UE One Series Hybrid Smart Solid State Transmitter-Switches

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Programmable solid state pressure, differential pressure, and temperature devices with local indication for general service, hazardous area, or harsh environment applications. 4-20 mA transmitter-only, switch-only, or hybrid transmitter-switch models, front-panel digital process display and keypad adjustment, adjustable differential, I Am Working self-diagnostics, NEMA 4X/IP66 epoxy-coated aluminum alloy 360 enclosure with tempered glass window, UL listed, CSA approved, cUL certified, CE compliant.

United Electric's One Series provides explosion-, flame-proof, intrinsically safe, and non-incendive devices to monitor gauge pressure, differential pressure, or temperature for critical alarm and shutdown applications in general service or harsh, hazardous environments. With a digital process display and available 4-20 mA output, the One Series can provide the functions of a switch, a gauge, and a transmitter with only one connection to the process.

UE One Series is available in two-wire analog loop powered, two-wire discrete input powered, and externally powered solid state switch models, and as switch-only, transmitter-only, or transmitter/switch versions. Transmitter and hybrid transmitter-switch One Series now feature HART® communications so you can program or troubleshoot without removing the enclosure cover to maintain device integrity, even in explosive environments.

Field-proven in thousands of applications like pumps and compressors, lubricating oil monitoring, hydraulic oil pressure, filter monitoring, and plant upgrades as drop-in replacements for mechanical switches.

  • Switch only, transmitter only, or hybrid transmitter/switch models available
  • Two switch-only models available: High voltage, low current for compatibility to worldwide DCS and PLC systems, and high voltage, high current for switching high level loads directly at the measurement point
  • Solid state switch-only models replace mechanical switches for cost-effective upgrades using existing wiring
  • NAMUR standard and HART® enabled transmitter; 4-20 mA output plus programmable switch for process monitoring, alarm, and shutdown
  • Adjustable Ranges: Pressure -14.7 to 6000 PSI, Temperature -40° to 1000°F, Differential Pressure 0 to 200 PSID
  • Configurable "I Am Working" self-diagnostics ensure the instrument is functioning properly
  • Display and keypad provide easy, fast, secure field programming without taking the device out of service
  • Programmable setpoint and deadband provide versatile, accurate, repeatable alarm and shutdown switching without "wet" calibrations on a pressure test stand
  • All models UL, CSA approved for Class I Div 1, Class II Div 1, Class III, plus Class 2 Zone 1, and Class 1 Zone 2 environments

Model Selection Guide

Use this table to find the right model for your application. Looking for other ranges or configurations? Don't see the option you need? Call a Lesman sales specialist at 800-953-7626.

Description Catalog
One Series Intrinsically Safe, Flameproof, and Non-Incendive Electronic Transmitter/Switch
Discrete input powered two-wire switch, 7.8-50 VDC @ 0.1A
Discrete input powered two-wire switch, 70-240 VAC/VDC @0.1A
External powered four-wire switch, 70-240 VAC/VDC @0.15-10A
Loop-powered HART transmitter, two programmable relays, 0-280 VAC/VDC @ 0.3 A
Loop-powered HART transmitter

Sensor Type and Range Selection
Pressure Sensor, 316L Stainless Steel, Welded Diaphragm, 1/2" NPTF
Differential Pressure Sensor, 316L Stainless Steel, Welded Diaphragm, 1/4" NPTM
Temperature Sensor, 100Ω RTD, 316SS Sheath, 0.25" OD


Range Max. Overrange  
-14.7 to 30 PSI
-14.7 to 100 PSI
0-5 PSI
0-15 PSI
0-30 PSI
0-50 PSI
0-100 PSI
0-300 PSI
0-500 PSI
0-1000 PSI
0-3000 PSI
0-4500 PSI
0-6000 PSI
60 PSI
200 PSI
10 PSI
30 PSI
60 PSI
100 PSI
200 PSI
600 PSI
1000 PSI
2000 PSI
6000 PSI
9000 PSI
12000 PSI
-_ 06
-_ 08
-_ 10
-_ 11
-_ 12
-_ 13
-_ 14
-_ 15
-_ 16
-_ 17
-_ 18
-_ 19
-_ 20

0-5 PSID
0-50 PSID
0-100 PSID
0-200 PSID
100 PSID
200 PSID
400 PSID
-_ 10
-_ 11
-_ 12
-_ 13

Temperature Range and Configuration
Stem-Mount Sensor
-40° to 450°F, 4" probe length
-40° to 450°F, 6" probe length
-40° to 450°F, 10" probe length
-_ L1
-_ L2
-_ L3

Remote Sensor
Fixed Cable Length
-300° to 200°F, 2.5" probe length, 6' MI cable
-40° to 450°F, 6" probe length, 6' Teflon® cable
-40° to 1000°F, 2.5" probe length, 6' MI cable
-_ C1
-_ R1
-_ H1

Remote Sensor
Custom Cable Length
(Specify When Ordering)
-300° to 200°F, 2.5" probe length, up to 30' MI extension cable
-40° to 450°F 6" probe length, up to 30' Teflon® extension cable
-40° to 1000°F, 2.5" probe length, up to 30' MI extension cable
-_ CC
-_ RC
-_ HC

Lesman Instrument Company on YouTube

Video is a great way to learn about instruments and technology, and it's available whenever you need it. Watch step-by-step instructions on how to configure a transmitter, tune a controller, or troubleshoot a safety valve. We'll post videos we create, and those our manufacturer partners share with us, so you don't have to look in multiple places to find the video training you need.

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More Information
Measured Variable Differential Pressure, Gauge Pressure, Temperature
Enclosure/Construction NEMA 4X, Div 1 Hazardous, Div 2 Hazardous
Switch Output SPST, MOSFET/SSR, 4-20 mA, HART
Sensor Type RTD, Strain Gage
Adjustment External Adjustment
Measuring Range -14.7 to 6000 PSIG, 0 to 200 PSID, -40° to 1000° F

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