JUMO HEATtemp Screw-in RTD Temperature Probe

Overview of JUMO HEATtemp RTD Temperature Probe

The JUMO HEATtemp screw-in RTD temperature probe is a high-precision sensor engineered specifically for heat meter applications and temperature monitoring in closed pipeline systems. Operating within a measurement range of 0 to 180°C and supporting temperature differences (ΔT) from 3 to 180 K, this probe offers outstanding accuracy and thermal stability required for modern energy metering and thermal transfer monitoring.

Optimized Direct Mounting for Rapid Thermal Response

Achieving reliable energy measurement requires instantaneous, highly accurate thermal feedback. The JUMO HEATtemp features a direct-mounting design (Type DL – direct long) without the need for an additional immersion sleeve. By placing the stainless steel protection tube directly into the flowing medium (with maximum flow velocities up to 2 m/s in water), the probe eliminates intermediate thermal resistance, delivering a dynamic response time of t0.5 ≤ 5 s.

Robust Engineering and Flexible Configurations

Constructed for demanding industrial and commercial HVAC environments, the sensor includes an aluminum die-cast terminal head (Form J standard, optional Form B) rated IP65 against dust and moisture ingress, functioning reliably across ambient temperatures from -20 to +100°C.

Customers can select between continuous protection tubes (Ø 6 mm) or stepped-down tubes (Ø 8 mm stepped to Ø 6 mm) with insertion lengths (EL) ranging from 85 mm to 280 mm to suit standard pipe dimensions. The process connection utilizes a standard G 1/2 stainless steel thread, providing secure sealing under maximum system operating pressures up to PS 25.

Sensor Technology and Metrological Standards

Inside the probe, high-grade platinum resistance sensors—available in Pt100, Pt500, or Pt1000 element types—comply strictly with DIN EN 60751. Connections can be configured in either two-wire or four-wire circuits across Tolerance Classes B, A, or AA to match specific electronic heat meter requirements.

Furthermore, the JUMO HEATtemp fully fulfills European Directive 2014/32/EU (MID) requirements, as well as AGFW FW 202 and FW 211 standards. It is available as paired probes and conformity-assessed sub-assemblies for heat meters under MID Module D production certification, making it a reliable solution for official energy billing and certified heat metering setups.

Applications

• Heat Metering Systems: Sub-assembly temperature sensor for certified energy and heat meters (MID compliant).

• Closed Pipeline Networks: Hydronic heating systems, district heating networks, and chilled water loops.

• HVAC & Building Automation: Continuous liquid temperature monitoring in commercial and industrial HVAC installations.

• Process Thermal Monitoring: Liquid media temperature sensing up to 180°C under pressure up to PS 25.

Technical Specifications

• Measurement Range: 0 to 180°C

• Temperature Difference (ΔT): 3 to 180 K

• Sensor Type: Platinum RTD sensor according to DIN EN 60751 (Pt100, Pt500, Pt1000)

• Circuit Type: 2-wire or 4-wire circuit

• Tolerance Class: Class B (standard), Class A, Class AA

• Terminal Head: Form J aluminum die-cast (standard) or Form B; M16×1.5 cable gland

• Ambient Temperature (Head): -20 to +100°C

• Protection Class: IP65

• Protection Tube: Stainless steel, Ø 6 mm or Ø 8 mm stepped down to Ø 6 mm

• Insertion Length (EL): 85 mm to 280 mm

• Minimum Immersion Depth: 25 mm

• Process Connection: Stainless steel G 1/2 thread

• Maximum Operating Pressure: PS 25

• Maximum Flow Velocity: 2 m/s (water)

• Response Time: t0.5 ≤ 5 s

• Approvals & Standards: MID 2014/32/EU (Module B / Module D), DIN EN 1434, AGFW FW 202, AGFW FW 211

FAQ

Q1: What is the main benefit of direct mounting without an immersion sleeve? A: Direct mounting (Type DL) places the probe in direct contact with the process medium, providing optimum thermal coupling and fast response times (t0.5 ≤ 5 s) without delay caused by extra protective wells.

Q2: Are these temperature probes certified for MID heat meters? A: Yes, the probes fulfill EU Directive 2014/32/EU (MID) requirements and DIN EN 1434, and can be supplied paired and conformity-assessed (Module D identification marking) for deployable heat meter assemblies.

Q3: What RTD resistance values and wiring options are supported? A: The probe supports Pt100, Pt500, or Pt1000 elements in either two-wire or four-wire circuit configurations.

Q4: What is the maximum pressure and temperature limit for this probe? A: The probe is rated for process temperatures from 0 to 180°C and maximum operating pressure up to PS 25.

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