EXHIBIT 99.1

IDEX REPORTS RECORD FIRST QUARTER RESULTS – EPS OF 74 CENTS, UP 12%

LAKE FOREST, IL, APRIL 22 – IDEX Corporation (NYSE: IEX) today announced its financial results for the three month period ended March 31, 2013.

Sales in the quarter totaled $494 million, 1 percent higher than the prior year period and down 1 percent on an organic basis.

First quarter 2013 operating income was $95 million. This resulted in an operating margin of 19.2 percent, up 90 basis points from the prior year adjusted operating margin, primarily due to productivity and benefits from our structural cost actions taken in prior years.

First quarter earnings per share were 74 cents, an increase of 8 cents, or 12 percent, from the adjusted prior year.

Free cash flow was $67 million for the quarter, a 28 percent increase from prior year first quarter due to higher earnings.

First Quarter Highlights

“Excellent operating income growth, margin improvement and cash generation marked IDEX’s first quarter of 2013. As anticipated, orders proved a tough year-over-year comparison due to the large dispensing replenishment project in 2012. Orders decreased 3 percent year-over-year, but were up 7 percent sequentially, and we built over $20 million of backlog during the quarter. I am pleased with our ability to execute and deliver a 90 basis point improvement in operating margin and a 12 percent increase in EPS. The expected benefits from the recently completed restructuring and structural cost actions are being realized in our financials.

Previously I highlighted our team’s focus on executing a disciplined capital deployment plan of strategic acquisitions, shareholder dividends and share repurchases. In March, we successfully completed the acquisition of FTL Seals Technology (“FTL”). FTL is a leader in specialty seals and bearings, and will operate alongside Precision Polymer Engineering to expand our capabilities in proprietary sealing solutions. We are excited to have FTL join the IDEX portfolio. The IDEX Board of Directors also approved a 15 percent increase to the quarterly shareholder dividend, now 23 cents. We continued to execute our share repurchase program throughout the first quarter and expect it to continue throughout 2013.

On a regional basis, North America is improving, Europe remains soft and Asia is uneven. Despite this difficult organic growth environment, we are confident we can continue to generate strong operating margins and cash flows. We project second quarter 2013 EPS to be in the range of 73 to 75 cents, while maintaining our full year 2013 EPS guidance of $2.85 to $2.95, based on low- to mid-single digit organic revenue growth.”

First Quarter 2013 Business Highlights (Operating margin excludes restructuring charges in 2012)

Fluid & Metering Technologies

Health & Science Technologies

Fire & Safety/Diversified Products

For the first quarter of 2013, Fluid & Metering Technologies contributed 43 percent of sales and 44 percent of operating income; Health & Science Technologies accounted for 35 percent of sales and 30 percent of operating income; and Fire & Safety/Diversified Products represented 22 percent of sales and 26 percent of operating income.

FTL Seals Technology Acquisition

As previously announced, IDEX acquired FTL Seals Technology, Ltd, a leader in the design and application of high integrity rotary seals, specialty bearings and other custom products for the oil & gas, mining, power generation and marine markets. FTL, located in Leeds, England, has annual revenue of approximately £15 million and will operate with Precision Polymer Engineering within our Health & Science Technologies segment.

EBITDA and Free Cash Flow

EBITDA means earnings before interest, income taxes, depreciation and amortization, while free cash flow means cash flow from operating activities less capital expenditures plus the excess tax benefit from stock-based compensation. Management uses these non-GAAP financial measures as internal operating metrics and for enterprise valuation purposes. Management believes these measures are useful as analytical indicators of leverage capacity and debt servicing ability, and uses them to measure financial performance as well as for planning purposes. However, they should not be considered as alternatives to net income, cash flow from operating activities or any other items calculated in accordance with U.S. GAAP, or as an indicator of operating performance. The definitions of EBITDA and free cash flow used here may differ from those used by other companies.

EBITDA and Free Cash Flow Bridge

Conference Call to be Broadcast over the Internet

IDEX will broadcast its first quarter earnings conference call over the Internet on Tuesday, April 23, 2013 at 9:30 a.m. CT. Chairman and Chief Executive Officer Andy Silvernail and Vice President and Chief Financial Officer Heath Mitts will discuss the Company’s recent financial performance and respond to questions from the financial analyst community. IDEX invites interested investors to listen to the call and view the accompanying slide presentation, which will be carried live on its website at www.idexcorp.com. Those who wish to participate should log on several minutes before the discussion begins. After clicking on the presentation icon, investors should follow the instructions to ensure their systems are set up to hear the event and view the presentation slides, or download the correct applications at no charge. Investors will also be able to hear a replay of the call by dialing 855.859.2056 (or 404.537.3406 for international participants) using the ID # 26072848.

Forward-Looking Statements

This news release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Exchange Act of 1934, as amended. These statements may relate to, among other things, capital expenditures, cost reductions, cash flow, and operating improvements and are indicated by words or phrases such as “anticipate,” “estimate,” “plans,” “expects,” “projects,” “should,” “will,” “management believes,” “the company believes,” “the company intends,” and similar words or phrases. These statements are subject to inherent uncertainties and risks that could cause actual results to differ materially from those anticipated at the date of this news release. The risks and uncertainties include, but are not limited to, the following: economic and political consequences resulting from terrorist attacks and wars; levels of industrial activity and economic conditions in the U.S. and other countries around the world; pricing pressures and other competitive factors, and levels of capital spending in certain industries – all of which could have a material impact on order rates and IDEX’s results, particularly in light of the low levels of order backlogs it typically maintains; its ability to make acquisitions and to integrate and operate acquired businesses on a profitable basis; the relationship of the U.S. dollar to other currencies and its impact on pricing and cost competitiveness; political and economic conditions in foreign countries in which the company operates; interest rates; capacity utilization and the effect this has on costs; labor markets; market conditions and material costs; and developments with respect to contingencies, such as litigation and environmental matters. The forward-looking statements included here are only made as of the date of this news release, and management undertakes no obligation to publicly update them to reflect subsequent events or circumstances. Investors are cautioned not to rely unduly on forward-looking statements when evaluating the information presented here.

About IDEX

IDEX Corporation is an applied solutions company specializing in fluid and metering technologies, health and science technologies, and fire, safety and other diversified products built to its customers’ exacting specifications. Its products are sold in niche markets to a wide range of industries throughout the world. IDEX shares are traded on the New York Stock Exchange and Chicago Stock Exchange under the symbol “IEX”.

For further information on IDEX Corporation and its business units, visit the company’s website at www.idexcorp.com.

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