*mydirectindustry

ALMEMO® Connectors for NTC

Product catalog summary

Introduction
The document provides technical specifications and functionalities of the digital ALMEMO® D6 measuring connector designed for NTC temperature sensors. It highlights the precision and accuracy achieved through integrated A/D conversion and linearization using Galway Steinhart coefficients.

Technical Specifications

Sensor Type: NTC type N
Measuring Input: Electrically interconnected with the power supply (ALMEMO® device ground)
Measuring Ranges: Varies by type
Resolution: Varies by type
Refresh Rate: 0.3 seconds for up to two channels
Accuracy: ±0.05 K at -50 to +100 °C, ±0.02 K at -20 to +65 °C
Nominal Temperature: 23 °C ±2 K
Temperature Drift: 0.004 % / K (40 ppm)
Supply Voltage: From 6 V, provided by ALMEMO® device
Current Consumption: Approximately 4 mA

Key Features

High precision and resolution of 0.001 K across the measuring range of -20 to +65 °C.
Linearization of the NTC characteristic is calculated, not approximated, using Galway Steinhart coefficients.
Increased accuracy through multi-point adjustment during calibration.
Compatible with ALMEMO® V6 and V7 measuring instruments, including ALMEMO® 2490 and ALMEMO® 202-S.
Allows connection of customer-specific NTC sensors after configuration of Steinhart-Hart coefficients via the sensor menu.

Product Variants

NTC, 1 input: -50 to +125 °C, Resolution 0.01 K, Order No. ZAD040FS
NTC, 2 inputs: -50 to +125 °C, Resolution 0.01 K, Order No. ZAD040FS2
NTC, 1 input: -20 to +65 °C, Resolution 0.001 K, Order No. ZAD040FS3

Conclusion
The ALMEMO® D6 measuring connector offers high precision and flexibility for NTC temperature sensors, ensuring accurate measurements across various applications. The document notes that technical changes may be made in the future.

Catalog excerpts

Digital ALMEMO® D6 measuring connector for temperature sensors NTC High levels of precision and resolution 0.001 K across measuring range -20 to +65 °C. Linearization of the NTC characteristic - calculated using Galway Steinhart coefficients. Increased measured value accuracy - thanks to multi-point adjustment of the NTC sensor during calibration. For all ALMEMO® V6 and V7 measuring instruments, including ALMEMO® 2490 and ALMEMO® 202-S. 11/2025 • We reserve the right to make technical changes. Technical data and functions • The digital ALMEMO® D6 measuring connector uses its own integrated A/D converter. Linearization of the NTC characteristic is calculated using the Galway Steinhart coefficients (not an approximation). Across measuring range -20 to +65 °C this produces the very high resolution of 0.001 K. • The digital temperature sensor reaches this high level of precision irrespective of any extension cables used and of any processing in the ALMEMO® display device / data logger. Overall accuracy is determined exclusively by the NTC sensor and the ALMEMO® D6 measuring connector. This increased measured value accuracy is achieved by subjecting the NTC sensor to multi-point adjustment during calibration. With the ALMEMO® D6 measuring plug, customer-specific NTC sensors can be connected to the ALMEMO® system after the corresponding Steinhart-Hart coefficients have been configured via the sensor menu. When using own sensors no additional adjustment of the connector is necessary. Technical data Sensor type Measuring input Measuring ranges Resolution Electrically interconnected with the power supply (ALMEMO® device ground) see variants see variants Refresh rate 0.3 seconds for up to two channels Linearization Calculated Supply voltage from 6 V up, from ALMEMO® device (sensor supply voltage) Current consumption approx. 4 mA Environmental conditions see general technical specifications Type / input NTC, 1 input NTC, 2 inputs NTC, 1 input

Open the catalog to page 1