T1A     Current Loop 

Temperature Transmitter 

$25 buy

T1A-420 in stock

T1A-05V in stock

T1B     Current Loop 

Temperature Transmitter 

$50 buy

T1B-420 in stock

T1B-05V in stock


                Two wire current loop (4-20 mA)
  1/2" threaded PVC housing - 2" long
  Low cost temperature measurement for PLCs and control systems
  Comes with two mounting nuts
  +/- 2% accuracy (T1A)   +/-1% (T1B)
  Reverse polarity protected


  PVC 2" long 1/2 x 13 threads


  PVC 2" long 1/2 x 13 threads (T1A)


PVC / AL   3" long 1/2 x 13 threads (T1B)




Current Loop - 420
0-5V version - 05V


RANGE -17 F to +183 F  (4-20mA range) -17 F to +183 F  (4-20mA range)
ACCURACY +/- 2% +/- 1%


(4-20mA) two wire  (4-20mA) two wire 
VOLTAGE OUTPUT (0-5V) three wire (0-5V) three wire
THREADS 1/2 x 13 1/2 x 13
HOUSING PVC epoxy sealed IP67 PVC epoxy sealed IP67

Part Number T1A or T1B / -420 = (two wire current loop version / -05V = (three wire 0-V version)

Accessories description Price  
SMB1-050/088 Sensor mounting bracket 1/2" and 7/8" holes $5
SJB1-050 1/2" sensor junction box w/side gland $15



Design Considerations

The T1 is a low cost way to input temperature information into a PLC, process control meter, distributed control system (DCS), or other industrial control system. The T1 can be mounted through any 1/2" hole and the two wires connected to an analog input card or other two wire 4-20 mA current loop circuit.

The -17 to + 183F range is the 4-20mA range. The full range of the sensor output is -40 to +185F (1.8 to 20.6mA) 

The T1 is designed for low cost applications where average precision is acceptable. At initial power up, the T1 may read as much as 3.5 degrees F lower for a minute or two until normal operating temperature is reached. The T1b has an aluminum extension that reduces the effect of "self-heating" for greater accuracy.

Direct exposure to sunlight can cause warming that may affect reading accuracy.

Because the T1 has a PVC housing,  care should be taken to insure that the operating environment does not get so hot that the PVC housing will soften. 

The T1 should not be used as the sole sensing element in critical equipment or safety applications. 


EMS  47745 - 193rd St. Toronto SD 57268 USA (605) 794-2072 (P)     (605) 794-2073 (F)  email