Amrex MS401B Bi/Mono Phasic Muscle Stimulator | 4 Channel Skip to content

Amrex MS401B Bi Phasic / Mono Phasic Low Volt Muscle Stimulator

4.9 · 128 reviews
$2,800.00
More payment options

Buy Online Or Call Now To Order!

✓ Free Shipping - on most Amrex products

✓0% Financing Available - Amrex + 0% APR, Applicable at Checkout

✓In Stock - orders leave the warehouse in 3-5 business days

✓Questions? - Call 317-401-9687

Zero Sales Tax
Manufactor Warranty
Authorized Dealer Guarantee
Full manufacturer warranty, genuine product, and expert support — every order ships from an authorized dealer.

Not sure which stimulator is right for you?

A recovery specialist can help you compare TENS and EMS units, channels, waveforms and electrodes. Mon–Fri, 9–5 EST.

Amrex MS401B

Four channels. Eight pads. Two waveforms.

The Amrex MS401B is a four-channel low volt stimulator that drives up to eight pads, with a choice of bi phasic or mono phasic output.

Run it in continuous, surge or reciprocal mode with selectable pulse rate and on/off times. A safety reset in the intensity controls, a patient stop switch and a 30-minute timer round it out.

More channels, more options.

  • Quad channelUp to eight pads with four intensity knobs.
  • Bi or mono phasicPick the waveform polarity for each session.
  • Three output modesContinuous, surge or reciprocal.
  • Safety firstIntensity reset and a patient-operated stop switch.
Amrex MS401B four-channel bi phasic / mono phasic muscle stimulator

Controls

Selectable, not guesswork.

Stepped knobs set pulse rate, surge on and off times and reciprocal timing, with a separate intensity knob and output indicator for each channel.

Tech specs.

In the box

  • Patient treatment stop switch
  • 8 x 4" Flextrode pads
  • 40 x 4" Flextrode covers
  • 4 dual retractable patient leads
  • Flextrode conductive spray
  • 6 x 22" and 2 x 42" retention straps
  • Hospital-grade power cord
Channels
Four (eight pads)
Waveforms
Bi phasic or mono phasic
Output modes
Continuous, surge, reciprocal
Output voltage
85 V peak into 1 kOhm; 15 V peak into 100 Ohm
Output intensity
30 µC max per pulse into 100 Ohm
Pulse width
200 µs at 50% V max
Frequency
1, 3, 5, 10, 20, 28, 40, 60, 80, 100, 120, 160 pps
Surge on / off
1-30 s on; 2.5-90 s off
Timer
30 minutes
Power
120 VAC, 60 Hz; detachable cord
Dimensions
11.5" W x 11" D x 5.75" H
Weight
6.8 lb
Prescription
Rx only

Questions? Answers.

How many channels does the MS401B have?

Four. Amrex specifies it as a quad-channel stimulator that supports up to eight electrode pads.

Do I need a prescription?

Yes. This is a prescription device. US federal law limits its sale to licensed practitioners or to buyers acting on a practitioner's order.

What warranty does it have?

Amrex covers the generator for 2 years, parts and labor.

Amrex warranty: 2 years on the generator, parts and labor.

Reviews.