Aquameta™ CG420-0.5VPU

Glue in pressure transducer for UPVC/CPVC pipe fittings


The CG420 series of 4-20mA pressure transducers are a cost effective and robust solution designed to be glued into UPVC or CPVC pipe fittings using the appropriate solvent cement and methods. It is suitable for use with chemicals such as Sodium Hypochlorite, Sulfuric and Hydrochloric acid. It may be used with other chemicals that are compatible with its wetting materials which are UPVC/CPVC, Viton and Aluminum Oxide. Different choice of seals is available for other chemicals. The CG420-0.5VPU is suitable for pressure application of 0.5 bar. 1 bar options is available. The CG420 series is a fully sealed device that can be submerged. This makes it ideal for use within bunded locations where the possibility exists that the transducer may become submerged. Typically the CG420 series transducer is glued into a flanged fitting that is part of a ball valve, this means that the transducer can be isolated to facilitate installation and maintenance.

Transducer Construction
This state of the art pressure sensor uses a flush Aluminum Oxide Ceramic diaphragm in conjunction with on-board signal conditioning to measure pressures. Pressure and temperature calibration is done electronically with the internal application-specific integrated circuit (ASIC). When pressures and temperatures change, the electronics provide an offset and span correction. It also includes aging detection and compensation. This new method guarantees good precision and long term stability. The sensor is encapsulated in a UPVC body that is filled with an epoxy. The sensor cable is molded into the transducer eliminating problems associated with threaded plugs. This design ensures a very high level of reliability. The outer diameter of the probe is 26.67mm suitable to be glued into ¾” pipe fittings. Venting takes place via the transducer cable.


  • UPVC housing to suit ¾” pipe fittings.
  • 4-20mA output
  • 9 to 30V
  • Temperature compensated
  • Barometric pressure compensation via vented cable
  • High linearity and low hysteresis values
  • EMI Certified
  • Excellent resistance to corrosion and abrasion
  • Automated offset and span correction
  • Age compensation
  • Spigot flange to protect pressure sensing surface from run off glue
  • Rounded front shoulder to prevent glue being scraped off the fitting as the transducer is inserted
  • Compact unit, suitable for use in confined spaces

Output Signals
The CG420 transducer uses a two wire 4-20mA output signal. The signal is linear with pressure. The sensor will operate with a supply voltage that can range from 9V to 30V DC. The Aquameta Junction box may be used to extend the transducer cable with any other cable. The vented junction box has a Gortex covered opening that allows venting to atmosphere to take place whilst restricting the ingress of moisture.

Housing: U = UPVC, C= CPVC
Cable: P=PVC, F=FEP
Seals: V=Viton, N=Nitrile, K=Kalrez, E= EPDM
Pressure: 0.5, 1, 10 bar