American Sensor Technologies

AST4600 and AST46HA Series explosionproof pressure transmitters
The AST4600 and AST46HA Series explosionproof pressure transmitters are now available in new materials and with new pressure ranges and options. The expanded pressure range of 0–2.5 psi to 20,000 psi addresses the need for high- pressure transmitters capable of withstanding cycling; a vented gauge reference allows for use at low pressures. A failure-mode indicator option provides better system control in the event of sensor failure. F250C female process ports allow robust high-pressure connections. Construction of Waspalloy (a nickel-based alloy) makes the transmitters suitable for use in the processing of heavy oil and high sulfidation. Class 1, Div. 1, Groups A, B, C, and D approvals for the AST46HA allow the transmitter to be used in acetylene and hydrogen environments. Sealed gauge versions are approved for Class 2, Div. 1 Groups A, B, C, and D mining applications.

AST47HP Series Sensors
 The AST47HP Series meets the growing need for pressure sensors with ratings to 60,000 psig (4,000 bar) for applications such as high-pressure wells, hydraulics, injection molding equipment, water jets and downhole instrumentation. These sensors are also suitable for water-jetting applications used in food processing, concrete and tile cutting and metal fabrication. They incorporate a one-piece stainless-steel sensing element that is free of silicone oil, welds or O-rings. The absence of these characteristics eliminates the chance of contamination from outside media, particularly in food processing applications. The sensing element features a thick diaphragm that eliminates the long-term drift associated with high-pressure and high-cycle applications. Stainless steel housing is welded to the sensing element for optimum protection of the sensor’s electronics. Units are rated for over 100-million pressure cycles and operation over a temperature range of –40 to 85°C (–40 to 185°F).

Model 5000 Wet/Wet Differential Pressure Sensor
When installed within a water filtration system, the Model 5000 Wet/Wet Differential Pressure Sensor is designed to detect the difference between the upstream pressure driving water through the filter and the downstream pressure. After reading a significant drop in pressure, the sensor can notify the system that the filter is clogged or needs replacing. In addition to featuring highly accurate differential pressure output, the Model 5000 is constructed of type 316L stainless steel wetted materials that resist hydrogen embrittlement to ensure the highest reliability in a variety of media. This design provides excellent overrange and burst protection (five times the rated line pressure or 2,000 psi, whichever is less) for system safety in the most extreme conditions. The Model 5000 does not contain internal O-rings or fluid-filled cavities, eliminating the chance of outside media permeation or system contamination from silicone oil. Voltage and current outputs are available over a wide operating temperature range of –40°F to 185°F. Accuracy specifications are < 0.3% best fit straight line (bfsl), including non-linearity, hysteresis and non-repeatability.

AST4900 pressure sensor
The AST4900 is a competitively priced, high-quality pressure sensor suitable for measuring gases and liquids in high-purity applications. These stainless steel sensors are free of oil-fill, welds and internal O-rings, which eliminates the risk of system contamination in extreme conditions. The sensors are available with two standard fittings: 0.25-in. NPT male and 0.25-in. VCR male. Each sensing element is machined from 316L stainless steel and is electropolished to remove contaminants. The one-piece design can also be manufactured using Inconel 718, a nickel alloy with a wide range of chemical compatibility. The AST4900 can be scaled for pressure ranges of 0–25 psi to 0–10,000 psi. Built to operate in temperatures that range from –40°F to 185°F, this model’s standard performance is rated to 0.25% best-fit straight line (BFSL). Moreover, the AST4900 carries 2X over-range and 5X burst pressure protection, and is built to withstand more than 100 million pressure cycles.

AST4520 submersible pressure sensor
The AST4520 is a media-isolated, submersible pressure sensor with an all-stainless-steel construction that is approved to Underwriters Laboratories / Canadian Underwriters Laboratory (UL/cUL) 913 Class 1, Division 1 IS, Groups C and D, when used with an approved barrier. It is a cost-effective solution for monitoring the level of viscous media in turbulent tanks. Its flush-diaphram steel-cage design allows for proper media flow while keeping the sensor at the bottom of the tank or well. It is suitable for many submersible and level measurement applications, including wastewater and stormwater systems, industrial lift stations, and holding tanks. Units operate over a temperature range of –40º to 85ºC and have pressure ranges of 0–5 psig to 0–15 psig. They come standard with ±0.25% best-fit-straight-line (BFSL) accuracy, electromagnetic interference and radio frequency interference (EMI/RFI) protection of 100 V/m, and a 4–20-mA output.