V.S.W.R / POWER METER 

Working of Standing Wave Ratio (SWR) Meters

The standing wave ratio meter, SWR meter, ISWR meter (current "I" SWR), or VSWR meter (voltage SWR) measures the standing wave ratio (SWR) in a transmission line.[a] The meter indirectly measures the degree of mismatch between a transmission line and its load (usually an antenna). Electronics technicians use it to adjust radio transmitters and their antennas and feedlines to be impedance matched so they work together properly, and evaluate the effectiveness of other impedance matching efforts.

The actual impedance of any load is the reactance and resistance together. But, the SWR meter cannot measure both, instead measures the mismatch. To measure the impedance, more complex radio frequency measuring devices must be used. For the SWR meter readings to be accurate, the device must be matched on to the line impedance.
Any transmission line will have a certain loss. When this loss occours, the reflected signal will be attenuated when it travels back along the line. Thus, for the SWR meter to be efficient, it must be connected very near to the antenna and further away from the load. The value of SWR will be more when it is nearer to the load.
When using a passive type SWR meter it is always better to remove the device from the line. As these devices have diodes and other harmonics producing components, intermodulation may occour.

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SURECOM SW-102N 125-525 Mhz  VHF/UHF Power & SWR Meter

Technical Parameter

● Measurement Frequency:  125-525MHz

● Power Input:120W

● Display: LCD 

● Accuracy : +- 5% 

● Port SWR: < 1.1

● Battery: 3.7V Li-ion 600mah 
● SW102VU-S Input connect: SO239(SL16)
● SW102VU-N Input connect: N

● Size: 76mm x 77mm x 35mm

● Weight: 220 grams

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SURECOM SW-102HF  1.5 -70 Mhz  POWER & SWR Meter

Technical Parameter

● Measurement Frequency: 1.5-70MHz

● Power Input:120W

● Display: LCD 

● Accuracy : +- 5% 

● Port SWR: < 1.1

● Battery: 3.7V Li-ion 600mah 
● Input connect: SO239 

● Size: 76mm x 77mm x 35mm

● Weight: 220 grams

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SW-33MARKII

SURECOM SW-33 markII  125-525 Mhz Mini Digital VHF/UHF Power & SWR Meter

Technical Parameter

● Measurement Frequency:  125-525MHz

● Power Input:100W

● Display: LED

● Accuracy : +- 5% 

● Port SWR: < 1.1

● Battery: Li-ion 500mah 
● Input connect: SMA female 

● Size: 25mm x 25mm x 60mm

● Weight: 160 grams

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SURECOM SW-33 PLUS  125-525 Mhz Mini Digital VHF/UHF Power & SWR Meter

Technical Parameter

● Measurement Frequency:  125-525MHz

● Power Input:100W

● Display: LCD

● Accuracy : +- 5% 

● Port SWR: < 1.1

● Battery: Li-ion 500mah 
● Input connect: SMA female 

● Size: 25mm x 25mm x 60mm

● Weight: 160 grams

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SURECOM SF-20 100-525 Mhz Mini Digital VHF/UHF Power Meter

Technical Parameter

● Measurement Frequency:  100-525MHz

● Power Input: 20W

● Frequency Counter:20-999MHz 

● Display: LED

● Accuracy : +- 5% 

● Port SWR: < 1.1

● Battery: Li-ion 500mah 
● Input connect: BNC male 

● Size: 25mm x 25mm x 87mm

● Weight: 220 grams

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SURECOM SW-111  27-30 Mhz SWR Power Meter

Technical Parameter

● Measurement Frequency:  27-30MHz

● Power Input:100W
● Input connect: SO239 

● Size: 84mm x 59mm x 52mm

● Weight: 260 grams

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SW-114 CB 27-30 Mhz SWR /Power Meter
If you're looking for an SWR meter that can tune your antenna and measure field strength, this dual window 100-watt CB SWR Meter is a great choice! It measures up to 100 watts and has two separate windows: one for SWR reading and the other for power measurement.

 

Technical Parameter

● Measurement Frequency: 27-30MHz

● Power Input:100W

● 2 separate windows

● Input connect: SO239 

● Size: 120mm x 60mm x 65mm

● Weight: 410 grams

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SW-33

SURECOM SW-33 125-525 Mhz Mini Digital VHF/UHF Power & SWR Meter

Technical Parameter

● Measurement Frequency:  125-525MHz

● Power Input:100W

● Display: LED

● Accuracy : +- 5% 

● Port SWR: < 1.1

● Battery: Li-ion 500mah 
● Input connect: SMA female 

● Size: 25mm x 25mm x 60mm

● Weight: 160 grams