BTC-402 - Deviation indication Analog Controllers

Build-in Laser Trim ASIC;
Easy to change range;
ON-OFFor time proportional selectable;
Compact, only 53mm in depth;
Wide selection of control output option.

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This analog controller is used for simple applications with on/off or P control, with deviation indication.

As a professional and experienced manufacturer, we supply high-performance and quality temperature controllers, which are also called temperature control, electronic temperature control, and electronic temperature controller.

  • Build-in Laser Trim ASIC
  • Easy to change range
  • ON-OFFor time proportional selectable
  • Compact, only 53mm in depth
  • Wide selection of control output option
  • Wide selection of ranges
  • Safety : UL, CSA
  • EMC, LVD : CE


Thermocouple (T/C) Type J, K
RTD 3-wires PT 100 ohms, DIN or JIS
Range See ordering information
Accuracy ±2% of span (BTC-402, BTC-401), 
±1% of span (BTC-404)
Cold Junction Compensatin ±0.1°C / 1°C
Rejection of RTD Lead Resistance ( 0.1°C - 0.025% of PV reading) / ohm
Sensor Break Protection Upscale
External Resistance  100 ohms max.
Normal Mode Rejection 60 dB
Common Mode Rejection 120 dB
Sample Rate 3 times / second
Proportion Band 2.2% of span
ON-OFF Hysteresis  1 % of span
Cycle Time 20 seconds for relay output, 1 second for pulsed voltage output, 0.02 second for linear current or voltage output..
Control Action Reverse action
Control Relay 5A / 240V max. resistive load
Pulsed Voltage 20mA / 32VDC max.
Current 4-20mA, 0-20mA, max. load 500 ohms
Voltage 0- 10V, min. load 500k ohms
Alarm Relay output, 2A / 240VAC max. resistive load
Set point Single turn wirewound potentiometer
Alarm Deviation alarm, adjustable ±10% of span
Manuel Reset  Adjustable 2.6% of span (BTC-404, 402 only)
Resolution of set point 0.2% of span
Accuracy of set point ±2% of span
Repeatability of set point ±0.1 % of span
Process Indicator BTC-402 : Deviation meter
BTC-404: 0.5” red 3-1/2 dight LED display
Status Indicator ON red LED Lamp
Alarm Indicator ON red LED Lamp
Rating BTC-402, 
BTC-401: 100-130VAC or 200-240VAC,50 / 60Hz
Consumption Less than 5VA
Operating Temperature 0-50°C
Humidity 0 to 90% RH (non-codensing)
Insulation 20M ohms min. (500VDC)
Breakdown AC2000V,50/60Hz,1 minute
Vibraton 10-55Hz,amplitude 1mm
Shock 200 m/s² (20g)
Weight BTC-404: 280 grams, 
BTC-402: 360 grams, 
BTC-401: 330 grams
Dimension 96(W)X96(H)X53mm (depth behind panel)
Panel cutout 92 X 92mm

Application: Plastic/rubber industry

It is installed on the heating material tube of the injection molding machine to control the temperature of the raw material, effectively control the liquid temperature of the plastic and improve the molding quality of the product.

Installed on the hot runner system for temperature control of runners and gates to stabilize the quality of the plastic.

Temperature control on the mold temperature machine, indirectly adjusting the temperature of the mold by adjusting the temperature of the hot fluid, can improve the production efficiency of the product and reduce the generation of defective products.

Electric heating furnace industry

Vacuum furnace equipment / vacuum melting / vacuum heat treatment

A new algorithm for PID adjustment using fuzzy rules is used to adjust the PID algorithm to eliminate the PID saturation integral phenomenon when the error is large. When the error is small, the improved PID algorithm is used for adjustment and can be automatically adjusted. Learn and memorize some of the characteristics of the controlled object to optimize the effect

Semiconductor industry

The temperature control of the electric heating cloth package is often used for the heating of the exhaust pipe valve parts of the semiconductor factory, the panel factory, or the special steel cylinder.

In the semiconductor temperature process control program, the heating system of the chamber, such as the decane process, the dichloromethane process

Ceramic / kiln / glass industry

Ceramic sintering furnace:

The heating process on the sintering furnace controls the heating rate to obtain a finished product with better quality and stability

Electric kiln:

Temperature adjustment during kiln firing to obtain a finished product with better quality and stability.

Fiber machinery

Dyeing machine:

control the temperature during dyeing to a suitable range, which in turn reduces chromatic aberration and improves the quality of dyed products.

Fiber dryer:

The temperature during drying is controlled within a suitable range to improve the fiber product.


Temperature Controller

Constant temperature and humidity machine

Heating/cooling air conditioning

Pool/bathroom temperature control facility

Ordering Code


1 Power Input BTC-402, BTC-401:
               3: 100-130VAC, 50Hz/60Hz / 200-240VAC, 50Hz/60Hz
               9: Other               
               4: 90-264VAC
               9: Other
2 Signal Input 1: Type J thermocouple
2: Type K thermocouple
3: PT 100 ohm DIN
4: PT 100 ohm JIS
9: Other
3 Range Code
Code Range  Code Range Selected Solder GAP
2 0 ~ 100°C A 50 ~ 20°F J3
3 0 ~ 200°C B 50 ~ 40°F J4
4 0 ~ 300°C C 50 ~ 55°F J5
5 0 ~ 400°C D 50 ~ 750°F J6
* * E 50 ~ 850°F J7
6 0 ~ 600°C F 50 ~ 1100°F J8
7 0 ~ 800°C G 50 ~ 1400°F J9
8 0 ~ 1200°C H *0 ~ 2200°F J10
9 Other K 50~199.9°F *
* * L 0~99.9°C *
* * M 0~199.9°C *
* Range K.L.M available for BTC-404 only
4 Control Mode
Code Mode  J11
1 ON-OFF Short
2 P ( proportional) Open
5 Output I 1: Relay, rated 5A/240VAC resistive
2: Pulsed voltage to drive SSR, rated 20mA/24V
3: 4-20mA linear, max. load 500 ohms
4: 0-20mA linear, max. load 500 ohms
5: 0-10V linear, min. load 500k ohms
9: Other
6 Output II 0: None
7 Alarm 0: None
1: Deviation alarm relay output, rated 2A/24OVAC max. resistive load
8 Communication 0: None

Industrial Technical Services, from Mississauga, Ontario is a single source Instrumentation and Automation company. We provide certified calibrations, PLC programming, custom controls and Panels.

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