What is the estimated growth rate of Intelex for the back half of the year 
w. As you say, we've really built out a portfolio that really can take advantage of the secular drivers around sustainability and, quite frankly, worker safety. And so we feel good about that. I think the Intelex platform itself adds tremendous value. As I mentioned in the prepared remarks, we use it for our own sustainability assessment, and it's a wonderful tool to help us understand how to think about goal setting and how to drive action to really improve, not just -- not just report on sustainability, but more importantly, take action. So I think we feel very good about the platform. We think there's investment opportunities in the future that we can make. So I think relative specifically to your question, Intelex has been a double-digit grower for us. It's mostly been in the teens. I think as we continue to build on it, really, as we hit the accelerator with some of the machine learning opportunities that we've really got with ehsAI, we'll start to see some of those things in the back half of the year. I think we can continue to move that growth rate. I'd like to think we can go beyond that. But I think in the near term, we certainly think it's a double-digit grower for sure.
Andy Kaplowitz -- Citigroup -- Analyst
Appreciate the color, Jim.
James A. Lico -- President and Chief Executive Officer
Thanks, Andy.
Operator
Your next question is from the line of Deane Dray with RBC Capital Markets.
James A. Lico -- President and Chief Executive Officer
Hi, Deane.
Deane Dray -- RBC Capital Markets -- Analyst
Thank you. Good afternoon.
James A. Lico -- President and Chief Executive Officer
Good afternoon.
Deane Dray -- RBC Capital Markets -- Analyst
I want to circle back on the implications of getting more site access. Could you give us a sense of maybe on a percent basis, how much has opened up? But more importantly, what are the implications? Is there a pent-up business that really has been depending on being able to get back in? Should we think about a catch-up here?
James A. Lico -- President and Chief Executive Officer
Yes. Look, I think site access comes in the way of two -- it comes in the form of two ways. Number one, I think on our -- anywhere where we have service businesses, but let's call it, non-healthcare. We certainly -- we've gone to remote capability, but it takes longer to turn customers on and software as an example. And so I think there is some pent-up demand. But I think, to be honest with you, Deane, we've had such little access here over the last several-several months that it's hard to predict how quickly it will open up, particularly when you think about that on a global basis. So we certainly believe it's going to continue to improve, but I wouldn't say necessarily that we think it's going to all be better by the end of the year. We just don't have enough visibility yet to -- I think most customers aren't really opening up here until maybe the third quarter. So I think it's still a little early to predict it. But I think the predictions that we have are really based on some of the trends we've seen, which we feel good about. But I think they could get better if we could see vaccinations get more -- more prolific here and start to see more opening up of businesses. So that's on -- that's everywhere from Gordian and Accruent to eMaint to those -- even like our Tektronix Calibration business, which some of it is on site. On the healthcare side, we certainly think that we can continue to have access. We're in hospitals today doing service for the most part, but everything is a little slower. We mentioned in the Censis prepared remarks, though, that we are starting to see purchasing decisions free up a little faster. And again, that's all built into our guide as well that we think we continue to get better. But I think at the end of the day, it is because pockets in the United States plus the nations, it's really too hard -- it's still a little difficult to necessarily predict exactly how that opens up in a sense of any of the pent-up demand, if you will.
Deane Dray -- RBC Capital Markets -- Analyst
Grea
w. As you say, we've really built out a portfolio that really can take advantage of the secular drivers around sustainability and, quite frankly, worker safety. And so we feel good about that. I think the Intelex platform itself adds tremendous value. As I mentioned in the prepared remarks, we use it for our own sustainability assessment, and it's a wonderful tool to help us understand how to think about goal setting and how to drive action to really improve, not just -- not just report on sustainability, but more importantly, take action. So I think we feel very good about the platform. We think there's investment opportunities in the future that we can make. So I think relative specifically to your question, Intelex has been a double-digit grower for us. It's mostly been in the teens. I think as we continue to build on it, really, as we hit the accelerator with some of the machine learning opportunities that we've really got with ehsAI, we'll start to see some of those things in the back half of the year. I think we can continue to move that growth rate. I'd like to think we can go beyond that. But I think in the near term, we certainly think it's a double-digit grower for sure.
Andy Kaplowitz -- Citigroup -- Analyst
Appreciate the color, Jim.
James A. Lico -- President and Chief Executive Officer
Thanks, Andy.
Operator
Your next question is from the line of Deane Dray with RBC Capital Markets.
James A. Lico -- President and Chief Executive Officer
Hi, Deane.
Deane Dray -- RBC Capital Markets -- Analyst
Thank you. Good afternoon.
James A. Lico -- President and Chief Executive Officer
Good afternoon.
Deane Dray -- RBC Capital Markets -- Analyst
I want to circle back on the implications of getting more site access. Could you give us a sense of maybe on a percent basis, how much has opened up? But more importantly, what are the implications? Is there a pent-up business that really has been depending on being able to get back in? Should we think about a catch-up here?
James A. Lico -- President and Chief Executive Officer
 Yes. Look, I think site access comes in the way of two -- it comes in the form of two ways. Number one, I think on our -- anywhere where we have service businesses, but let's call it, non-healthcare. We certainly -- we've gone to remote capability, but it takes longer to turn customers on and software as an example. And so I think there is some pent-up demand. But I think, to be honest with you, Deane, we've had such little access here over the last several-several months that it's hard to predict how quickly it will open up, particularly when you think about that on a global basis. So we certainly believe it's going to continue to improve, but I wouldn't say necessarily that we think it's going to all be better by the end of the year. We just don't have enough visibility yet to -- I think most customers aren't really opening up here until maybe the third quarter. So I think it's still a little early to predict it. But I think the predictions that we have are really based on some of the trends we've seen, which we feel good about. But I think they could get better if we could see vaccinations get more -- more prolific here and start to see more opening up of businesses. So that's on -- that's everywhere from Gordian and Accruent to eMaint to those -- even like our Tektronix Calibration business, which some of it is on site. On the healthcare side, we certainly think that we can continue to have access. We're in hospitals today doing service for the most part, but everything is a little slower. We mentioned in the Censis prepared remarks, though, that we are starting to see purchasing decisions free up a little faster. And again, that's all built into our guide as well that we think we continue to get better. But I think at the end of the day, it is because pockets in the United States plus the nations, it's really too hard -- it's still a little difficult to necessarily predict exactly how that opens up in a sense of any of the pent-up demand, if you will.
Deane Dray -- RBC Capital Markets -- Analyst
Grea