Products / CTM02

CTM02 Dual-Probe Concrete Logger

Two probes, one device. Place one near the top of the pour and one near the bottom, and follow the temperature difference across the section from your phone, every 15 minutes.

2 probes

2 m + 3 m, or custom

2.4 GHz RF

Wireless link to the app

~6 months

Stored on the device

Top, Bottom, and the Difference

In thick pours the core and the surface cure at different temperatures. CTM02 measures both so you can see the gap.

Top probe

Placed near the surface, where the concrete loses heat fastest.

Bottom probe

Placed deeper in the section, where heat builds up during curing.

Body sensor

Built into the housing and measures the temperature at the logger itself.

Temperature difference

With both probes reporting, you can watch the top-to-bottom difference that matters for thermal cracking in thick sections.

The maturity method

Concrete tells you how strong it is. Through heat.

01Pour0 h Probes go in before the concrete. Tie the probe to the rebar at the point you care about, usually the core of the section. Switch the sensor on and it records a reading every 15 minutes.

02Heatfirst 1 to 2 days Hydration heats the core. Cement reacts with water and releases heat, usually peaking within the first day. With CTM02 you see the top and the bottom of the pour side by side.

03Strengthday 2 to 4 Heat × time = maturity. The maturity method turns the temperature history into an estimate of in-place strength, so you depend less on waiting for cube results.

04Readyday 4+ Strip on data, not the calendar. When the estimated strength reaches your target, plan formwork removal with the full temperature record to back the decision.

Probe tied to rebar CTM01 recording Core 18.0°C Top vs bottom watched Maturity rising 0.0 MPa estimated Target strength reached Records saved in the cloud

Age0 h

Core temp18.0°C

Strength0.0 MPa

Illustrative curing curve. Real values depend on your mix and site conditions.

On and Connected in Under a Minute

One button, one scan. No pairing menus or settings to change.

STEP 1

Switch on

Press and hold the button for 3 seconds. One long flash of the LED confirms the device is on.

STEP 2

Scan the QR code

Open the Proxigen app and scan the QR code on the device.

STEP 3

See the first reading

The app connects automatically and shows the first temperature from the body and both probes.

No Reading Gets Lost

CTM02 records the temperature every 15 minutes and keeps it in its own memory, with room for about 6 months of readings. When the app connects, every stored reading is sent across and saved in Proxigen Cloud.

Missed a site visit? The data waits on the device until you are back.

Every 15 minutes

Reading interval

About 6 months

Readings stored on the device

Full sync

All stored readings upload when the app connects

Technical Specifications

CTM02 specifications

Probes

Probe lengths

2 m and 3 m as standard; custom lengths on request

Sensors

Two probe sensors + built-in body sensor

Differential

Temperature difference between the two probes

Wireless

2.4 GHz RF

Connection

Proxigen app on iOS and Android, data synced to Proxigen Cloud

Reading interval

Every 15 minutes

On-device storage

About 6 months of readings; storage outlasts the battery

Battery

3.0 V

Indicator

Single-colour LED; one long flash when switched on

Power

Press and hold the button for 3 seconds

Setup

Scan the QR code on the device in the Proxigen app

Need a different probe length? We build probes to order. Tell us your pour depth and we will match it.

Downloads

Brochure and Technical Guide

Two free PDFs for your team and your consultant. Both cover CTM01 and CTM02.

Cover of the Proxigen Concrete Monitoring Brochure

Overview · 7 pages Product Brochure What we sell: the CTM01 and CTM02 sensors, how monitoring works from the pour to your phone, and the Proxigen app and cloud. Download PDF1.9 MB

Cover of the Proxigen Setup and Technical Guide for CTM01 and CTM02

Technical · 10 pages Setup & Technical Guide How the device works: parts, technical specifications, installation in the concrete or on formwork, app setup and cloud dashboard. Download PDF1.5 MB

Only need one measuring point?

CTM01 uses a single probe in 30 cm or 3 m for everyday slabs and elements.

Planning a Large Pour?

Tell us the section depth and we will set up CTM02 probe lengths to match.