HigH Precision sDi-12 Pressure TransmiTTer
sDi-12 or rs485 DigiTal ouTPuT Pressure TransmiTTer
The Preciseline SDI by Keller America provides outstanding Total Error Band (TEB)3 accuracy for reliable, accu-
rate measurements in real-world conditions.
The Preciseline SDI combines two industry standard digital communication protocols, making it ideally suited for
environmental monitoring bubbler applications such as surface water, streams, and reservoirs using existing SDI-
12 monitoring equipment.
The Preciseline SDI is ideal for remote applications where battery-powered operation with minimal current draw
and networking multiple sensors to a data recorder are required. And the included lightning protection makes it
more robust for installation in areas prone to high current and voltage transients.
For more information on the Preciseline SDI, or any other Keller digital product, please contact Keller America.
You may also see the complete line up of Keller products at http://www.kelleramerica.com/datasheets.html.
FEATURES
NSF 61 / NSF 372 approved construction for use in drinking water applications
Standard ±0.1% FS TEB3 or optional USGS OSW accuracies available
- ±0.1% FS TEB3 on ranges up to 900 ft W.C.
- Meets OSW spec on ranges up to 70 ft W.C. from 0...40° C.
16-bit internal digital error correction for cost-effective low Total Error Band (TEB)
Selectable digital outputs (SDI-12 or RS485) for maximum versatility.
RS485 modied-MODBUS and SDI-12 V1.3 protocol compatibility.
316L stainless steel construction.
2-year warranty covers defects in materials and workmanship.
Lightning protection included at no additional cost.
Built in the U.S.A. ARRA Section 1605 Compliant.
Standard 3-day lead time at no additional cost.
Preciseline sDi
0.59 [15]
0.39 [10]
0.865 HEX [22]
Ø 0.825 [24]
Approx. 4.15 [105]
Ø 0.23 [5.8]
KELLER America Inc.
Newport News, Virginia
www.kelleramerica.com
sales@kelleramerica.com
1/4”-18 NPT
Approx. 4.1 [104]
MIL-C 26482
Connection GND SDI-12 +Vcc RS485A RS485B
Cable
1
MIL-C 26482 Pin C Pin B Pin A Pin D Pin F
1.The drain / shield is connected to the transmitter housing. For lightning protection to function
properly, the shield wire must be connected to a good earth ground!
Black White Red Blue Yellow
Edition 03/2019
Subject to alterations
877-253-5537
757-596-6659
Pressure Ranges
2
Relative Innite between 0...5 thru 0...450 PSIG
Absolute Available on request
Proof Pressure 2X Basic Range
2. Pressure range may be specied in units of bar, mbar, mH2O, psi, ftWC, or inWC
Accuracy
3,4
Pressure Standard ±0.1% FS TEB
Optional Opt. ±0.01 ft when reading ≤ 10ftWC
or ±0.1% of reading >10 ftWC
Temperature typ. ± 0.3 °C
3. Total Error Band (TEB) includes the combined effects of non-linearity, hysteresis, and non-repeatability as well as thermal dependencies, over the compensated temperature range.
4. Optional accuracy is written in compliance with USGS OSW specication mandates and limited to a
maximum range of 70 ftWC and a compensated temperature range of 0...40° C.
Output
5
Digital SDI-12 + RS485
Pressure Resolution 0.0005% FS
Temp. Resolution < 0.01 °C
Comm. Protocol SDI-12 V1.3, MODBUS RTU
Baud Rate 1200 bits/s
5. The Preciseline SDI can communicate in either SDI-12 or RS485 at any one time. By default, the
Preciseline SDI will ship in SDI-12 mode. A USB Dongle is required to change to RS485 mode.
Electrical
8
Supply 6...32 VDC
Power Consumption <0.1mA (Sleep)
< 5.5 mA (active)
Startup Time < 5 ms (interface ready)
Load Resistance (mA) <(Supply-6V)/0.0055A
Insulation GND-CASE > 10 MΩ @ 300 V
8. Nominal values may be higher depending upon cable length. Cable resistance (~70Ω / 1000ft) adds
to the supply requirement. In order to insure proper system operation, calculate the minimum required
supply voltage (at the source) as follows:
MINIMUM SUPPLY VOLTAGE = 6 + 0.022 (CABLE LENGTH x 0.07) VDC
Environmental
Protection Rating
Cable IP68
Mil-C 26482 IP65
Operating Temp.
Cable -10...60° C
Mil-C 26482 -30...100° C
Compensated Temp. Standard -10...80° C
Optional 0...40° C
9
Wetted Materials 316 L Stainless Steel
9. Optional compensated temperature range applies to transmitters built to USGS OSW accuracy
specication.
Connection
Process 1/4”-18NPT Male
6
Electrical 10 ft. PE Cable Standard
(Hytrel, Tefzel optional)
MIL-C 26482
6. Other process connections available on request. Consult the factory.
7. Tefzel Cable and MIL-C available at additional cost. MIL-C mating connector included.
7
7
Optional Accessories
1/2” NPT Conduit Fitting Drying Tube Assembly Bellows Assembly Cable Hanger Termination EnclosureInterface Converter (RS485) USB Dongle (SDI-12)
KELLER America Inc.
Newport News, Virginia
www.kelleramerica.com
sales@kelleramerica.com
Certications
CE EN50081-1, EN50082-2
Shock 20g (11ms)
Vibration 20g (5-2KHz, max. amp ±3mm per IEC68-2-6)
NSF / ANSI 61, 372
Edition 03/2019
Subject to alterations
877-253-5537
757-596-6659
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