Stevens - Model SDX -Pressure Transducer
The Stevens SDX (Submersible Depth Transmitter) is a pressure sensor that provides accurate measurement results while offering an affordable solution suitable for various level measurement applications. Its high-impact, corrosion-resistant PVC Type II housing and potted electronics ensure durability in most water and challenging fluid environments. The copper tip is designed to reduce algae growth. The SDX is also an ideal option for level measurement applications where more expensive sensors may be at greater risk of damage. The device includes specified vented cable lengths, with the vent serving as an atmospheric reference for the sensor, which is essential for maintaining optimal measurement accuracy. The PVC housing features integrated pipe threads for secure installation into pipes, tanks, or other relevant applications.The SDX comes equipped with user specified vented cable lengths. The vent provides an atmospheric reference for the sensor, which is necessary for ensuring the highest possible accuracy when making a level measurement.
The SDX features one 4-20 mA analog output signal that corresponds linearly to range. Compatible with existing power and data logging instruments, the SDX can easily be deployed for data collection at remote monitoring sites.
The sensor housing integrates pipe threads for securely mounting the SDX into pipes, tanks, or other applications.
- Rugged housing and fully potted electronics—not damaged by freezing water
- Compact size
- Accuracy of ± 0.25% full span
- Analog output (4-20 mA)
- Vented cable, 2 wire, with drain
- Weighted copper nose cone
The SDX is a “Wet-Wet” device. While it is important to keep the SDX cable’s vent tube unobstructed for barometric pressure compensation, neither the pressure transducer nor internal electronics are damaged by condensation or moisture entering the vent tube. For best results, Stevens recommends the desiccant cartridge with vent tube adapter.
- Power requirements : 9 - 26 VDC
- Output : 4-20 mA current signal, linearly corresponding to range
- Operating temperature : -40° F to 185° F (-40° C to 85° C)
- Compensated temperature : 32° F to 122° F (0° C to 50° C)
- Linearity :
- 0-2.5 ft range: 0.2% max.
- 0-5 ft range: 0.2% max.
- 0-10 ft range: 0.2% max.
- 0-35 ft range: 0.3% max.
- 0-50 ft range: 0.3% max.
- (0.1% typical for all ranges)
- Repeatability & hysteresis : Typical: ± 0.2% span
- Reverse polarity protection : Built into sensor
- Overpressure :
- 0-2.5 ft: 20 psi max.
- 0-5 ft: 20 psi max.
- 0-10 ft: 20 psi max.
- 0-35 ft: 45 psi max.
- 0-50 ft: 45 psi max.
- Shock : Qualification tested to 150 g
- Wiring :
- Red: power
- Green: 4-20 mA return
- Silver: drain wire
- Pipe threading :
- 1/2-14 straight pipe thread (back of sensor housing near cable)
- 3/8-18 straight pipe thread (under removable copper nose-cone)
- Physical size : 4.00" L x 0.84" dia. (101.6 mm L x 21.33 mm dia.)
- Weight :
- Probe: 2.37 oz (61.19 g)
- Cable: 0.43 oz (12.19 g) per foot (.4 g per cm) (weights are approximate)