Graham-Field Grafco Digital TENS Unit

Graham-Field Grafco Digital TENS Unit is a dual-channel digital stimulator for active treatment application. The electronics of Grafco creates electric impulses, intensity, duration and frequency per second. It has a liquid crystal display indicating operation modes and output as well as an 8 bit microcomputer for controlling the system. Modulation of these impulses can be adjusted.

Grafco Digital TENS Unit


  • TENS Unit
  • Molded carrying case
  • Instructions Manual
  • 4 Electrodes
  • Lead wires

Device Controls:

Graham-Field Grafco Digital TENS Unit

Indications For Use:

  • To be used under a physicians prescription for the symptomatic relief
  • Management of long-term chronic pain
  • Treatment of post-operative or post-traumatic pain


Requires one 9-Volt alkaline or nickel-cadmium rechargeable battery (not included).

Click Here For User Manual

More On Grafco Digital TENS Unit

What is TENS (Transcutaneous Electrical Nerve Stimulation)?

  • TENS is a treatment whereby electrical impulses are applied to nerves through electrode pads placed on the skin
  • TENS is non-invasive and does not use pharmaceuticals

2-Pronged Approaches to Pain Relief:

  • First, sensory nerves are targeted, stimulating them to block pain signals and prevent their transmission to the brain
  • Second, TENS promotes the production of endorphins, eurochemicals occurring naturally in the brain which have analgesic properties

Operating Grafco TENS Unit:

  1. Connect the lead wires to the electrodes before applying the electrodes to the skin. Note: Ensure both intensity controls for Channel 1 and 2 are turned to the “OFF” Position (counterclockwise) before applying the electrodes.
  2. Place the electrodes on the skin as recommended by your physician/clinician.
  3. Insert Lead Wire Connector into the Device: Plug end of lead wire into the channel output port (jack) to be used; push the plug in as far as it will go.
  4. Select Treatment Settings: Ensure your unit is still set to the proper settings recommended by your physician/clinician.
  5. Adjusting Channel Intensity Control: Locate the intensity control knob (Channel 1 or 2) at the top of the unit. Slowly turn the intensity control knob clockwise until the stimulation is at the level recommended by your physician/clinician. (If you do not feel anything, turn the knob OFF then ON again and carefully turn the control knob until you feel a tingling or slight twitch under or around the electrodes.) Always start with the lowest setting and increase the intensity slowly. If the stimulation levels are uncomfortable or become uncomfortable, reduce the stimulation amplitude to a comfortable level; or cease stimulation and contact your physician.
  6. Setting Patient Compliance Counter:
    - To turn counter on: While the unit is ON, hold down the UP button and press the MODE button at the same time.
    - To Reset Counter: While the unit is ON, press UP button and press the MODE button at the same time (this will take you into the compliance counter), then push the DOWN button and press MODE button at the same time.
    - Press the UP and MODE buttons at the same time to return to the treatment status.
    If the stimulation levels are uncomfortable or become uncomfortable, reduce the stimulation intensity to a comfortable level; or if problems persist, cease stimulation and contact your physician/clinician.


  • Any electrode placement which applies current to the carotid (neck) region
  • Patients with implanted electronic devices (for example, a pacemaker) or metallic implants should not undergo TENS treatment without first consulting a physician
  • Any electrode placement which causes current to flow transcerebrally (through the head)
  • The use of unit whenever pain symptoms are un-diagnosed and the etiology is unknown


ChannelDual, isolated between channels
Pulse AmplitudeAdjustable 0 mA to 80 mA peak into 500* load each channel, constant current
Pulse Rate1Hz to 150Hz (adjustable)
Pulse Width30 to 300uS (adjustable)
Timer10, 20, 30, 40, 50, 60 minutes and continuous
Patient Compliance counter To show the usage time by user, counted per each
30 minutes treatment time
Patient Lock SystemTo prevent changes in any set parameter by physician/clinician. To unlock or lock the unit, press the UP and DOWN button simultaneously for 2 to 3 seconds
Wave FormMono Positive-Phasic Square pulse, Negative-Phasic Square Pulse,
Asymmetrical Bi-Phasic Square Pulse
LCDDisplay Timer, Function Mode, Alternate mode, Pulse Rate, Pulse Width,
Battery Low and Patient Compliance Meter, Lock symbols
Function ModeM Mode Modulated width: Pulse width is automatically varied in an interval of 6 seconds. The modulation range of pulse width is from setting value to 60% less than the control setting value, then returns to the setting value. Pulse Rate and Pulse Width are adjustable.
MM Mode Modulated Rate and Width: This mode consists of alternating modulated width and modulated rate. One parameter is always decreasing while
the other is increasing and vice-versa. The modulation range is 50% decreasing.
Stimulation ModeBurst: PW adjustable
Constant: PR/PW adjustable
3 Modulation Capacities:
M: PR/PW modulation
A(SD1): PR/PW modulation
S(SD2): PR/PW modulation
Treatment Memory FunctionMemorize the last set of operation records
Reset Memory FunctionYes
Compliance TimerTotal record time is 999 minutes
Reset Compliance TimerYes
Low BatteryYes
Function Control CoverYes
Belt ClipMetal belt clip for strength (Rotates 360°)
Weight90 grams (without battery)
Size95 mm x 60 mm x 25mm
DisplayOutput indicator, Low battery, Output amplitude (mA), PW, PR, Timer, Compliance Timer,
Stimulation Modes

Customer Reviews


ItemName - now     10/20/2021

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Nora     12/22/2016

i have both right and left hip replacements. how close to prosthesis can tens patches be put? What does one do when patches wear out, become non-sticky? Do you offer a warranty or return policy if one is not pleased with the item?


Customer Care    02/02/2017

Graham Field does not recommend putting the electrode pads near prosthesis and the pads should be replaced when they no longer firmly stick. 

There is a 1 year warranty against defects on Graham-Field Grafco Digital TENS Unit. 
Please check our return policy.


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What is HPFY’s return policy?

Customer satisfaction is our top priority. We stand behind our products. If the merchandise you received is defective or not what you expected it to be, and you wish to return the item, please submit a return request in the My Account section of our website, contact our Customer Service department at (866) 316-0162 / (203) 616-2850 or email us.

  1. Merchandise must be returned within 30 days of the receipt of your order. Returns are not accepted after 30 days.
  2. Items (including parts and accessories) must be returned in new, unused, and resalable condition in its original packaging.
  3. Before returning any product, the buyer must obtain a Return Authorization Number (RA#) from a customer service representative. With your RA# you will receive a prepaid return shipping label.
  4. Orders returned without obtaining an RA# will be entitled to receive only "In-Store Credit" that can be used towards future purchases.
  5. Return orders are subject to a 20% restocking fees.
  6. All custom orders and hygienic items are non-returnable. Refer to the “Non-Returnable Items” section for further details.
  7. Returns will be reviewed and inspected before issuing credit. Please allow 3 to 4 weeks for processing. The credit will be applied to your original method of payment.
  8. If the return is the result of a defective product or shipping error, we will refund the entire purchase amount and return shipping costs.

Which products are Non-Returnable?

Due to the hygienic nature of some items, they are non-returnable. The items listed below are non-returnable:

  1. All hygienic items.
  2. Opened personal care items.
  3. Anything opened, used, or tried on.
  4. All customized items.
  5. Besides these, items that have the “non-returnable” phrase on the website.

We reserve the right to make adjustments due to errors, changing market conditions, product discontinuation or typographical errors in advertisements. Images on the site may not always reflect the actual product. Footrests or leg-rests are not included with wheelchairs unless specified.

How do I receive a return authorization number?

You can submit a return request by logging into your account. You will receive the Return Authorization Number (RA#) details in the email within 2-3 business days.

  • Login to your account
  • Go to “order history”
  • Click on “return order”
  • Fill out the return form and Submit it

If you do not have an email address, we will make other accommodations for RA# Details. Write the RA# on your label affixed to your package prior to shipment.

How long does it take to receive a refund?

Please allow 3 to 4 weeks to process the returns. Once the item is received, and inspected, your refund will be processed and automatically applied to your credit card or original method of payment.

Is there any Restocking Fees?

  1. 20% restocking fees will be applied.
  2. Outbound shipping cost is non-refundable.
  3. For orders that qualified for free shipping, $8.99 will be deducted from the refund if the product is returned.

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