Humidity Transmitter

Product Details:

The Series RHP-W Wall Mount Humidity/Temperature/Dew Point Transmitter is the most versatile room transmitter on the market. The stylish housing is well vented to provide air flow across the sensor to improve measurement accuracy. An optional LCD display can be integral to the transmitter or a remote display can be ordered for building balancing or LEED® validation. The LCD display indicates the ambient temperature along with the humidity or dew point. The transmitter has internal dip switches to select the temperature engineering units and whether the transmitter outputs humidity or dew point.

The humidity and temperature sensors are field replaceable to reduce service cost and inventory. The humidity and the dew point are measured using a capacitive polymer sensor that completely recovers from 100% saturation. The humidity and dew point can have either a current or voltage output, while the optional temperature output can be a current, voltage, RTD or thermistor. For models with current or voltage for the temperature output, the temperature range is field selectable.

Specification:

• Temperature Range : -40 to 140°F (-40 to 60°C) for thermistor and RTD sensors. -20 to 140°F (-28.9 to 60°C) for solid state band gap temperature sensors.
• Dew Point Temperature Range : -20 to 140°F (-28.9 to 60°C); 0 to 100°F (-17.8 to 37.8°C); 40 to 90°F (4.4 to 32.3°C); -4 to 140°F (-20 to 60°C) field selectable ranges.
• Accuracy :  >RH: Model RHP-2XXX ±2% 10-90% RH @ 25°C, Model RHP-3XXX ±3% 20-80% RH @ 25°C, Thermistor temperature sensor: ±0.36°F @ 77°F (±0.2°C @ 25°C), RTD Temperature sensor: DIN Class B; ±0.54°F @ 32°F (±0.3°C @ 0°C), Solid state band gap temperature sensor: ±0.9°F @ 77°F (±0.3°C @ 25°C).
• Temperature Limits : Operating: -40 to 140°F (-40 to 60°C); Storage: -40 to 176°F (-40 to 80°C).
• 4-20 mA Loop Powered Output: >Power Requirements: 10-35 VDC. Output Signal: 4-20 mA, 2 channels for humidity/solid state temperature sensor models (loop powered on RH). Switch selectable RH/dew point. Switch selectable normal or reverse output.
• 0-5/10V Outputs: >Power Requirements: 15-35 VDC or 15-29 VAC. Output Load: 5 mA max., 2 channels for humidity/solid state temperature sensor models. Switch selectable 0-10V/2-10V or 0-5V/1-5V output. Switch selectable RH/dew point. Switch selectable normal or reverse output.
• Solid State Band Gap Temp Sensor Output Ranges : Switch selectable, -20 to 140°F (-28.9 to 60°C); 0 to 100°F (-17.8 to 37.8°C); 40 to 90°F (4.4 to 32.3°C); -4 to 140°F (-20 to 60°C).
• Electrical Connections: Screw terminal block.
• Drift : <1% RH/year.
• RH Sensor : Capacitance polymer.
• Enclosure Material : Warm gray polycarbonate.
• Display : Optional LCD, backlit on 0-5/10V models. Switch selectable %RH or dew point, °F/°C.
• Display Resolution : RH: 1%; Temperature: 0.1°F (0.1°C); Dew Point: 1°F (1°C).

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• Item Code: Series-RHP-W

Product Details:

The SERIES RH-R Humidity Transmitter is the ideal transmitter for those applications where space is limited. The compact sensor is protected by a removable filter. It can be mounted up to 16 feet away from the weatherproof base. The Series RH-R is ideal for environmental chambers, rubber bladder burst detection and air handler applications.

Features:

• Remote housing allows for flexibility sensing where space may be limited

 

Applications:

• Process system monitoring
• Environmental chambers
• Air economizers

Installation:
Make sure all connections are in accordance with the job wiring diagram and in accordance with national and local electrical codes. Use copper conductors only.Do not make changes to the cable lengths. Sensors are factory calibrated for supplied length of cable. Optional lengths are available from the factory.

Caution:
Use electrostatic discharge precautions (e.g., use of wrist straps) during installation and wiring to prevent equipment damage.
Avoid locations where severe shock or vibration, excessive moisture or corrosive fumes are present. NEMA Type 4X (IP65) housings are intended for outdoor use primarily to provide a degree of protection against wind-blown dust, rain, and hose directed water.
Do not exceed ratings of this device, permanent damage not covered by warranty may result. The 4 to 20 mA models are not designed for AC voltage operation.

OSA (Outside Air):

• The transmitter should be mounted under an eave, shield, or in an area that is out of
• the elements or direct sunlight.
• Remove the cover plugs from the face of the unit and the top cover.
• Position the transmitter where it is to be mounted and mark the mounting holes in each corner of the housing.
• Drill or punch out marked locations.
• Place the transmitter box over mounting holes on wall and align. Install wall mount screws (not provided) in mounting holes.
• Proceed with wiring according to Figure 2.
• Replace cover and cover plugs on the face of the unit.

Maintenance:
Upon final installation of the Series RH-R Temperature/Humidity Transmitter and the companion receiver, no routine maintenance is required. A periodic check of the system calibration is recommended. The Series RH-R is not field serviceable and should be returned if repair is needed (field repair should not be attempted and may void warranty). Be sure to include a brief description of the problem plus any relevant application notes. Contact customer service to receive a return goods authorization
number before shipping.

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• Item Code: Series-RH-R

Product Details:

The compact SERIES WHT Humidity/Temperature Transmitter is designed to withstand the elements. A removable sintered filter protects the polymer capacitance sensor from solid objects that may come in contact with the transmitter. The transmitter is available with 4 to 20 mA or 0 to 10 VDC output signals for both temperature and humidity. This transmitter is ideal for measuring outside air temperature and humidity levels for air handling economizer applications.

Features:

• RH or RH and temperature outputs
• Compact NEMA 3S construction

 

Specification:

• Accuracy, RH : ±3% 20 to 80% RH, ±4% @ 10 to 20%, 80 to 90%.
• Accuracy, Temp Models with 4 to 20 mA Temp. Output : ±0.9°F @ 72°F (±0.3°C @ 25°C).
• Accuracy, Temp Models with Passive Thermistor Temp Sensor : ±0.4°F @ 77°F (±0.22°C @ 25°C).
• Compensated Temperature Range, RH : -4 to 140°F (-20 to 60°C).
• 4-20 mA Loop Powered Models : Power Requirements: 10 to 35 VDC; Output Signal: 4 to 20 mA.
• 0 to 10 V Output Models : Power Requirements: 15 to 35 VDC or 15 to 29 VAC; Output Signal: 0 to 10 V @ 5 mA max.
• 0 to 5 V Output Models : Power Requirements: 10 to 35 VDC or 10 to 29 VAC; Output Signal: 0 to 5 V @ 5 mA max.
• Electrical Connections : Removable screw terminal block.
• Drift : <1% RH/year.
• RH Sensor : Capacitance polymer.
• Temperature Sensor: 4 to 20 mA output, solid state band gap. Passive output: 10K @ 25°C thermistor (Dwyer curve A).

Installation:
Caution:
Use electrostatic discharge precautions during installation and wiring to prevent equipment damage.
Avoid locations where severe shock or vibration, excessive moisture or corrosive fumes are present. NEMA Type 3S (IP54) housings are intended for outdoor use primarily to provide a degree of protection against wind-blown dust, and rain. The 4-20 mA models are not designed for AC voltage operation.

Mounting:
The transmitter should be mounted with the sensor pointing downward to prevent water collection in the housing. The integral mounting tab has two sets of mounting holes. The larger holes are for the suspension mounting and the smaller holes are for surface mounting the transmitter to a wall. Please see Figure 1 and 2 for more information on both mounting method

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• Item Code: Series-WHT

Product Details:

The SERIES 657 Transmitters provide two 4 to 20 mA channels to produce separate output signals for both relative humidity and temperature. These devices deliver ±2% accuracy for humidity and ±1°F for temperature measurements. Stainless steel probe can be easily mounted to most ductwork using either of the two optional kits below.

Features:

• Polymer film humidity and thin film RTD temperature sensors offer highly reliable and stable measurements
• Remote mount housing offers installation flexibility (657-1)
• Rugged die-cast aluminum housing is great for industrial applications (657C-1)

 

Specification:

• Service : Dry clean air.
• Range : Relative Humidity: 0-100%; Temperature: 32 to 212°F (0 to 100°C).
• Accuracy : Relative Humidity: ±2% (10-90% RH), ±3% (0-10% and 90-100% RH); Temperature: ±1°F (0.5°C).

 

Applications:

• Cleanroom monitoring
• HVAC/building control monitoring

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• Item Code: Model-657-1

Product Details:

The SERIES HHT Hazardous Area Humidity/Temperature Transmitter takes accurate measurements in the harshest of environments. The explosion-proof model is offered with 4 to 20 mA output for humidity only. The intrinsically safe version is offered with 4 to 20 mA output for humidity and temperature, and do require an intrinsically safe barrier to meet hazardous area approvals. It is important to develop a routine schedule for replacing the RH/temperature sensor (part number A-451). The sensor should be replaced annually or sooner depending on application conditions.

Features:

• FM approved explosion-proof and intrinsically safe models
• Integral LCD option
• Replaceable calibrated sensor for long term use in harsh environments
• Dual temperature and relative humidity output models

Specification:

• Service : Dry clean air.
• Accuracy : ±2% 10 to 90% RH, ±0.9°F at 72°F (±0.3°C at 25°C).
• Power Requirements : For instrinsically safe models HHT-IX, 9.5 to 28 VDC. For explosion-proof models HHT-EX, 16.5 to 28 VDC.
• Output Signal : 4 to 20 mA, 2 channels for humidity/temperature models (loop power on RH).
• Electrical Connections : Screw terminal block.
• Drift : <1% RH/year.
• RH Sensor : Capacitance polymer.
• Temperature Sensor : Solid state band gap.
• Housing Material : Aluminum.
• Display : Optional 2 line alpha numeric, 8 characters/line. Temperature display is °F/°C selectable.
• Display Resolution : RH: 0.1%; Temperature: 0.1°F (0.1°C).
• Enclosure Rating : NEMA 4X (IP66). Models HHT-EX: FM Explosion-proof, Class I Div. 1 Group B, C, D, Class II Div. 1 Group E, F, G, Class III Div. 1; Models HHT-IX: FM Instrinsically Safe, Class I Div. 1 Group A, B, C, D, Class II Div. 1 Group E, F, G, Class III Div. 1 T4.

Applications:

• Process monitoring
• Offshore HVAC monitoring
• Dust and grain handling

 

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• Item Code: Series-HHT

Product Details:

The SERIES CDWP Carbon Dioxide Transmitters accurately monitor the CO2 concentration in industrial, agricultural, and indoor environments to help achieve energy savings. The IP54 die cast aluminum housing was designed for harsh environments making it ideal for animal husbandry and HVAC mechanical rooms. For increased sensor life and accuracy, a single-beam dual-wavelength non-dispersive infrared (NDIR) sensor is used to eliminate light source aging affects. This sensing technology provides the highest level of accuracy compared to Automatic Baseline Correction methods, which can unintentionally shift the calibration based on CO2 levels and barometric pressure conditions.

Features:

• IP54 aluminum housing
• Gray finish designed to withstand 168 hour salt spray test
• Single-beam dual-wavelength sensor automatically corrects for aging effects
• Measures unfiltered light intensity directly and eliminated error from incorrect assumptions of gas concentration in theoretical logic assumption methods
• Universal outputs to work with any building management

Specification:

• Sensor : Single beam, dual-wavelength NDIR.
• Power Consumption : Average: 2 w; Peak: 3.75 w.
• Output : Current: 4 to 20 mA (max. 500 Ω); Voltage: 0 to 5 VDC or 0 to 10 VDC (min. 500 Ω).
• Mounting Orientation : Vertically, with electrical connections points downward.

Applications:

• Animal Husbandry
• Mechanical Room
• CO2 Refrigeration Monitoring
• Greenhouses

 

Power Supply:
Choose a power supply with a voltage and current rating sufficient to meet the power specifications under all operating conditions. If the power supply is unregulated, make sure the output voltage remains within the required voltage range under all power line conditions

Maintenance/Repair:
Upon final installation of the Series CDWP, no routine maintenance is required. The Series CDWP is not field serviceable and it is not possible to repair the unit. Field repair should not be attempted and may void warranty.

Warranty/Return:
Refer to “Terms and Conditions of Sale” in our catalog and on our website. Contact customer service to receive a Return Goods Authorization number before shipping the product back for repair. Be sure to include a brief description of the problem plus any additional application notes.

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• Item Code: Series-CDWP

Product Details:

The SERIES HS Humidity Switch provides control for humidifying or dehumidifying systems. Relative humidity, output status, and error messaging can be viewed on the bright green LED. Access to programming parameters can be locked for security purposes using the password protection feature.

Features:

• Relative humidity display and control
• Parameter protection

Applications:

• Industrial Chillers
• Environmental Chambers
• Walk-ins and Freezers
• Heat Sealers
• Mug Frosters
• Coolers
• Display Cases and Cabinets
• Meat and Produce Storage
• Floral Preservation
• Refrigerated Transportation
• Laboratories
• Food Service Equipment
• Ovens and Dryers
• Greenhouses
• Museums
• Monitor Humidity in Ducts

Installation:

• Cut hole in panel 2.80 x 1.14 inches (71 x 29 mm).
• Apply silicone (or rubber gasket) around the perimeter of the hole to prevent leakage.
• Insert unit into hole of panel.
• Slide removable fitting clips onto unit from the back until secure to panel.
• Remove back cover to wire unit.
• Wiring diagram is displayed on the top of the unit

Maintenance/Repair:
Upon final installation of the Series HS Humidity Switch, no routine maintenance is required. A periodic check of system calibration is recommended. The devices are not field repairable and should be returned to the factory if recalibration or other services is required. After fir obtaining a Returned Goods Authorization (RGA) number, end the material, freight prepaid, to the following address. Please include a clear description of the problem plus any application information available.

 

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• Item Code: Series-HS

Product Details:

The SERIES THC simultaneously measures and controls temperature and humidity. The unit offers a 3-digit red display for temperature indication and a 3-digit green display indicating humidity. The Series THC is equipped with four independent relays, two for temperature control and two relays for humidity control. The THC Temperature/Humidity Switch accepts up to two temperature probe inputs (sold separately) and a humidity sensor.

Features:

• Temperature and humidity control in one device
• Password protected parameter settings
• Selectable fail safe status of relay outputs

Specification:

• Measurement Range : Temperature: -58 to 302°F (-50 to 150°C); Humidity: 10 to 100% RH.
• Input : Up to 2 thermistors and 1 humidity sensor.
• Output : 4 SPST, 8 A relays @ 250 VAC.
• Control Type : On/Off direction, direct or reverse acting, neutral.
• Accuracy : Temperature: ±0.5% of probe range; Humidity: ±3% (20 to 90%) of range.

Applications:

• Isolation chambers
• Environmental chambers
• Greenhouses

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• Item Code: Series-THC

Product Details:

The SERIES DW-USB Compact USB Data Logger allows users to monitor temperature, humidity, dew point, voltage, current, or carbon monoxide almost anywhere, and then download stored data by simply plugging the module directly into a PC’s USB port. The compact housing can resist moisture up to IP67 when the protective cap is attached, and has built in LED’s to indicate an alarm has been met or the battery is low. Using the included Windows® based software, users can set the sampling rate, start time, high/low alarms, and temperature unit.

Specification:

• Range:DW-USB-2-LCD: Temperature: -31 to 176° F (-35 to 80°C), Humidity: 0 to 100% RH; DW-USB-2-HA-LCD: Temperature: -31 to 176° F (-35 to 80°C), Humidity: 0 to 100% RH; DW-USB-6-LCD: K-type: -328 to 2372°F (-200 to 1300°C), J-type: -202 to 1652°F (-130 to 900°C), T-type: -328 to 662°F (-200 to 350°C).
• Accuracy:DW-USB-2-LCD: Temperature ±1°F (±0.5°C) Humidity ±3.0%; DW-USB-2-HA-LCD: Temperature ±0.6°F (±0.3°C), Humidity ±2.0%; DW-USB-6-LCD: ±2°F (±1°C).
• Memory Size : Thermocouple models: 32510 readings; Temperature/humidity models: 16382 readings.
• Sampling Mode : Continuous with data rollover.
• Sampling Rate : Selectable from 10 seconds to 12 hours for temperature/humidity models; 1 second to 12 hours for thermocouple models.
• Computer Requirements : Windows® 2000, Windows® XP, Windows® 7, Windows VISTA® 32-bit or 64-bit operating systems.
• Alarms : Programmable high/low.
• Weight : Temperature/humidity models 1.6 oz (45.4 g); Thermocouple models 1.8 oz (51 g).

Button Operation:
The button performs two functions:

• To start the logger when in push to start mode.
• To enable the display and cycle through the available display modes (see diagram below).

Battery Installation:
Before using the data logger, you will need to insert the 3.6 V 1/2 AA battery provided, following the instructions below.

• Use screwdriver to gently depress tab of the battery compartment.
• Pull battery cover towards you, away from the unit.
• Install the battery, taking note of polarities.
• Replace battery cover. Cover is secure when tab returns to original position

Maintenance:
Upon final installation of the Compact DW-USB-LCD Data Logger, no routine maintenance is required. Leaving the logger plugged into your computer for an extended period of time will considerably lower its battery life. A periodic check of system calibration is recommended. The Series DW-USB-LCD is not field serviceable and should be returned if repair is needed (field repair should not be attempted and may void warranty). Be sure to include a brief description of the problem plus any relevant application notes. Contact customer service to receive a return goods authorization number before shipping.

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• Item Code: Series-DW-USB-LCD

Product Details:

The Series BDL Button Data Logger records temperature and humidity in applications where size and cost effectiveness are vital. Housed in a compact stainless steel case, the BDL is durable in hostile environments, while also being able to be inserted in small items and packages. The Series BDL-K Logger Kit includes 2 buttons, 2 magnets, an interface cable, and a plastic button holder.

Features:

• Compact to fit in small areas and durable to work in hostile environments
• Self-powered unit gives no need for external power supply
• Magnetic mounting for quicker installation

Specification:

• Range : BLD-1: -40 to 185°F (-40 to 85°C); BDL-2: -4 to 185°F (-20 to 85°C); 0 to 100% RH.
• Memory Size : BDL-1: 2048 readings; BDL-2: 4096 temperature and 4096 humidity readings (low resolution), 2048 temperature and 2048 humidity readings (high resolution).
• Accuracy : BDL-1: ±1.5°F (±1°C) from -22 to 158°F (-30 to 70°C); BDL-2: ±0.9°F (±0.5°C) from 14 to 158°F (-10 to 70°C), ±5% RH.
• Sampling Method : Stop on memory full or continuous recording.
• Sampling Rate : BDL-1: Selectable from 1 to 255 m.; BDL-2: Selectable from 1 s. to 24 hrs.
• Computer Requirements : Windows® 98, Windows® 2000, Windows® ME, Windows NT®, Windows® XP, and Windows Vista® operating system with 16 MB RAM, one free USB port.
• Alarms : Programmable high/low.

Applications:

• Food processing verification
• Pharmaceutical storage
• Transportation of temperature sensitive goods
• HVAC system testing and balancing

Software Installation:

• Ensure that no applications are running.
• Insert the installation CD and select the install option from the menu.
• Follow the onscreen instructions. 
• Restart the computer. A new icon will be placed on the desktop.
• After installing the software, connect the logger.
• The first time you open the software, you will be prompted to enter a password. The password will only be used if you decide to use the security functions. Enter and take note of the password.

Software Features:

• Graphing of downloaded data
• Zooming function
• Temperature in °F or °C
• Up to two traces per graph
• Multiple traces per graph (Full Version Only)
• Exporting to spreadsheet (Full Version Only)
• Viewing the data table (Full Version Only)
• Calculating Mean Kinetic Temperature (MKT) (Full Version Only)
• Emailing graphs (Full Version Only)

Maintenance:

• Upon final installation of the Series BDL Button Data Logger, no routine maintenance is required.
• Fast logging will considerably shorten the battery life. To preserve battery life, it is recommended to use the longest practical sampling rate, and when the logger is not in use, to set the sampling rate to the longest option.
• A periodic check of system calibration is recommended. The Series BDL is not field serviceable and should be returned if repair is needed (field repair should not be attempted and may void warranty). Be sure to include a brief description of the problem plus any relevant application notes. Contact customer service to receive a return goods authorization number before shipping.

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• Item Code: Series-BDL

Product Details:

The Model GDL Graphical Display Data Logger can record and instantly display temperature, humidity, and dew point trends in a text or graphic format. The GDL has internal temperature and humidity sensors. With the included Windows® based software, the user can select the sampling interval, high/low alarms, logging channels, and recording start time. Over 40,000 data points can be recorded and the measured data stays secure with a recording session counter and password-protected calibration.

Features:

• Measurements displayed in text or graph
• Able to record over 40,000 data points and download them to a PC
• Includes logging summary with details of the sample rate and memory status

Specification:

• Sampling Method : Stop on memory full or continuous recording.
• Sampling Rate : Second to 18 hours, 1 second increments.
• Computer Requirements : Windows® 98 and above (software included).
• Power Requirements : (3) AA alkaline batteries, installed functional, user replaceable.
• Alarms : Programmable high/low.
• Interface : USB port (cable included).

Applications:

• Greenhouses/florists
• Medical storage facilities
• Refrigeration systems

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• Item Code: Model-GDL

Product Details:

The SERIES RHRS Radiation Shield protects outside air humidity transmitters from rain and radiated heat. With the curved shape and color of the plates, air flow is able to move across the sensor to keep radiated temperatures from rooftops and surrounding surfaces from affecting humidity readings. For ease of installation, the Series RHRS has integral pipe mounting hardware which can be removed for surface mounting applications. The brackets on the Series RHRS are specifically designed to be installed on the Dwyer Series RHP outside air humidity transmitters with sintered filters.

Features:

• Adjustable sensor mounting collar works with Dwyer RHP sintered filter outdoor air humidity transmitters or other RH devices

Installation:

• Loosen plastic probe retainer on radiation shield by unscrewing two retainer screws.
• Slide humidity transmitter probe completely into radiation shield.
• Screw plastic probe retainer to the radiation shield until the probe is firmly held in place. Do not over tighten the screws.

For Pipe Mounting:

• Remove the u-bolt from the mounting bracket.

For Surface Mounting:

• Remove the u-bolt and the screw holding the pipe retaining bracket.
• Mark the outer two holes of the mounting bracket on the surface.
• Drill the two holes marked in the previous step into the surface.
• Attach the radiation shield to the surface.

Applications:

• Building outside air reference
• Weather stations

 

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• Item Code: Series-RHRS