User guide

TM
American Sensor Technologies • 450 Clark Dr., Mt. Olive, NJ 07828 • phone [phone] • fax [phone] • email: [e-mail]
* Accuracy includes non-linearity, hysteresis & non-repeatability
Liquid Level Control including Bubbler 
systems
Climate Control

Energy Management 
Air-fuel Ratio including Measurement for 
Furnaces
Vapor Recovery

Leak Detection 
Air or liquid Filtration 
Flow Measurement 
Applications
Electrical Data
Output
4-20mA 0-5V Three Wire
Excitation 10-28VDC 10-28VDC
Output Change with Input Voltage Change
- <0.1% from 10 to 32 VDC
Current Consumption: - < 10mA
Bandwidth 5Hz 5Hz
Output Noise: < 0.0035mA, RMS < 1mV, RMS
Zero Offset: < ± 1% FS < ± 1% FS
Span Tolerance: < ± 1.5% FS < ± 1.5% FS
Output Load: 0-800 Ohms@10-28 VDC 5k Ohms, min.
Reverse Polarity Yes Yes
Performance @ 25°C (77°F)
Accuracy <±1.0% of FS
Stability (1 year) ±0.5%FS, typ
Burst Pressure 2000 PSI
Pressure Cycles >100,000 Cycles
Environmental Data
Temperature
Operating -40 to 80°C (-40 to 176°F )
Storage -40 to 100°C (-40 to 212°F)
Thermal Limits
Compensated Range 0 to 55°C (32 to 131°F)
TC Zero <±1.5% of FS
TC Span <±1.5% of FS
Benefits
Accurate Low Pressure Measurement 
Excellent Repeatability 
Wide Range of Liquids and Gases  including: Water, Natural Gas,
Hydrocarbon Fuels, Air and Non-Corrosive Gases
The AST5100 Wet - Wet Differential Pressure transmitter is your accurate pressure
sensing device for low differential pressure. With a differential pressure range as
low as 0 to 5” water column (12.5mbar), this product can be used to measure ow
across an orice, differential across a lter, tank level, or gauge pressure. Using
LVDT technology and AST’s advanced electronics, the AST5100 delivers accurate,
repeatable measurements.
AST5100
Low Pressure Differential Transmitter
Wetted Materials
Nickel Alloy 52, Ni-Span C, Viton, 304 Stainless Steel, 
Aluminum 6061, RoHS Solder, Loctite 680 (meets NSF61)
Installation Guidelines
The AST5100 must be mounted on a at surface within ± 15° to the ideal 0° plane to
maintain specications. Do not Overtighten the pressure connections or insert any ob-
jects in P1 or P2 to avoid damaging the sensing element. When using isolation valves,
both should be mounted close to the sensor. For liquid level and wet applications,
install bleed screw adapters close to P1 and P2 so that trapped air can be purged if
needed. For optimum performance, always make sure pressure is equalized within the
pressure range chart ranges. The AST5100 has asymmetric protection on P1 and P2.