060G2103 Danfoss AKS 33 Pressure Transmitter

Product Overview

The 060G2103 (060G2103) is a high-precision AKS 33 pressure transmitter specifically engineered for refrigeration and air conditioning applications. Part of the renowned Danfoss sensors group, this current-output transmitter converts measured pressure into a standard 4-20 mA signal, ensuring reliable data transmission over long distances with high immunity to electrical noise. The AKS 33 is designed to withstand the harsh conditions of industrial cooling systems, featuring a robust construction that handles extreme medium temperatures ranging from -40 to 85 deg C. Its sealed gauge reference and high overload pressure capacity make it a critical component for monitoring suction and discharge pressures in commercial refrigeration racks, chillers, and heat pump systems.

Technical Configuration

The AKS 33 utilizes a proven piezo-resistive sensing element and advanced electronics to deliver superior accuracy within its compensated temperature range (0 to 80 deg C). This ensures that thermal shifts do not compromise the integrity of the pressure readings. The electrical interface follows the EN 175301-803-A standard (Large B DIN connector), providing a secure, vibration-resistant angular connection with an IP65 protection rating. The transmitter is designed as a "sealed gauge" unit, meaning it is calibrated against a fixed internal reference pressure, making it immune to fluctuations in atmospheric pressure—a vital feature for systems operating in varying altitudes or weather conditions.

Technical Specifications

Technical FAQs

Does the 060G2103 require a specific polarity for the 4-20 mA loop?

Yes. As a current-output transmitter, it operates on a 2-wire loop. Ensure the positive supply is connected to Terminal 1 and the signal return/ground is on Terminal 2 of the EN 175301-803-A connector to prevent circuit malfunction.

What is the benefit of the "Sealed Gauge" reference in refrigeration?

A sealed gauge reference protects the internal sensor electronics from moisture and atmospheric humidity. This is particularly important in refrigeration where condensation is common, as it prevents "breathing" issues that can lead to internal corrosion or signal drift.

Can this sensor be used with ammonia (R717) refrigerants?

While the AKS 33 is compatible with most halogenated refrigerants (CFC, HCFC, HFC), for ammonia applications, Danfoss typically recommends the AKS 32R or specialized versions with stainless steel components. Verify material compatibility if using non-standard synthetic oils or natural refrigerants.

Engineering & Installation Guide

Moisture Protection and Orientation: To maintain the IP65 rating over the long term, always install the transmitter with the angular connector pointing downwards. This prevents moisture from pooling at the cable entry and migrating into the connector pins via capillary action. Use a "drip loop" in the cable for additional safety in wash-down or high-humidity areas.

Pressure Pulsation Damping: In systems with high-frequency pressure pulsations (such as those near reciprocating compressors), it is highly recommended to install the transmitter behind a capillary tube or a damping orifice. Direct exposure to intense pulsations can cause fatigue in the piezo-resistive diaphragm, leading to premature sensor failure or offset shifts.

Wiring and Signal Integrity: Use shielded twisted-pair cabling for the 4-20 mA loop, especially in environments with high VFD (Variable Frequency Drive) noise. Connect the shield to the controller's ground terminal only. Ensure the supply voltage is stable (typically 9-32 VDC) and account for the voltage drop across the total loop resistance to ensure the transmitter has at least 9V available at its terminals during a 20 mA peak.