Duct mount 2% RH/temperature transmitter with 0-10 VDC RH output and 10K Curve A passive temperature output. 1-3 days*
$165.25
RHP-2D22-LCD Duct mount 2% RH/temperature transmitter, 0-10 VDC RH output and 0-10 VDC temperature output, with LCD. 1-2 Weeks*
$232.50
RHP-2D22 Duct mount 2% RH/temperature transmitter with 0-10 VDC RH output and 0-10 VDC temperature output. 1-3 days*
$170.50
RHP-2D20 Duct mount 2% RH transmitter with 0-10 VDC RH output. 1-3 days*
$149.75
RHP-2D1F Duct mount 2% RH/temperature transmitter with 4-20 mA RH output and 20K NTC thermistor temperature output. 1-2 Weeks*
$165.25
RHP-2D1E Duct mount 2% RH/temperature transmitter with 4-20 mA RH output and 1K Ohm RTD DIN 385 temperature output. 1-2 Weeks*
$166.15
RHP-2D1D Duct mount 2% RH/temperature transmitter with 4-20 mA RH output and 100 Ohm RTD Curve D passive temperature output. 1-2 Weeks*
$166.15
RHP-2D1B Duct mount 2% RH/temperature transmitter with 4-20 mA RH output and 10K @ 25°C thermistor temperature output. 1-3 days*
$165.25
RHP-2D1A Duct mount 2% RH/temperature transmitter with 4-20 mA RH output and 10K Curve A passive temperature output. 1-3 days*
$165.25
RHP-2D11-LCD Duct mount 2% RH/temperature transmitter, 4-20 mA RH output and 4-20 mA temperature output, with LCD. 1-3 days*
$232.50
RHP-2D11 Duct mount 2% RH/temperature transmitter with 4-20 mA RH output and 4-20 mA temperature output. 1-3 days*
$170.50
RHP-2D10 Duct mount 2% RH transmitter with 4-20 mA RH output. 1-3 days*
$149.75
RHP-2M11 Sintered filter duct mount humidity/temperature transmitter with 2% sensor, 4 to 20 mA output for humidity and temperature. 1-3 days*
$170.50
RHP-2M22 Sintered filter duct mount humidity/temperature transmitter with 2% sensor, 0 to 10 V output for humidity and temperature. 1-3 days*
$170.50
RHP-2O10 OSA 2% RH transmitter with 4-20 mA RH output. 1-3 days*
$132.75
RHP-2O11 OSA 2% RH/temperature transmitter with 4-20 mA RH output and 4-20 mA temperature output. 1-3 days*
$153.50
RHP-3D2B Duct mount 3% RH/temperature transmitter with 0-10 VDC RH output and 10K @ 25°C thermistor temperature output. 1-3 days*
$157.75
RHP-3D1F Duct mount 3% RH/temperature transmitter with 4-20 mA RH output and 20K NTC thermistor temperature output. 1-2 Weeks*
$157.75
RHP-3D1A Duct mount 3% RH/temperature transmitter with 4-20 mA RH output and 10K @ 25°C thermistor temperature output. 1-3 days*
$157.75
RHP-3D2D Duct mount 3% RH/temperature transmitter with 0-10 VDC RH output and 100 Ohm RTD DIN 385 temperature output. 1-2 Weeks*
$158.65
RHP-3D2E Duct mount 3% RH/temperature transmitter with 0-10 VDC RH output and 1K Ohm RTD DIN 385 temperature output. 1-2 Weeks*
$158.65
RHP-3D20 Duct mount 3% RH transmitter with 0-10 VDC RH output. 1-3 days*
$142.25
RHP-3D2F Duct mount 3% RH/temperature transmitter with 0-10 VDC RH output and 20K NTC thermistor temperature output. 1-3 days*
$157.75
RHP-2O1A OSA mount 2% RH/temperature transmitter with 4-20 mA RH output and 10K type III NTC thermistor temperature output. Less Than 1 Week*
$148.25
RHP-3D22 Duct mount 3% RH/temperature transmitter with 0-10 VDC RH output and 0-10 VDC temperature output. 1-3 days*
$163.00
RHP-3D3E Duct humidity/temperature transmitter with 3% sensor, 0 to 5 V humidity output, Pt1000 RTD temperature output. 1-2 Weeks*
$158.65
RHP-3M10 Sintered filter duct mount humidity transmitter with 3% sensor, 4 to 20 mA humidity output. 1-2 Weeks*
$142.25
RHP-3D1B Duct mount 3% RH/temperature transmitter with 4-20 mA RH output and 10K @ 25°C thermistor temperature output. 1-3 days*
$157.75
RHP-3M11 Sintered filter duct mount humidity/temperature transmitter with 3% sensor, 4 to 20mA humidity/temperature output. 1-3 days*
$163.00
RHP-3D22-LCD Duct mount 3% RH/temperature transmitter, 0-10 VDC RH output and 0-10 VDC temperature output, with LCD. 1-2 Weeks*
$225.00
RHP-2O20 OSA 2% RH transmitter with 0-10 VDC RH output. Less Than 1 Week*
$132.75
RHP-3M1A Sintered filter duct mount humidity/temperature transmitter with 3% sensor, 4 to 20 mA humidity output, 10K Type III NTC thermistor temperature output. 1-2 Weeks*
$157.75
RHP-3M1B Sintered filter duct mount humidity/temperature transmitter with 3% sensor, 4 to 20 mA humidity output, 10K type II NTC thermistor temperature output. 1-2 Weeks*
$157.75
RHP-2O1B OSA mount 2% RH/temperature transmitter with 4-20 mA RH output and 10K type II NTC thermistor temperature output. 1-3 days*
$148.25
RHP-3D1D Duct mount 3% RH/temperature transmitter with 4-20 mA RH output and 100 Ohm RTD DIN 385 temperature output. 1-2 Weeks*
$158.65
RHP-3M20 Sintered filter duct mount humidity transmitter with 3% sensor, 0 to 10 VDC humidity output. 1-3 days*
$142.25
RHP-2O22 OSA mount 2% RH/temperature transmitter with 0-10 VDC RH output and 0-10 VDC temperature output. 1-3 days*
$153.50
RHP-3M22 Sintered filter duct mount humidity/temperature transmitter with 3% sensor, 0 to 10 VDC humidity/temperature output. 1-3 days*
$163.00
RHP-3D1E Duct mount 3% RH/temperature transmitter with 4-20 mA RH output and 1K Ohm RTD DIN 385 temperature output. 1-2 Weeks*
$158.65
RHP-3O10 OSA 3% RH transmitter with 4-20 mA RH output. 1-3 days*
$125.25
RHP-3O11 OSA 3% RH/temperature transmitter with 4-20 mA RH output and 4-20 mA temperature output. 1-3 days*
$146.00
RHP-2O1D OSA mount 2% RH/temperature transmitter with 4-20 mA RH output and Pt100 RTD temperature output. 1-3 days*
$149.15
RHP-3O1A OSA mount 3% RH/temperature transmitter with 4-20 mA RH output and 10K type III NTC thermistor temperature output. 1-3 days*
$140.75
RHP-2O2A OSA mount 2% RH/temperature transmitter with 0-10 VDC RH output and 10K type III NTC thermistor temperature output. 1-3 days*
$148.25
RHP-2O1E OSA mount 2% RH/temperature transmitter with 4-20 mA RH output and Pt1000 RTD temperature output. 1-3 days*
$149.15
RHP-3O1B OSA mount 3% RH/temperature transmitter with 4-20 mA RH output and 10K type II NTC thermistor temperature output. 1-3 days*
$140.75
RHP-2O2B OSA mount 2% RH/temperature transmitter with 0-10 VDC RH output and 10K type II NTC thermistor temperature output. 1-3 days*
$148.25
RHP-3O1D OSA mount 3% RH/temperature transmitter with 4-20 mA RH output and Pt100 RTD temperature output. Less Than 1 Week*
$141.65
RHP-3O1E OSA mount 3% RH/temperature transmitter with 4-20 mA RH output and Pt1000 RTD temperature output. Less Than 1 Week*
$141.65
RHP-2O1F OSA mount 2% RH/temperature transmitter with 4-20 mA RH output and 20K NTC thermistor temperature output. Less Than 1 Week*
$148.25
RHP-3O1F OSA mount 3% RH/temperature transmitter with 4-20 mA RH output and 20K NTC thermistor temperature output. Less Than 1 Week*
$140.75
RHP-2O2D OSA mount 2% RH/temperature transmitter with 0-10 VDC RH output and Pt100 RTD temperature output. Less Than 1 Week*
$149.15
RHP-2O2E OSA mount 2% RH/temperature transmitter with 0-10 VDC RH output and Pt1000 RTD temperature output. Less Than 1 Week*
$149.15
RHP-3O20 OSA 3% RH transmitter with 0-10 VDC RH output. Less Than 1 Week*
$125.25
RHP-2O2F OSA mount 2% RH/temperature transmitter with 0-10 VDC RH output and 20K NTC thermistor temperature output. Less Than 1 Week*
$148.25
RHP-3O22 OSA mount 3% RH/temperature transmitter with 0-10 VDC RH output and 0-10 VDC temperature output. 1-3 days*
$146.00
RHP-2R11 OSA humidity/temperature transmitter with 2% sensor, 4 to 20 mA humidity/temperature output with radiation shield. 1-3 days*
$223.50
RHP-3O2A OSA mount 3% RH/temperature transmitter with 0-10 VDC RH output and 10K type III NTC thermistor temperature output. 1-3 days*
$140.75
RHP-3O2B OSA mount 3% RH/temperature transmitter with 0-10 VDC RH output and 10K type II NTC thermistor temperature output. 1-3 days*
$140.75
RHP-2R1B OSA humidity/temperature transmitter with 2% sensor, 4 to 20 mA humidity output, 10K type II thermistor temperature output with radiation shield. 1-3 days*
$218.25
RHP-2S11 Sintered filter OSA humidity/temperature transmitter with 2% sensor, 4 to 20 mA humidity/temperature output. 1-3 days*
$160.50
RHP-3O2E OSA mount 3% RH/temperature transmitter with 0-10 VDC RH output and Pt1000 RTD temperature output. Less Than 1 Week*
$141.65
RHP-2S1B Sintered filter OSA humidity/temperature transmitter with 2% sensor, 4 to 20 mA humidity output, 10K type II NTC thermistor temperature output. 1-3 days*
$155.25
RHP-3O2F OSA mount 3% RH/temperature transmitter with 0-10 VDC RH output and 20K NTC thermistor temperature output. 1-3 days*
$140.75
RHP-3R11 OSA humidity/temperature transmitter with 3% sensor, 4 to 20 mA humidity/temperature output with radiation shield. 1-3 days*
$216.00
RHP-3D10 Duct mount 3% RH transmitter with 4-20 mA RH output. 1-2 Weeks*
$142.25
RHP-3S11 Sintered filter OSA humidity/temperature transmitter with 3% sensor, 4 to 20 mA humidity/temperature output. 1-3 days*
$153.00
RHP-3D11 Duct mount 3% RH/temperature transmitter with 4-20 mA RH output and 4-20 mA temperature output. 1-3 days*
$163.00
RHP-3D11-LCD Duct mount 3% RH/temperature transmitter, 4-20 mA RH output and 4-20 mA temperature output, with LCD. 1-2 Weeks*
$225.00
RHP-3S1A Sintered filter OSA humidity/temperature transmitter with 3% sensor, 4 to 20 mA humidity output, 10K type III NTC thermistor temperature output. Less Than 1 Week*
$147.75
RHP-3S1B Sintered filter OSA humidity/temperature transmitter with 3% sensor, 4 to 20 mA humidity output, 10K type II NTC thermistor temperature output. 1-3 days*
$147.75
RHP-3S22 Sintered filter OSA humidity/temperature transmitter with 3% sensor, 0 to 10 VDC humidity/temperature output. 1-3 days*
$153.00
RHP-3S2A Sintered filter OSA humidity/temperature transmitter with 3% sensor, 0 to 10 VDC humidity output, 10K type III NTC thermistor temperature output. 1-3 days*
$147.75
RHP-3S2B Sintered filter OSA humidity/temperature transmitter with 3% sensor, 0 to 10 VDC humidity output, 10K type II NTC thermistor temperature output. 1-3 days*
$147.75

Specifications

Relative Humidity Range:
0 to 100% RH.
Temperature Range:
-40 to 140°F (-40 to 60°C).
Accuracy, RH:
RHP-2XXX ±2% 10 to 90% RH @ 25°C;RHP-3XXX ±3% 20 to 80% RH @ 25°C;RHP-5XXX ±5% 20 to 80% RH @ 25°C.
Accuracy, Thermistor Temp Sensor:
±0.2°C @ 25°C (±0.36°F @ 77°F).
Accuracy, RTD Temp Sensor:
DIN Class B; ±0.3°C @ 0°C (±0.54°F @ 32°F).
Accuracy, Solid State Band Gap:
±0.9°F @ 77°F (±0.5°C @ 25°C).
Hysteresis:
±1%.
Repeatability:
±0.1% typical.
Temperature Limits:
-40 to 140°F (-40 to 60°C).
Storage Temperature:
-40 to 176°F (-40 to 80°C).
Compensated Temperature Range:
-4 to 140°F (-20 to 60°C).
Power Requirements:
4-20 mA loop powered models: 10-35 VDC; 0-5/10 V output models: 15-35 VDC or 15-29 VAC.
Output Signal (Model Dependent):
4-20 mA; 0-5/10V @ 5 mA max.
Response Time:
15 s.
Electrical Connections:
Removable screw terminal block.
Conduit Connection:
Duct Mount: 1/2" NPS; OSA: 1/2" (22.3 mm).
Drift:
<1% RH/year.
RH Sensor:
Capacitance polymer.
Temperature Sensor:
>Types 1, 2, 3: Solid state band gap;
Curves A,B,C; Thermistor;
Curves D,E; Platinum RTD DIN 385. (See R-T Lookup Table).
Enclosure Material:
Duct mount sensor tube: PVC-UL 94 V-0; Duct mount sensor cap: Polycarbonate ABS blend-greater than UL 94 V-0; Duct mount electronics housing and cover: Makrolon® polycarbonate-UL 94V-HB; OSA: Polycarbonate.
Enclosure Rating:
Duct mount: NEMA 4X (IP66) for housing only; OSA: NEMA 4X (IP66).
Display:
Duct Mount only, optional 2-line alpha numeric, 8 characters/line.
Display Resolution:
RH: 0.1%; 0.1°F (0.1°C).
Weight:
Duct Mount: .616 lb (.3 kg) OSA: 1 lb (.45 kg).
Agency Approvals:
CE.

Features

  • 2%, 3%, or 5% accuracy models
  • Optional LCD display on duct mount models
  • Radiation shield option for outdoor installation in direct sunlight

Product Literature

Manuals

Catalog Pages

Product Data Sheet

SlideShare

Model Chart

EXAMPLE RHP 2 D 1 A LCD RHP-2D1A-LCD RH/Passive Temperature Sensor Transmitter, 2% accuracy, duct mount with plastic tip, 4-20 mA RH output, 10K @ 25°C thermistor (Type III), with LCD display.
SERIES RHP           RH/Passive Temperature Sensor Transmitter
ACCURACY   2
3
5
        2% Accuracy
3% Accuracy
5% Accuracy
HOUSING TYPE     D
F
M
O
S
R
      Duct Mount w/ Plastic Hydrophobic Filter
Duct Mount w/Sintered Filter  (no longer available, use the D option)
Duct Mount w/ Plastic Hydrophobic Filter
OSA (Outside Air)
OSA w/Sintered Filter
OSA w/Sintered Filter and Radiation Shield
RH OUTPUT       1
2
3
    4-20 mA
0-10 Volts
0-5 Volts
TEMPERATURE SENSOR         0
1
2
3
A
B
C
D
E
F
  None
4-20 mA
0-10 Volts
0-5 Volts
10K @ 25°C Thermistor (Type III)
10K @ 25°C Thermistor (Type II)
3K @ 25°C Thermistor
100Ω RTD DIN 385
1KΩ RTD DIN 385
20KΩ @ 25°C Thermistor
OPTIONS           LCD
NIST
LCD Display
NIST Calibration

Questions

Question
What purpose does the sintered filter perform on the RHP transmitter and does its use preclude adding the LCD option? Is it recommended when transmitter is located just after blower but before cooling coil?
Answer
The sintered filter is recommended in applications where you expect to be close to the temperature limit of the RHP (near 140°F) because the sintered filter has higher temperature resistance than the standard fiber membrane filter. You can order the sintered filter version with or without an LCD screen.
Question
I'm looking for a dual temp. and humidity gauge for an 8" duct. I'm wanting to remote read the temp and humidity on the incoming and outgoing air to an ERV unit. The RHP-3M11-LCD was recommended to me, however, it is a direct read. What would be the correct instrument to remote read the temperature and humidity from a distance of 8 feet. The 8" duct is in the attic and I want to read the result in the down-stair hall. I don't want to record nor program the unit, just read the performance.
Answer
The sensor recommended would be the best option we have for sensing temperature and relative humidity for your application. We do not have any options with a remote display that could stretch as far as you are asking, nor are there any on the market to my knowledge. In every case, you would need to utilize a process output, in this case 4-20 mA, to transmit the readings to a remote display(s) which would accept the process signal(s). If you are just looking for a remote readout to go with the RHP sensor with no control functionality, then you could look at one of our panel meters, possibly the SPPM, DPMA, DPMW, or DPMP & DPML series panel meters. For assistance selecting an appropriate panel meter, please contact our technical support group at 219-879-8000.
Question
On the RHP series temp/humidity sensors, is it possible to get a model with a 0-10 V dew-point output and a 0-10 V temperature output? I need dew point output, and would prefer the temperature output to be configured as 0-10 V rather than one of the other formats. I can custom configure a model RHP-3W44, but I wasn't 100% sure that that model would be able to put out a dew point signal. Will it in fact do that?
Answer
I would recommend getting an RHP-3W22 instead of the RHP-3W44. This will give you just the 0-10V outputs instead of a combination 0-10V and 4-20 mA.
Question
P/N: RHP-2W44-LCD Documentation (https://dwyer-inst.com/PDF_files/AQ_RHP_E_N.pdf) on p. 4 indicates that sensor can be replaced, but unable to identify P/N of replacement sensor and if to be source from Dwyer or others
Answer
The replacement sensors are no longer available. RHP-2W44-LCD is now an obsolete unit that has been replaced with the RHP-2N44-LCD series. The sensors in this unit are not field replaceable.
Question
I purchased two of your RHP-2D11-LCD sensors. I am in need of the calibration values so I can convert the analog input values to the desired outputs (RH and temp). We have the sensors connected to an IoT system recording the analog data inputs to a portal.
Answer
0 to 100% RH. = 4-20 mA on the humidity side -40 to 140°F (-40 to 60°C). = 4-20 mA on the temp side.
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Model Description Availability* Price
RHRS 6 plate solar radiation shield for sintered filter version RH transmitters. 1-3 days*
$50.50
A-RHP-FC Replacement plastic hydrophobic filter. 1-3 days*
$8.20
A-RHP-RT Retrofit tool for fitting O-ring on RHP-D/M models for new filter A-RHP-FC 1-2 Weeks*
$31.50