Senseca

TP32MTT.03 Multi-Level Soil Temperature Profiling Probe

Soil thermal profile probes with Pt100 1/3 DIN sensors for multi-level temperature monitoring.

6 or 7 measuring levels, from +5 cm to −50 cm (6-level) or −1 m (7-level)
0.01 °C resolution and ±0.1 °C accuracy at 0 °C
RS485 Modbus-RTU output, 6…30 Vdc power supply
IP68-rated fiberglass tube with 8-pole M12 connector

Quantity

Overview

The Senseca TP32MTT.03 series consists of soil thermal profile probes designed to measure temperature at multiple soil depths for environmental monitoring, agriculture and geothermic studies. The TP32MTT.03 measures at 7 levels (+5 cm, 0, −5 cm, −10 cm, −20 cm, −50 cm and −1 m), while the TP32MTT.03.1 measures at 6 levels (+5 cm, 0, −5 cm, −10 cm, −20 cm and −50 cm).

Each probe uses Pt100 1/3 DIN sensors with 0.01 °C resolution and ±0.1 °C accuracy at 0 °C. The IP68-rated fiberglass tube provides waterproof protection and thermal insulation along the vertical axis. RS485 Modbus-RTU output enables long-distance data transmission, while the 6…30 Vdc power supply and 8-pole M12 connector support integration into environmental monitoring systems.

Typical Applications

Multi-level soil temperature monitoring
Agricultural soil temperature studies
Environmental and meteorological monitoring
Geothermic studies and research

Key Features

6 or 7 Pt100 1/3 DIN sensors for multi-level soil temperature measurement
Measuring depths from +5 cm to −50 cm (TP32MTT.03.1) or −1 m (TP32MTT.03)
0.01 °C measurement resolution
±0.1 °C accuracy at 0 °C
RS485 digital output with Modbus-RTU protocol
6…30 Vdc power supply
IP68-rated fiberglass tube providing impermeability and thermal insulation
Stainless steel tip and anodized aluminium alloy handle with stainless steel top end
8-pole M12 male connector with optional 5 m or 10 m cables

Benefits

Multiple soil depths monitored with a single probe
Choice of 6 or 7 measuring levels to suit installation requirements
Precise temperature data for reliable soil thermal analysis
Durable, waterproof construction for demanding field conditions
Long-distance digital communication for remote monitoring
Easy integration with monitoring systems through flexible power and M12 connectivity

Specifications

Measurement Specifications
Measuring principle	Resistance temperature measurement using Pt100 sensors
Sensor type	Pt100 1/3 DIN
Measured parameter	Soil temperature at multiple levels
Measurement resolution	0.01 °C
Measurement accuracy	±0.1 °C at 0 °C
Temperature drift	0.003 %/°C at 20 °C

Sensor Configuration
TP32MTT.03	7 measuring levels: +5 cm, 0 cm, −5 cm, −10 cm, −20 cm, −50 cm, −1 m
TP32MTT.03.1	6 measuring levels: +5 cm, 0 cm, −5 cm, −10 cm, −20 cm, −50 cm
Reference level	0 cm corresponds to the soil surface

Electrical
Power supply	6…30 Vdc
Current consumption	5 mA at 12 Vdc

Communication and Interface
Digital output	RS485
Communication protocol	Modbus-RTU
Modbus address range	1…247 (default: 1)
Baud rate	9600 or 19200 bps (default: 19200 bps)
Default communication settings	19200 bps, 8 data bits, even parity, 1 stop bit (8E1)
Electrical connector	8-pole M12 male connector
Optional cable lengths	5 m or 10 m

Environmental
Stem operating temperature	−40…+125 °C
Hand grip operating temperature	−40…+85 °C
Ingress protection rating	IP68

Mechanical
Probe tube material	Fiberglass
Probe tip material	Stainless steel
Handle material	Anodized aluminium alloy
Handle top end material	Stainless steel
Tube characteristics	Impermeability and thermal insulation along the vertical axis

Installation and Maintenance
Installation method	Vertical insertion into a pre-prepared soil hole
Positioning reference	Zero-level indicator aligned with the soil surface
Soil contact	Fill gaps around the probe stem with finely powdered soil
Probe removal	Insert a pin into the Ø8 mm hole in the handle and pull vertically
Maintenance	Periodically verify probe alignment and keep the connector area clean