Type |
N/A AcraSensor Level Transmitter |
Series |
N/A 450 |
Mounting Application |
N/A Short mount (single wall, non-insulated tank) Use with weld-in shell 1777-2 or to fit 2" sanitary clamp fitting adapter |
Output/Connections |
N/A Electronic (4-20 mA), 1/4 in. Tube Swagelok |
Wetted Material |
N/A
Silicone rubber O-ring (certified to 3-A 18-03) Titanium diaphragm, commercially pure (certified to 3-A 74-06). Optional diaphragm materials: Silicone rubber Fittings/adapter wetted surfaces are typically 316L Stainless Steel (as supplied by KING-GAGE®). |
Air Consumption |
N/A Total air consumption of sensor package (including sensor control) is less than 10 ft³/h or 0.16 scfm. |
Voltage Supply Requirements |
N/A 14 Vdc to 40 Vdc (Unregulated) to Power Signal Loop Using 868 D/P Sensor Control. |
Pressure Range |
N/A Pneumatic, Includes SafeGard Option (25 to 650 in. Range) |
Note for Pressure Range |
N/A Sensor is a 1:1 pneumatic force balance diaphragm capable of repeating hydrostatic pressure as an equivalent pneumatic output. Functional pressure limit is 130 psi (or 3,598 inches at 1.00 specific gravity) determined by supply pressure (35 to 150 psi) less 20 psi. |
Sensitivity |
N/A Less than 0.001 psi (± 0.02 inH2O/ 0.508 mmH2O) |
Repeatability |
N/A Better than ± 0.002 psi (± 0.05 inH2O /1.27 mmH2O) |
Note for Span Adjustment Range |
N/A IMPORTANT! Accuracy, linearity, and non-repeatability values are based on nominal range. |
Operating Limit (Maximum Pressure) |
N/A Pressure above 300% nominal range (over range) will result in damage to the transmitter (200% may cause a shift in calibration). Burst pressure is 200 psi and will cause catastrophic and physical failure of the pressure element. |
Accuracy |
N/A ± 0.007 psi (± 0.2 inH2O/0.508 mmH2O) |
Depth Measurement [Max] |
N/A 1,937 inH2O49.0 mH2O |
Transmitter Signal Loop |
N/A As is typical of two wire transmitters, electrical power to the signal loop is supplied through twisted pair cable. Excitation voltage (+V) is provided by the receiving device or from a separate Vdc power supply installed in the loop. The actual voltage necessary for operation of the system will depend upon the overall load resistance of the loop. In most applications, the KING-GAGE® Digital Indicator or LevelBAR indicator provide 24 Vdc excitation to power the transmitter signal loop. |
Operating Temperature [Min] |
N/A 0 ºC30 ºF |
Operating Temperature [Max] |
N/A 149 ºC300 ºF |
Pneumatic Operation |
N/A
AcraSensor diaphragm unit is paired with a Sensor Control regulator to provide the continuous 1 CFH (cubic foot per hour) air flow to the underside of the diaphragm to attain pneumatic balance pressure. Constant back pressure regulation maintains a linear 1:1 response throughout the entire operating range to ensure pneumatic pressure is directly equivalent to the hydrostatic head of liquid in the tank. The AcraSensor + 860 Sensor Control combination affords rugged durability and simple maintenance. Used in conjunction with compatible indicators (such as the KING-GAGE® LevelBAR), this liquid level sensor can provide reliable operation in even the most challenging environments. Alternative configurations include substitution of a molded silicone rubber diaphragm when appropriate. |
Compressed Air Supply |
N/A Operation of the AcraSensor requires a compressed air/gas source providing supply pressure of 35-150 psig (2.4-10.3 bar). Pneumatic components require instrumentation-grade compressed air that is clean, dry and oil-free to ensure trouble free performance. |
Application |
N/A
|
Tank Gauging Applications |
N/A
Acting on the force balance principle, a pneumatic sensor generates air pressure equivalent to the hydrostatic force created by liquid depth. This pneumatic pressure is directed into the D/P transmitter. Pressure is converted to an electronic 4-20 mAdc output proportional to liquid depth. Twisted pair cabling is used to form the signal loop through which the remote indicator receives the transmitter output. The KING-GAGE® indicators shown in these system views correlate the transmitter output to total volume or weight of tank contents. This is determined by using a pressure versus capacity listing corresponding to the actual tank dimensions. The standard AcraSensor + 868 D/P Sensor Control combination combines accuracy, rugged durability, reduced maintenance and long term stability for liquid level tank gauging. Its integral transmitter converts the pneumatic isolation pressure to a proportional 4-20 mAdc signal suitable for process control or remote level indication. |
Service and Replacement Parts |
N/A
7333-10: Replacement filter element 7334-2: SafeGard service kit 7334-9: Air control section kit 7879-20: Vent generator 9316-4: O-ring for D/P top plate (868) |
Flush Weld Shells and Retrofit Adapters |
N/A Polished stainless steel tank mounting is offered in two lengths for insulated wall vessels and a short version for single wall (non-insulated) tanks. We offer adapter inserts that permit retrofit installation of the AcraSensor unit within an existing sanitary mounting from other manufacturers (e.g., Tank Mate, Cherry Burrell, Anderson Instrument). There is also an adapter for 2" Tri-Clamp quick release fittings available for direct mounting of the AcraSensor unit. |
860 Series Sensor Control |
N/A
|
868 Series Differential Pressure Sensor Control |
N/A
|
3-Tube Cable (Replacement or Non-Standard Lengths) |
N/A
Use for interconnection between AcraSensor and Sensor Control 1766-15: Cable, 15 ft (4.5 m) total length, trimmed 8014-X: Cable quantity discount, minimum purchase 50 feet, X = Total Length |
Acrasensor Replacement/Service Parts |
N/A
1751: Clamp Nut, 304 SS 1752-22-3: Acrasensor Connector Assembly (old) 1752-30-3: Acrasensor Connector Assembly (new) 6554-40: O-Ring, Silicone Rubber (Standard) 1747-40: O-Ring, Fluorocarbon (FKM) (Special Application) Consult Factory 1786-40: O-ring, PTFE (Special Application) Consult Factory 6554-44: O-Ring, Oversized (Special Application) Consult Factory 5611-21: Acrasensor Housing (Short) 5611-22: Acrasensor Housing (Standard) 5611-23: Acrasensor Housing (Long) 7859-1: Post Assembly Short 7859-2: Post Assembly Standard 7859-3: Post Assembly Long 7899-3: Body (For Rubber Diaphragm) |
AcraSensor Diaphragms |
N/A
7904-1: AS Titanium Diaphragm Assembly with Silicone O-Ring S-1618-3: AS Titanium Diaphragm Assembly with PTFE O-Ring 6448-12-5: Silicone (White Rubber) Diaphragm 2-Pack (Rubber Diaphragm is Used with 7899-3 Body) |
Diaphragm Sensing Units |
N/A
Acrasensor (Titanium with Silicone Rubber O-Ring) 8999-1-4: Short Length, Titanium Diaphragm 8999-2-4: Standard Length, Titanium Diaphragm 8999-3-4: Long Length, Titanium Diaphragm Acrasensor (Titanium Diaphragm with PTFE O-Ring) 8999-1-5: Short Length, S-1618-3 Diaphragm 8999-2-5: Standard Length, S-1618-3 Diaphragm 8999-3-5: Long Length, S-1618-3 Diaphragm Standard Length - Use with 1777 weld-in shell for single wall or insulated wall (up to 4.5" thick; also fits adaptors for non-KING-GAGE® "short" shells. Long Length - Use with1777-3 weld-in shell for Crepaco silo or other thicker wall (up to 6.75") vessels; also fits adapters for non-KING-GAGE® standard (insulated wall) shells. Short Length - For single wall (non-insulated) tanks; fits KING-GAGE® short shell. Note: Laser-fused Titanium Diaphragm units are generally recommended for both sanitary and industrial applications. |
Differential Pressure Capsule Replacement |
N/A
Replacement D/P capsule (sensor/transmitter assembly) for Model 868 D/P Sensor Controls. Signal input connection is 1/4 NPT - part numbers below do not include fitting. S-1565-1-5-1: D/P Replacement Capsule Kit (0-2 psid) S-1565-1-0-1: D/P Replacement Capsule Kit (0-5 psid) S-1565-1-1-1: D/P Replacement Capsule Kit (0-10 psid) S-1565-1-2-1: D/P Replacement Capsule Kit (0-15 psid) S-1565-1-3-1: D/P Replacement Capsule Kit (0-30 psid) S-1565-1-4-1: D/P Replacement Capsule Kit (0-50 psid) |
Reliable Liquid Level Measurement |
N/A
These unique pneumatic sensors detect level by sensing hydrostatic pressure created by liquid depth. Acting on the force balance principle, a sensitive diaphragm is exposed to the liquid contents of the tank. Compressed air within the sensor creates a pneumatic pressure that balances the force of the liquid acting against the diaphragm. This compensating pneumatic pressure is directly proportional to the depth of liquid in the tank. The pneumatic force balance technique is virtually free from long term drift, hysteresis and temperature sensitivity unlike strain measurements (including load cells) since mechanical deflection of the diaphragm is not directly measured. The compensating pneumatic balance pressure which effectively isolates the sensor is converted to a proportional 4-20 mAdc signal or can be directly output to a suitable gauge. In actuality, the sensor is measuring the mass (weight) of fluid matter that can be correlated to units of standardized volume. |
Sanitary Configurations |
N/A
These sensors are especially suited to a wide range of sanitary applications on storage or continuous processing vessels. The unique AcraSensor titanium diaphragm satisfies the 3-A Sanitary Standard and is appropriate for flush mount, clean-in-place installation. An FDA-approved silicone rubber O-ring seal forms a crevice-free, positive compression seal between the diaphragm probe and mounting shell. Flush weld mountings are available with product contact surfaces of 316L stainless. The level sensor can be alternatively supplied with silicone rubber diaphragm surface. This molded elastomer provides additional material compatibility options. (Quick disconnect sanitary adapters are also available for sensor mounting.) |
Conformance to Sanitary Standard |
N/A The AcraSensor diaphragm is authorized to carry the 3-A symbol and conforms to 3-A Sanitary Standards 74-06, Sensors and Sensor Fittings and Connections. |
Installation Options |
N/A For sanitary flush mount installation, shell is installed through the side of the tank and flush-welded to inner liner. AcraSensor uses a one-piece titanium diaphragm mounted onto a post assembly inserted into the tank shell and clamped into place. |
Additional Information |
N/A
Meets current standards for 3A
|
Product Warranty |
N/A
All KING-GAGE®, a NOSHOK Company products are guaranteed to be free from defects in material and workmanship for one (1) year from the date of purchase. Repair Services Warranty: 90 days limited warranty. |
Prop 65 Warnings |
N/A
 WARNING: This product can expose you to chemicals including Lead and Nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov |
Note |
N/A AcraSensor packages listed include diaphragm sensing unit, 860 Series Sensor Control or 868 Series D/P Purge Control, Swagelok or PolyFlo fittings, and bundled 3-tube airline cable. |
Application Notes |
N/A Location of the Sensor Control air flow regulator should be generally no greater than 50 feet (15 m) from the AcraSensor unit. The level sensor includes 15 feet (4.5 m) of bundled 3-tube cable for the pneumatic interconnections with the Sensor Control. Distances greater than 50 feet may increase response time of the sensor to changes in liquid level in the tank. |
