EATON MTL661 loop powered indicator

OVERVIEW

The MTL661-NA (field mounting) and the MTL662-NA (panel mounting) are 4-20mA, loop-powered indicators for Zone 2 hazardous area operation. The small voltage drop of <1V allows the loop powered display to be installed in almost any 4–20mA loop. Configuration is carried out using the front panel switches (which can be password protected). Range units, upper and lower limits, decimal point positioning and number of digits displayed are all configured via the front panel.

SPECIFICATION

Unit location

Zone 2, IIC, T4 hazardous area Div 2, Group A, hazardous

location Display 

Six digits - 17mm height (process value) Eleven 8mm digits (process units & current)

Voltage requirements under all conditions

<1V, loop powered Ambient Temperature Operating:  –20°C to +70°C Storage: –40°C to +80°C

Humidity

5-99%RH

Input range

4-20mA

Over-range 200mA maximum without damage

Display Range–999999 to 999999 (Configurable) 

Number of digits after decimal point configurable 

Zero and span

Setting: anywhere in range

Scale direction

Normal or reverse: software selected. 

Out of range indication

 "------ RANGE ERROR" displayed between 3.5 - 3.75mA

"999999 RANGE ERROR" displayed at current >22mA 

Operating modes

Linear or square root extraction is software selectable. 

Accuracy at 20°C 

± 0.01mA

Effects of temperature on accuracy

Zero: ± 0.0025% of span /°C

Span: ± 0.01% of span /°C

ACCESSORIES

Frequently Asked Questions (FAQ) – SC Automation Limited​​

​​1.   Who is SC Automation Limited?​​

SC Automation Limited (SC) is comprised of a team with decades of experience in the automation industry.

​​2.   Where does SC mainly distribute its products?​​

Our products are primarily exported to:

•   ​​Africa:​​ South Africa
• ​  ​Asia:​​ Southeast Asia, Middle East
• ​  ​Europe:​​ Nordic countries
•   ​​Americas:​​ South America
•   ​​Oceania:​​ Australia, New Zealand

​​3.   What types of automation instruments does SC specialize in?​​

We focus on:

• ​​  Pressure Transmitters​​
• ​  ​Flow Meters​​
• ​  ​Ultrasonic Level Sensors​​
• ​​  Vibration Monitoring Systems​​
• ​  ​Water Quality Analyzers​​
•   ​​Electric Actuators​​
• ​​  Solenoid Valves​​
•   ​​Sensors & More​​

​​4.   Which brands does SC supply?​​

We provide ​​genuine new products​​ from leading brands, including but not limited to:
✅ ​​Bently Nevada​​ | ✅ ​​Endress+Hauser (E+H)​​ | ✅ ​​Pepperl+Fuchs (P+F)​​
✅ ​​MTL​​ | ✅ ​​Allen-Bradley (AB)​​ | ✅ ​​Rosemount (Emerson)​​
✅ ​​Yokogawa​​ | ✅ ​​AUMA​​ | ✅ ​​IFM​​ | ✅ ​​SMC​​ | ✅ ​​Festo​​
Need a specific brand? We can source it for you!

​​5.   Are SC’s products 100% genuine and new?​​

​​Yes!​​ We only supply ​​original, brand-new​​ products with full manufacturer warranties.

​​6.   Do SC’s products come with a warranty?​​

✅ ​​1-year warranty​​ for all products (except consumables like electrodes).

​​7.   What delivery terms does SC accept?​​

• ​  ​EXW (Ex-Works)​​
•   ​​CIF (Cost, Insurance & Freight)​​

​​8.   What currencies are accepted for payment?​​

• ​​  USD​​ | ​​EUR​​ | ​​CNY (RMB)​​ | ​​HKD​​

​​9.   What payment methods does SC support?​​

• ​​  T/T (Bank Transfer)​​
•   ​​Alipay​​ | ​​WeChat Pay​​

​​10.   How can customers contact SC?​​

• ​​  WhatsApp:​​ +86-13715021826
• ​  ​WeChat:​​ +86-15012673027 
•   ​​Email:​​ joy@cc-scauto.com

​​11.   What are SC’s working hours?​​

​​24/7 support!​​ We respond promptly to inquiries at any time.

​​12.   What is SC’s company philosophy?​​

"Honesty in Relationships, Excellence in Work – Integrity First."

​​13.   What shipping methods does SC support?​​

•   ​​Express Couriers:​​ DHL, UPS, TNT, FedEx
• ​  ​Special Routes:​​ Russia & Pakistan dedicated lines
•   ​​Customer’s Own Logistics:​​ Share your partner’s details, and we’ll arrange pickup.

​​14.   Where are goods delivered?​​

• ​​  Mainland China​​ or ​​Hong Kong​​ (brand-dependent).

​​15.   Does SC support pre-shipment inspection?​​

✅ ​​Yes!​​ If you cannot visit, a trusted third party can inspect on your behalf.

​​16.   What are SC’s payment terms?​​

• ​​  Full payment upfront​​ for orders delivered within ​​1 week​​.
• ​​  30% deposit​​ for orders with ​​longer lead times​​.

​​17.   Why choose SC Automation Limited?​​

✔ ​​  100% genuine products​​ with reliable warranties
✔   ​​Fast quotations & technical support​​ (e.g., E+H product selection)
✔ ​​  Year-round shipping​​ (excluding logistics holidays)
✔ ​​  Hassle-free sourcing​​ – Your trusted one-stop automation supplier!

​​Need more details? Contact us anytime!​

�� WhatsApp: ​​+86-13715021826​​  WeChat:15012673027  | ✉ Email: ​​joy@cc-scauto.com​