Exhibit 99.3

                          ALARIS MEDICAL SYSTEMS, INC.
      OFFER TO EXCHANGE $170,000,000 PRINCIPAL AMOUNT OF 11 5/8% SERIES B
        SENIOR SECURED NOTES DUE 2006, WHICH HAVE BEEN REGISTERED UNDER
       THE SECURITIES ACT OF 1933, FOR ANY AND ALL OF OUTSTANDING 11 5/8%
                     SERIES A SENIOR SECURED NOTES DUE 2006

To Our Clients:

    We are enclosing a Prospectus dated       , 2001 (the "Prospectus"), of
ALARIS Medical Systems, Inc. (the "Company") and a Letter of Transmittal (which
together constitute the "Exchange Offer") relating to the offer by the Company
to exchange up to $170,000,000 principal amount of the Company's 11 5/8%
Series B Senior Secured Notes due 2006 (the "Exchange Notes"), pursuant to an
offering registered under the Securities Act of 1933, as amended (the
"Securities Act"), for a corresponding principal amount of the Company's issued
and outstanding 11 5/8% Series A Senior Secured Notes due 2006 (the "Private
Notes"), upon the terms and subject to the conditions set forth in the Exchange
Offer.

    PLEASE NOTE THAT THE OFFER WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON
      , 2001, UNLESS EXTENDED.

    The Exchange Offer is not conditioned upon any minimum number of Private
Notes being tendered.

    We are the registered holder of Private Notes held by us for your account. A
tender of such Private Notes can be made only by us as the registered holder and
pursuant to your instructions. The Letter of Transmittal is furnished to you for
your information only and cannot be used by you to tender Private Notes held by
us for your account.

    We request instructions as to whether you wish to tender any or all of the
Private Notes held by us for your account (you may tender less than all of such
Private Notes and/or tender less than the full principal amount of any given
Private Note, provided that the amount tendered is in integral multiples of
$1,000) pursuant to the terms and conditions of the Exchange Offer. We also
request that you confirm that we may on your behalf make the representations
contained in the Letter of Transmittal that are to be made with respect to you
as beneficial owner.

    Pursuant to the Letter of Transmittal, each holder of Private Notes will
represent to the Company that (i) it is not an affiliate (as defined in
Rule 405 under the Securities Act) of the Company; (ii) it is not a
broker-dealer tendering Private Notes acquired for its own account directly from
the Company; (iii) any Exchange Notes to be received by it will be acquired in
the ordinary course of its business; and (iv) it is not engaged in, and does not
intend to engage in, a distribution of such Exchange Notes and has no
arrangement or understanding to participate in a distribution of Exchange Notes.
If a holder of Private Notes is engaged in or intends to engage in a
distribution of Exchange Notes or has any arrangement or understanding with
respect to the distribution of Exchange Notes to be acquired pursuant to the
Exchange Offer, such holder may not rely on the applicable interpretations of
the staff of the SEC and must comply with the registration and prospectus
delivery requirements of the Securities Act in connection with any secondary
resale transaction.

                                 Very truly yours,