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Call 0345 2300 599The WaveNode WN-2.QRP is a low-power HF RF sensor for use with compatible WaveNode monitoring systems and the Sierra Radio Systems SIR-335 Two Port RF Watt Meter Control Module.
Covering 3.5-60MHz with a power range of 0-60W, this sensor is ideal for QRP and lower-power HF stations where forward power, reflected power, and SWR monitoring are required. It is a sensible choice for portable, low-power, and modest fixed-station installations where the higher-power WN-2.HF sensor is not required.
The WN-2.QRP is fitted with 2 x PL female connectors, making it suitable for installation in-line with standard HF station coaxial cabling using PL-259 terminated leads.
Key Features
- QRP / low-power HF RF sensor
- Suitable for use with the Sierra Radio Systems SIR-335 watt meter control module
- Covers 3.5-60MHz
- Power range of 0-60W
- 50 ohm impedance
- 2 x PL female connectors
- Suitable for HF and 6m low-power station monitoring
- Allows forward power, reflected power, and SWR monitoring when used with compatible control hardware
- Good choice for QRP, portable, and lower-power HF installations
- Passive RF sensor with no separate power supply required
Typical Uses
- QRP HF station power monitoring
- Low-power HF and 6m monitoring
- Portable station RF monitoring
- Use with the Sierra SIR-335 watt meter control module
- Monitoring low-power transmitter output
- Monitoring antenna system performance
- Forward and reflected power measurement
- SWR monitoring in station automation systems
- Remote low-power station monitoring where suitable
System Notes
The WN-2.QRP is an RF sensor and must be connected to compatible monitoring hardware to display or process power readings.
When used with the SIR-335 Two Port RF Watt Meter Control Module, the sensor provides the RF measurement point while the SIR-335 integrates the readings into the Sierra Station Controller system.
For higher-power HF installations, consider the WN-2.HF sensor instead. For VHF/UHF installations, consider the WN-2.UHF sensor.
Specifications
| Specification | Details |
|---|---|
| Brand | WaveNode |
| Model | WN-2.QRP |
| Product type | QRP RF power sensor |
| Sensor type | LP-1 style low-power HF sensor |
| Frequency range | 3.5-60MHz |
| Power range | 0-60W |
| Impedance | 50 ohms |
| Connector type | 2 x PL female |
| Weight | Approx. 205g |
| Power requirement | No separate PSU required for the sensor itself |
| Typical compatible module | Sierra Radio Systems SIR-335 |
Important Note
This listing is for the WaveNode WN-2.QRP QRP Sensor only.
Sierra SIR-335 watt meter control module, WaveNode meter, coaxial cables, radios, antennas, tuners, and other accessories are not included unless stated otherwise.
This sensor does not provide a display or monitoring interface by itself. It must be used with compatible WaveNode or Sierra monitoring hardware.
Please ensure the selected sensor is suitable for your frequency range, connector type, and maximum station power before installation.
Shipping & Delivery
We offer UK and international delivery services, including next working day and selected weekend options for eligible orders. Available services, prices and estimated delivery times are displayed at checkout.
Delivery Information
Delivery options depend on the parcel's size, weight, contents and destination. Express and weekend services are subject to availability and cut-off times. Oversized or exceptionally heavy items may require a specialist delivery quotation.
Returns & Cancellations
To arrange a return, please contact ML&S or complete our returns form. You may also exercise your statutory right to cancel by email or another clear statement, without completing the form.
Changed Your Mind?
Under the Consumer Contracts Regulations 2013, most purchases made online or by telephone can be cancelled within 14 days of receipt.
You must notify us of your cancellation within this period and return the goods within a further 14 days.
Please handle all goods with care. Returned items must be in a resaleable condition, complete with their original packaging, and all supplied accessories.
You may inspect goods as you would in a shop. Handling beyond what is necessary to inspect them may result in a lawful deduction for diminished value.
Exceptions
Modified Equipment & Reversal Charges
Additional return conditions may apply to equipment modified at the customer's request, including wideband transmit or receive modifications.
ML&S may charge a reasonable fee to reverse physical modifications and restore the equipment to its original factory specification. Any such charge will be agreed in advance and deducted from your refund.
Custom-Made Cable Assemblies
Coaxial cable assemblies manufactured to a customer's specifications are excluded from the 14-day return policy and are non-refundable unless faulty.
Software & Labour Charges
Labour and modification charges requested by the customer are non-refundable once the work has been completed.
Computer software may only be returned under the 14-day return policy if it remains sealed and unopened.
Return Postage Charges
Customers are responsible for the direct cost of returning unwanted or incorrectly ordered goods, where permitted by law. You may arrange your own suitable return postage or use one of our optional prepaid services.
Standard Parcels
Royal Mail Return Label
£5.95
Per parcel
For eligible standard-sized parcels, subject to Royal Mail restrictions. Free collection included.
Larger Parcels
DPD Return Label
£7.95
Per parcel
For larger or heavier parcels and any shipments with batteries.
Collection Service
DPD Collection
£25.00
Per parcel
Available upon request for eligible addresses, subject to availability.
Prepaid return charges will be confirmed before booking and deducted from your refund.
These prices apply to eligible UK mainland returns. Oversized items, specialist products and returns from other destinations may require a separate quotation. Estimated return costs will be disclosed before purchase.
Faulty or Incorrectly Supplied Goods
Return postage charges do not apply to faulty, damaged or incorrectly supplied goods returned under statutory rights. ML&S will arrange a free return in these circumstances.
Refunds
Refunds are processed without undue delay following receipt and inspection of returned goods, and no later than 14 days after we receive goods returned under statutory cancellation rights.
Refunds will be issued to the original payment method. Any prepaid return postage charges or lawful deductions for diminished value will be itemised.
Warranty Terms & Conditions
New Equipment Warranty
Minimum 2-Year Warranty
All new products supplied by ML&S carry a minimum two-year warranty against manufacturing defects, excluding batteries, which are covered by separate warranty terms.
Some manufacturers provide extended warranties, such as the three-year warranty available on eligible Yaesu equipment. Any additional coverage is subject to the manufacturer's terms and conditions.
Our workshop may assess and repair faulty equipment on site or refer it to the manufacturer or an authorised service centre where necessary.
Warranty exclusions may include batteries, normal wear and tear, accidental damage, misuse and unauthorised modifications, as specified in the applicable warranty terms.
All warranties are provided in addition to your statutory consumer rights against ML&S, which are not limited by the warranty period.
International Returns & Warranty
Unless otherwise stated, ML&S warranty servicing is carried out in the UK. International customers must contact us before returning goods to confirm shipping and customs requirements.
International customers are responsible for return postage unless the goods are faulty and ML&S has been notified within a reasonable time.
ML&S accepts no responsibility for additional charges resulting from incorrectly completed customs documentation. Any additional duties charged to ML&S as a result will be billed to the customer before return of the goods.
Need Help With a Return?
Our team can assist with returns, postage arrangements, modifications and warranty claims.
Nothing in these terms excludes or limits your statutory consumer rights.



