Exhibit 31.2 CERTIFICATION OF PRINCIPAL
FINANCIAL OFFICERPursuant to
Section 302(a) of the Sarbanes-Oxley Act of 2002 I, Drew A.
Moyer, certify that: 1.
I have reviewed this quarterly report on Form
10-Q of Technitrol,
 Inc. (the registrant);2.
Based on my knowledge, this quarterly report
does not contain any
 untrue statement of a material fact or omit to state a material fact
 necessary to make the statements made, in light of the circumstances under
 with such statements were made, not misleading with respect to the period
 covered by this quarterly report;3.
Based on my knowledge, the financial
statements, and other financial
 information included in this quarterly report, fairly present in all material
 respects the financial condition, results of operations and cash flows of
 Technitrol as of, and for the periods presented in this quarterly report.4.
The registrants other certifying officer
and I are responsible for
 establishing and maintaining disclosure controls and procedures (as defined
 in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:a)
designed such disclosure controls and
procedures, or caused such
 disclosure controls and procedures to be designed under our supervision, to
 ensure that material information relating to the registrant, including its
 consolidated subsidiaries, is made known to us by others within those entities,
 particularly during the period in which this report is being prepared;b)
designed such internal control over financial
reporting, or caused
 such internal control over financial reporting to be designed under our
 supervision, to provide reasonable assurance regarding the reliability of
 financial reporting and the preparation of financial statements for external
 purposes in accordance with generally accepted accounting principles;c)
evaluated the effectiveness of the
registrants disclosure controls
 and procedures and presented in this report our conclusions about the
 effectiveness of the disclosure controls and procedures as of the end of the
 period covered by this report based on such evaluation; andd)
disclosed in this report any change in the
registrants internal
 control over financial reporting that occurred during the registrants most
 recent fiscal quarter (the registrants fourth fiscal quarter in the case of
 an annual report) that has materially affected, or is reasonably likely to
 materially affect, the registrants internal control over financial
 reporting;5.
The registrants other certifying officer
and I have disclosed, based
 on our most recent evaluation of internal control over financial reporting,
 to the registrants auditors and the audit committee of the registrants
 board of directors (or persons performing the equivalent function):a)
all significant deficiencies and material
weaknesses in the design or
 operation of internal controls over financial reporting which are reasonably
 likely to adversely affect the registrants ability to record, process,
 summarize and report financial information; andb)
any fraud, whether or not material, that
involves management or other
 employees who have a significant role in the registrants internal controls.  Date:
November 3,
 2008
/s/ Drew A.
 MoyerDrew A.
 MoyerSenior Vice
 President and Chief Financial Officer(Principal
 Financial Officer)