250mm Duct-Mounted Temperature and Humidity Sensor 4 to 20 mA output
The RHT-DM transmitters feature highly precise and stable sensors for measuring relative humidity and temperature. These measurements are converted into 4 to 20 mA output signals, which are linearly proportional to the readings.
The RHT-DM transmitters feature highly precise and stable sensors for measuring relative humidity and temperature. These measurements are converted into 4 to 20 mA output signals, which are linearly proportional to the readings.
As microprocessor-based devices, they can be configured using the TxConfig-USB communication interface, along with the SigNow app or software, which is available for both Android and Windows. The outputs can be customized to transmit temperature, relative humidity, or dew point data. The RHT-WM model is designed for wall mounting, while the RHT-DM model includes an extended sensor probe for installation in ducts or through walls.
Taking Care with Sensors
The RHT-WM is primarily designed for commercial offices and buildings where the air is relatively clean and condensation is not a concern. The calibration of the humidity sensor may be altered if it is exposed to contaminant vapors or extreme humidity and temperature conditions over extended periods. For use in dusty environments, it is recommended to use a Sintered Bronze Dust Cover (SKU RHT-030).
Power supply: 12 Vdc to 30 Vdc
Output current: 4-20 mA or 20-4 mA current, 2-wire type – loop powered.
Channel isolation: The 4 to 20 mA outputs are isolated from each other
Reverse polarity protection: Yes
Cable entrance: compress fitting PG7 gland.
Protection Index:
- Electronic module housing: IP65.
- Sensor housing: IP40.
Operating limits:
- Operating Temperature (RHT-DM): -20 to 70 °C (-4 to 158 °F), 0 to 95 % RH..
- Storage Temperature: -20 to 80 °C (-4 to 176 °F)
RH channel:
- Measurement range: Configurable between 0 and 100 % RH or -100 and 103 °C (-148 and 217.4 °F) at Dew Point.
- Response Time (1/e (63 %)): 8 seconds @ 25 °C (with air moving at 1 m/s).
Temperature channel:
- Response Time (1/e (63 %)): Up to 30 s (with air moving at 1 m/s).
- Measurement range: Configurable between -40 and 120 °C (-40 and 248 °F).
Dimensions: 
Dispatch
In-stock orders are dispatched within 2 business days.
Shipping options
We deliver across Australia and internationally by any of the following methods:
- Australia Post Express
- Australia Post Parcel Post
- DHL
- FedEx (only international)
- Freight account. We'll email packaging dimensions when the shipment is ready to be book.
*Transit times vary depending on the shipping method and destination.
Store Pickup - Carrum Downs, Victoria, 3201
Order before 11am to collect after 2pm the same day. Mon–Fri, 9am–5pm, excludes public holidays.
RETURNS
How to return an item Contact us before sending anything back. Email info@oceancontrols.com.au or call +61 3 9708 2390. We'll confirm eligibility and guide you to the return process.
Return window 14 days from dispatch date.
Condition required Items must be unused and in original packaging, including all documentation and manuals.
Restocking fee A 20% restocking fee applies to all accepted returns. Return shipping costs are the customer's responsibility.
Non-returnable items
- Custom-made or specially imported products
- Software licences (some software have trial versions available)
- Items not in original, as-new condition
WARRANTY
How to make a warranty claim Before returning anything, please contact us. Our engineers can often resolve the issue remotely. If a return is required, our team will provide you with a warranty form to include with the goods.
What's covered Defects in materials and workmanship under normal use and correct installation.
What's not covered The warranty does not cover damage or failures caused by factors outside our control, including incorrect installation, unauthorised alterations or modifications, or any installation or use not recommended by the manufacturer.
Standard warranty All products carry a 12-month warranty from the date of purchase unless stated otherwise.
Extended warranty
- Labjack: 5 Years
- Atop: 5 Years
- MeanWell: 3 Years
- Teracom: 3 Years
- Novus: 3 Years
