U-GAGE QT50U AC/DC Series—E/M Relay


Long-range programmable ultrasonic sensor with ac/dc voltage and electromechanical relay output

  • Features universal supply voltage: 85 to 264V ac, 50/60 Hz or 48 to 250V dc
  • Offers SPDT electromechanical relay output for setting independent near and far window limits, for applications requiring high and low-limit sensing
  • Available with pump-in and pump-out fill-level control on some models
  • Senses extended range of up to 8 m
  • Features ultrasonic dead-zone of only 2.5% of the total range—75% less than comparable product
  • Features a completely sealed, shock-resistant housing ideal for monitoring levels of liquids as well as solids
  • Available in chemically resistant models with a Teflon coating to protect the transducer
  • Compensates for temperature, for greatest sensing accuracy
  • Simplifies setup with push-button and remote TEACH-mode programming
  • Shows status during setup and operation, using highly visible LEDs indicators

Product Specifications

Supply Voltage and Current85 to 264V ac, 50/60 Hz or 48 to 250V dc (1.5 W max. exclusive of load)
Range200 mm to 8 m
Ultrasonic Frequency75 kHz Rep. rate:96 milliseconds
Supply Protection CircuitryProtected against transient overvoltages
Output ConfigurationSPDT (Single-Pole, Double Throw) electromechanical relay output. One normally open (NO) and one normally closed (NC)
Output RatingMax. switching power (resistive load):2000 VA, 240 W (1000 VA, 120 W for sensors with Micro-style QD)
Max. switching voltage (resistive load):250V ac, 125V dc
Max. switching current (resistive load):8 A @ 250V ac, 8 A @ 30V dc derated to 200 mA @ 125V dc (4 A max. for sensors with Micro-style QD)
Min. voltage and current:5V dc, 10 mA
Mechanical life of relay:50,000,000 operations
Electrical life of relay at full resistive load:100,000 operations
Note:Transient suppression is recommended when switching inductive loads.
Output ProtectionProtected against short circuit conditions
Output Response TimeSelectable 1600, 400 or 100 milliseconds
Delay at Power-up1.5 seconds
Temperature EffectUncompensated:0.2% of distance/° C
Compensated:0.02% of distance/° C
Repeatability1.0 mm
HysteresisWindow limit sensor models:5 mm
Fill-level control sensor models:0 mm
Minimum Window Size20 mm
AdjustmentsSensing window limits:TEACH-Mode programming of near and far window limits may be set using the push buttons.
Sensor Configuration:Output response time and temperature compensation mode may be set using the Speed push button.
Factory default settings: 400 milliseconds output response time and temperature compensation enabled
IndicatorsGreen Power ON LED:indicates power is ON
Red Signal LED:indicates target is within sensing range, and the condition of the received signal
TEACH/Output indicator (bicolor Yellow/Red):indicates output status or TEACH mode
Response indicator (bicolor Yellow/Red:indicates output response time selection
ConstructionTransducer:ceramic/epoxy composite
Membrane switch:polyester
Environmental RatingLeakproof design, rated IEC IP7; NEMA 6P
Connections5-conductor (with drain) 2 m or 9 m shielded PVC-jacketed attached cable, or 5-pin Micro- or Mini-style quick-disconnect fitting. QD cables are ordered separately.
Operating ConditionsTemperature:-20° to +70° C
Relative humidity:100%
Vibration and Mechanical ShockAll models meet Mil. Std. 202F requirements. Method 201A (Vibration: 10 to 60 Hz max. double amplitude 0.06”, maximum acceleration 10G). Also meets IEC 947-5-2 requirements: 30G, 11 milliseconds duration, half-sine wave.
Temperature Warmup DriftLess than 1.0% of sensing distance upon power-up with Temperature Compensation enabled
Application NoteObjects passing inside the specified near limit (200 mm) may produce a false response.


Data Sheets

Document Name Part Number File Size Download
1. U-GAGE QT50U Series, Mounting Flange
116804 Download
2. U-GAGE QT50U Series, Electromechanical Relay Output
(ac/dc models)
117764 Download
3. U-GAGE QT50U, T30U Series, PTFE Flange -- Datasheet 122155 Download

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