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          Active / Available from OEM
          Apter Power supplies verified Bently Nevada 3500 Series hardware to ensure reliable thermal monitoring, protect critical rotating equipment, and prevent unexpected plant downtime.

        3500/61 133811-02

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        The 3500/61 133811-02 is a Bently Nevada 3500/61 temperature monitor with six channels, recorder outputs, accepting RTD or TC inputs, and programmable alarm setpoints for machinery protection.
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
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        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for 3500/61 133811-02

        • Manufacturer:
          Bently Nevada
        • Part Number:
          3500/61 133811-02
        • Product Family:
          3500 System
        • Product Type:
          Temperature Monitor
        • Stock:
          1
        • Input Impedance:
          10 MΩ per lead
        • Power Consumption:
          9 W nominal
        • RTD Excitation Current:
          925 ±15 μA @ 25°C
        • Recorder Outputs:
          4-20 mA per channel (0-600 Ω load, 0-12V compliance)
        • Recorder Resolution:
          0.3662 μA/bit ±0.15% error at 25°C
        • Accuracy (RTD/TC, typical):
          ±1°C to ±3°C (depending on I/O type)
        • Operating Temperature:
          -30°C to +65°C (with external termination)
        • Storage Temperature:
          -40°C to +85°C
        • Functional Safety:
          SIL 2
        • Weight:
          0.98 kg
        • Estimated shipping dimensions:
          2.5x18.5x24.2cm
        • Tariff Code:
          8537101190
        • Country of origin:
          USA
        • Place of shipment:
          Xiamen, Fujian, China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Specifications Application Operating Environment Monitoring & Control

        Features:

        • Accepts RTD (Pt100, Ni120, Cu10) and thermocouple (J, K, T, E) inputs; supports 3‑wire or 4‑wire RTDs; each channel individually configurable.
        • Six isolated 4-20 mA outputs proportional to full‑scale temperature; 0.3662 μA/bit resolution; short‑circuit protected; update rate ≤100 ms.
        • Alert and Danger setpoints adjustable 0-100% of full scale; programmable delays (1‑60 seconds); accuracy ±0.13%; functional safety certified (SIL 2).
        The 3500/61 133811-02 provides six channels of temperature measurement, each independently configurable for RTD or thermocouple input. This allows a single monitor to handle mixed sensor types – for example, three RTDs for bearing temperatures and three thermocouples for exhaust gas temperatures. Supported RTDs include the industry‑standard 100Ω platinum (alpha = 0.00385 or 0.00392), 120Ω nickel, and 10Ω copper. Supported thermocouples are types J, K, T, and E. For RTDs, both 3‑wire and 4‑wire connections are supported

        The 3500/61 133811-02 differs from the 3500/60 by providing dedicated 4-20 mA recorder outputs for each of its six channels. These analog outputs are proportional to the monitor’s full‑scale temperature range and are used to interface with plant DCS, PLC, or SCADA systems for trending, logging, and control. For example, a bearing temperature of 0-150°C might be mapped to 4-20 mA, allowing the DCS to continuously track temperature rise and initiate pre‑alarms before the monitor’s alert setpoint is reached.

        The 3500/61 133811-02 is not just a data acquisition device – it is a machinery protection monitor. It continuously compares each channel’s temperature against user‑programmable Alert and Danger setpoints. When a setpoint is exceeded, the monitor activates alarms, which can be used to alert operators, trigger shutdowns, or log events. Alarm setpoints are adjustable from 0 to 100% of the channel’s full‑scale range, with accuracy within 0.13% of the desired value.

        The 3500/61 133811-02 Bently Nevada Temperature Monitor may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL)by the manufacturer (OEM).
        Bently Nevada 3500/61 133811-02 Temperature Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        Bently Nevada 3500/61 133811-02 Temperature Monitor Specs

        General

        • Manufacturer Bently Nevada
        • Model 3500/61 133811-02
        • Condition New Original ready stock
        • Product Family 3500/60 133811-01,3500/61 133811-03,3500/61 133811-04
        Important Notice:Other accessories,manuals,cables,calibration data,software,etc.are not included with this equipment unless listed in the above stock item description.All prices are shown in USD.
        • Bearing Temperature Monitoring: Monitors radial and thrust bearings in turbines, pumps, and compressors to detect early signs of mechanical wear or lubrication failure.
        • Stator Winding Protection: Essential for large electric motors and generators to prevent insulation damage caused by electrical overloads or cooling system malfunctions.
        • Exhaust & Fluid Monitoring: Tracks exhaust gas temperatures (EGT) in gas turbines and lube oil/coolant temperatures in auxiliary systems.
        • Industrial Sectors: Widely used in Power Generation, Oil & Gas Refineries, Chemical Processing, and Water Treatment plants.
        • Humidity: Up to 95% non-condensing, providing resilience in humid coastal or tropical plant locations.
        • Electromagnetic Compatibility (EMC): Built to withstand high-interference environments near high-voltage switchgear and large motor drives, adhering to CE and CSA standards.
        • Hazardous Areas: When used with appropriate barriers or in North American/ATEX-certified racks, it is suitable for use in Class 1, Division 2 or Zone 2 environments.
        • High-Resolution Monitoring: Continuously digitizes analog temperature signals, allowing operators to see real-time trends via the System 1 software or local HMI.
        • Setpoint Control (Alert/Danger): Users program specific temperature thresholds. When reached, the module sends signals to the 3500 Relay Modules to initiate alarms or emergency machine shutdowns (trips).
        • Output Connectivity:Digital: Sends data via the 3500/22M TDI module to higher-level DCS or SCADA systems.
        • Condition Monitoring: Beyond simple alarms, it provides "Not OK" status monitoring, identifying if a sensor has failed rather than triggering a false machine trip.
        Description
        The 3500/61 133811-02 is a six-channel temperature monitor for the Bently Nevada 3500 series machinery protection system. It accepts both RTD (Resistance Temperature Detector) and thermocouple (TC) inputs. The monitor conditions these signals and compares them against user-programmable alarm setpoints. 

        When using the 3500/61 133811-02, engineers can configure each channel for either RTD or TC measurement using the 3500 Rack Configuration Software. The module supports various RTD types (100Ω platinum 0.00385 or 0.00392 alpha, 120Ω nickel, 10Ω copper) and TC types (J, K, T, E). 

        The 3500/61 133811-02 consumes 9 watts nominal and provides front panel LEDs (OK, TX/RX, Bypass) for status indication. RTD excitation current is 925 ±15 μA at 25°C. The recorder outputs are 4-20 mA (0-600 Ω load, 0-12V compliance) with 0.3662 μA per bit resolution and approximately 100 ms update rate. 
        Alternative Names
        3500/61 133908-01 3500/61 133916-01 3500/61 133924-01 3500/61 133932-01
        Technical notes
        The 3500/61 133811-02 requires 3500 Rack Configuration Software to set measurement types (RTD or TC), full‑scale ranges, alarm setpoints, and alarm delays. No field calibration is required; all calibration is done at the factory.
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        Can 3500/61 133811-02 set independent alarms per channel?
        Yes. Each of the six channels can have its own Alert and Danger setpoints, adjustable from 0 to 100% of full scale via 3500 Rack Configuration Software. Accuracy is within 0.13% of the desired value. Alert delays: 1-60 seconds; Danger delays: 0.5-60 seconds.
        Which RTD types work with 3500/61 133811-02?
        The monitor supports 100Ω platinum RTD (alpha=0.00385 or 0.00392), 120Ω nickel RTD, and 10Ω copper RTD, in 3‑wire or 4‑wire configurations. The worldwide industrial standard is 100Ω platinum with 0.00385 alpha. Excitation current is 925 μA per transducer.
        Does 3500/61 133811-02 provide analog outputs?
        Yes. Each of the six channels has a 4-20 mA recorder output proportional to the monitor’s full‑scale range. Load resistance: 0‑600 Ω; voltage compliance: 0‑12V. Resolution: 0.3662 μA/bit (±0.15% at 25°C). Update rate is approximately 100 ms.
        Is 3500/61 133811-02 approved for hazardous areas?
        Yes. It is certified for Class I, Division 2 (CSA/NRTL/C) and ATEX/IECEx Zone 2 (Ex nA nC ic IIC T4 Gc) when used with appropriate I/O modules and installed per drawings 149243/149244. Temperature range: -20°C to +65°C for hazardous area installations.

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